US4047805A
Expired / Lapsed
US
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Ripple-free dichroic mirrors
Assignee: Canon Inc
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Filing: 1975-07-23
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Granted: 1977-09-13
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Expires: 1995-07-23
Abstract
Abstract A dichroic mirror is made up of alternating layers of a material having a high index of refraction and a material having a low index of refraction arranged in a stack on one surface of a substrate. The dichroic mirror is effective to separate light in the visible spectrum range, incident thereupon, into two components, one of which is transmitted and the other of which is reflected. Each of the first, second and last layers in the stack, counting outwardly from the substrate, is controlled to an optical thickness deviated from an odd number of quarter-wavelengths of a design wavelength in air, to effect a uniform distribution of transmittance coefficients over the transmitted components.
Inventors
- 👤 Nobuyuki Sekimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:41
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/28; G02B5/285; G02B27/00; G02B27/10; G02B27/1006; G02B27/14; G02B27/142; G02B5/08; G02B5/0816; G02B5/0825
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
174 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 10-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 10-layer films being composed of alterating layers of a high index material having an index of refraction of 2.20 and a low index material having an index refraction of 1.38, and the layer contacting with said substrate is a high index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (2.85/4) λ o , the optical thickness of said second layer is (0.8/4) λ o , and the optical thickness of said outermost layers if (1.6/4) λ o .
Claim 2
Dependent Claim
174 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 10-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 10-layer films being composed of alterating layers of a high index material having an index of refraction of 2.20 and a low index material having an index refraction of 1.38, and the layer contacting with said substrate is a high index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (2.85/4) λ o , the optical thickness of said second layer is (0.8/4) λ o , and the optical thickness of said outermost layers if (1.6/4) λ o .
Claim 3
Dependent Claim
174 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 11-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 11-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a high index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (2.8/4) λ o , the optical thickness of said second layer is (0.8/4) λ o , and the optical thickness of said outermost layer is (2.7/4) λ.sub. o.
Claim 4
Dependent Claim
174 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 11-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 11-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a high index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (2.8/4) λ o , the optical thickness of said second layer is (0.8/4) λ o , and the optical thickness of said outermost layer is (2.7/4) λ.sub. o.
Claim 5
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 10-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 10-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a high index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (3.1/4) λ o , the optical thickness of said second layer is (1.1/4) λ o , and the optical thickness of said outermost layer is (0.6/4) λ o .
Claim 6
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 10-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 10-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a high index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (3.1/4) λ o , the optical thickness of said second layer is (1.1/4) λ o , and the optical thickness of said outermost layer is (0.6/4) λ o .
Claim 7
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 11-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 11-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a high index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (1.6/4) λ o , the optical thickness of said second layer is (1.2/4) λ o , and the optical thickness of said outermost layers if (1.5/4) λ o .
Claim 8
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 11-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 11-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a high index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (1.6/4) λ o , the optical thickness of said second layer is (1.2/4) λ o , and the optical thickness of said outermost layers if (1.5/4) λ o .
Claim 9
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 11-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 11-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a high index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (3.2/4) λ o , the optical thickness of said second layer is (1.2/4) λ o , and the optical thickness of said outermost layer is (3.15/4) λ o .
Claim 10
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 11-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 11-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a high index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (3.2/4) λ o , the optical thickness of said second layer is (1.2/4) λ o , and the optical thickness of said outermost layer is (3.15/4) λ o .
Claim 11
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 12-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 12-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a low index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (0.6/4) λ o , the optical thickness of said second layer is (2.8/4) λ o , and the optical thickness of said outermost layers if (2.7/4) λ o .
Claim 12
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 12-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 12-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a low index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (0.6/4) λ o , the optical thickness of said second layer is (2.8/4) λ o , and the optical thickness of said outermost layers if (2.7/4) λ o .
Claim 13
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 11-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 11-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a low index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (0.6/4) λ o , the optical thickness of said second layer is (2.9/4) λ o , and the optical thickness of said outermost layers if (1.6/4) λ o .
Claim 14
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 11-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 11-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a low index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (0.6/4) λ o , the optical thickness of said second layer is (2.9/4) λ o , and the optical thickness of said outermost layers if (1.6/4) λ o .
Claim 15
Dependent Claim
174 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 12-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 12-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a low index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (1.3/4) λ o , the optical thickness of said second layer is (1.5/4) λ o , and the optical thickness of said outermost layers is (1.5/4) λ.sub. o.
Claim 16
Dependent Claim
174 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 12-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 12-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a low index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (1.3/4) λ o , the optical thickness of said second layer is (1.5/4) λ o , and the optical thickness of said outermost layers is (1.5/4) λ.sub. o.
Claim 17
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 12-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 12-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a low index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, wherein the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (1.3/4) λ o , the optical thickness of said second layer is (3.15/4) λ o , and the optical thickness of said outermost layers is (3.3/4) λ o .
Claim 18
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 12-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 12-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a low index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, wherein the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (1.3/4) λ o , the optical thickness of said second layer is (3.15/4) λ o , and the optical thickness of said outermost layers is (3.3/4) λ o .
Claim 19
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 11-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 11-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a low index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (1.2/4) λ o , the optical thickness of said second layer is (3.1/4) λ o , and the optical thickness of said outermost layers if (0.6/4) λ o .
Claim 20
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 11-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 11-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a low index material, said high index layers each having a basic design optical thickness of 3/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (1.2/4) λ o , the optical thickness of said second layer is (3.1/4) λ o , and the optical thickness of said outermost layers if (0.6/4) λ o .
Claim 21
Dependent Claim
174 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 14-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 14-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a high index material, said high index layers each having a basic design optical thickness of 1/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (0.6/4) λ o , the optical thickness of said second layer if (0.8/4) λ o , and the optical thickness of said outermost layers is (1.9/4) λ.sub. o.
Claim 22
Dependent Claim
174 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 14-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 14-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a high index material, said high index layers each having a basic design optical thickness of 1/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (0.6/4) λ o , the optical thickness of said second layer if (0.8/4) λ o , and the optical thickness of said outermost layers is (1.9/4) λ.sub. o.
Claim 23
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 15-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 15-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a high index material, said high index layers each having a basic design optical thickness of 1/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (0.6/4) λ o , the optical thickness of said second layer is (0.8/4) λ o , and the optical thickness of said outermost layers if (0.5/4) λ o .
Claim 24
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 15-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 15-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a high index material, said high index layers each having a basic design optical thickness of 1/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (0.6/4) λ o , the optical thickness of said second layer is (0.8/4) λ o , and the optical thickness of said outermost layers if (0.5/4) λ o .
Claim 25
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 14-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 14-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a high index material, said high index layers each having a basic design optical thickness of 1/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (1.2/4) λ o , the optical thickness of said second layer is (1.15/4) λ o , and the optical thickness of said outermost layers is (0.6/4) λ o .
Claim 26
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 14-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 14-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a high index material, said high index layers each having a basic design optical thickness of 1/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (1.2/4) λ o , the optical thickness of said second layer is (1.15/4) λ o , and the optical thickness of said outermost layers is (0.6/4) λ o .
Claim 27
Dependent Claim
174 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 13-layer films coated wover said substrate, said substrate having an index of refraction of 1.52, and said 13-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a high index material, said high index layers each having a basic design optical thickness of 1/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (1.25/4) λ o , the optical thickness of said second layer is (1.1/4) λ o , and the optical thickness of said outermost layers is (1.3/4) λ.sub. o.
Claim 28
Dependent Claim
174 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 13-layer films coated wover said substrate, said substrate having an index of refraction of 1.52, and said 13-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a high index material, said high index layers each having a basic design optical thickness of 1/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (1.25/4) λ o , the optical thickness of said second layer is (1.1/4) λ o , and the optical thickness of said outermost layers is (1.3/4) λ.sub. o.
Claim 29
Dependent Claim
174 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 14-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 14-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a low index material, said high index layers each having a basic design optical thickness of 1/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (0.6/4) λ o , the optical thickness of said second layer is (0.6/4) λ o , and the optical thickness of said outermost layer is (0.5/4) λ o .
Claim 30
Dependent Claim
174 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 14-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 14-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a low index material, said high index layers each having a basic design optical thickness of 1/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (0.6/4) λ o , the optical thickness of said second layer is (0.6/4) λ o , and the optical thickness of said outermost layer is (0.5/4) λ o .
Claim 31
Dependent Claim
174 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 13-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 13-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with substrate is a low index material, said high index layers each having a basic design optical thickness of 1/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (0.6/4) λ o , the optical thickness of said second layer is (0.6/4) λ o , and the optical thickness of said outermost layers is (1.8/4) λ o .
Claim 32
Dependent Claim
174 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 13-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 13-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with substrate is a low index material, said high index layers each having a basic design optical thickness of 1/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (0.6/4) λ o , the optical thickness of said second layer is (0.6/4) λ o , and the optical thickness of said outermost layers is (1.8/4) λ o .
Claim 33
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 14-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 14-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a low index material, said high index layers each having a basic design optical thickness of 1/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is 1.3/4 λ o , the optical thickness of said second layer is 1.25/4 λ o , and the optical thickness of said outermost layers is 1.3/4 λ o .
Claim 34
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 14-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 14-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a low index material, said high index layers each having a basic design optical thickness of 1/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate have optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is 1.3/4 λ o , the optical thickness of said second layer is 1.25/4 λ o , and the optical thickness of said outermost layers is 1.3/4 λ o .
Claim 35
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 13-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 13-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a low index material, said high index layers each having a basic design optical thickness of 1/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate having optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (1.3/4) λ o , the optical thickness of said second layer is (1.25/4) λ o , and the optical thickness of said outermost layers is (0.6/4) λ o .
Claim 36
Dependent Claim
175 words
A dichroic mirror, in which ripple is eliminated, consisting of a substrate and 13-layer films coated over said substrate, said substrate having an index of refraction of 1.52, and said 13-layer films being composed of alternating layers of a high index material having an index of refraction of 2.20 and a low index material having an index of refraction of 1.38, and the layer contacting with said substrate is a low index material, said high index layers each having a basic design optical thickness of 1/4λ o , and said low index layers each having a basic design optical thickness of 1/4λ o , wherein λ o is a design wave length in air, whereby the first, the second and the outermost layers counting from the substrate having optical thickness slightly deviated from the corresponding basic optical thickness, the optical thickness of said first layer is (1.3/4) λ o , the optical thickness of said second layer is (1.25/4) λ o , and the optical thickness of said outermost layers is (0.6/4) λ o .
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |