US4969734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method of forming and projecting high precision optical images
Assignee: Transamerica Business Credit Corp
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Filing: 1988-11-21
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Granted: 1990-11-13
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Expires: 2008-11-21
Abstract
Abstract An image projection apparatus in which an image object plane contains a plurality of reflecting images and a light source and optical system projects a beam on each of said plurality of images. Spaced projection lenses are positioned to receive the light reflected from the image and direct the light on a projection surface with the plurality of reflected images in coregistration.
Inventors
- 👤 Frederic J. Kahn
- 👤 Paul N. Kendrick
- 👤 Jerry Leff
- 👤 Linden J. Livoni
- 👤 Bryan E. Loucks
- 👤 David E. Stepner
- 👤 Kenneth G. Witte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:57
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/005
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
111 words
A projection apparatus including a light source, optical beam forming means for creating at least two light beams from said light source, an image object surface containing at least two spaced light modifying images, a single relay condenser lens disposed to receive said at least two light beams and directing a different one of said beams on each of said light modifying images, image forming means including at least two spaced projection lenses positioned to receive light relayed by said single relay condenser lens and modifying by said light modifying images and direct the light from said light modifying images onto a receiving plane so that the images are in coregistration.
Claim 2
Dependent Claim
111 words
A projection apparatus including a light source, optical beam forming means for creating at least two light beams from said light source, an image object surface containing at least two spaced light modifying images, a single relay condenser lens disposed to receive said at least two light beams and directing a different one of said beams on each of said light modifying images, image forming means including at least two spaced projection lenses positioned to receive light relayed by said single relay condenser lens and modifying by said light modifying images and direct the light from said light modifying images onto a receiving plane so that the images are in coregistration.
Claim 3
Dependent Claim
17 words
A projection apparatus as in claim 1 in which the spaced light modifying images are reflecting images.
Claim 4
Dependent Claim
22 words
A projection apparatus as in claim 1 or 2 in which the light modifying images are formed by an electronic light valve.
Claim 5
Dependent Claim
22 words
A projection apparatus as in claim 1 or 2 in which the light modifying images are formed by a smectic liquid crystal.
Claim 6
Dependent Claim
120 words
A projection apparatus including a light source, optical beams forming means receiving light from said light source and creating at least three light beams with light of different wavelengths, an image object surface containing at least three spaced light modifying images, a single relay condenser lens disposed to receive said at least three light beams with light of different wavelengths and directing said beams one on each of said light modifying images, image forming means including at least three spaced projection lenses positioned to receive light relayed by said single relay condenser lens and modified by said light modifying images and direct the light from said light modifying images onto a receiving plane so that the images are in co-registration.
Claim 7
Dependent Claim
120 words
A projection apparatus including a light source, optical beams forming means receiving light from said light source and creating at least three light beams with light of different wavelengths, an image object surface containing at least three spaced light modifying images, a single relay condenser lens disposed to receive said at least three light beams with light of different wavelengths and directing said beams one on each of said light modifying images, image forming means including at least three spaced projection lenses positioned to receive light relayed by said single relay condenser lens and modified by said light modifying images and direct the light from said light modifying images onto a receiving plane so that the images are in co-registration.
Claim 8
Dependent Claim
33 words
A projection apparatus as in claim 5 in which said light modifying images comprise four images, said optical means forms four beams and four projection lenses direct the light onto said receiving plane.
Claim 9
Dependent Claim
132 words
A projection apparatus including a light source an image object plane containing at least two spaced reflecting images, optical means disposed to receive light from said light source and form at least two beams and directing one of said beams on each of said reflecting images, at least two spaced multielement projection lenses in which the power is concentrated primarily on the inner elements and achromatization is concentrated primarily in the outer elements to provide lenses with front to rear surface lengths less than half the focal length to provide a compact disign with relatively small off-axis angle, high resolution and low distortion, said projection lenses positioned to receive light reflected by said images and direct the light from said images onto a receiving plane so that the images are in coregistration.
Claim 10
Dependent Claim
132 words
A projection apparatus including a light source an image object plane containing at least two spaced reflecting images, optical means disposed to receive light from said light source and form at least two beams and directing one of said beams on each of said reflecting images, at least two spaced multielement projection lenses in which the power is concentrated primarily on the inner elements and achromatization is concentrated primarily in the outer elements to provide lenses with front to rear surface lengths less than half the focal length to provide a compact disign with relatively small off-axis angle, high resolution and low distortion, said projection lenses positioned to receive light reflected by said images and direct the light from said images onto a receiving plane so that the images are in coregistration.
Claim 11
Dependent Claim
17 words
A projection apparatus as in claim 5 in which the spaced light modifying images are reflecting images.
Claim 12
Dependent Claim
22 words
A projection apparatus as in claim 5 or 7 in which the light modifying images are formed by an electronic light valve.
Claim 13
Dependent Claim
22 words
A projection apparatus as in claim 5 or 7 in which the light modifying images are formed by a smectic liquid crystal.
Claim 14
Dependent Claim
101 words
A projection apparatus including means for forming at least two light beams, an image object surface containing at least two spaced light modifying images, a single relay condenser lens disposed to receive said at least two light beams and directing a different one of said beams on each of said light modifying images, image forming means includiung at least two spaced projection lenses positioned to receive light relayed by said single relay condenser lens and modified by said light modifying images and direct the light from said light modifying images onto a receiving plane so that the images are in coregistration.
Claim 15
Dependent Claim
101 words
A projection apparatus including means for forming at least two light beams, an image object surface containing at least two spaced light modifying images, a single relay condenser lens disposed to receive said at least two light beams and directing a different one of said beams on each of said light modifying images, image forming means includiung at least two spaced projection lenses positioned to receive light relayed by said single relay condenser lens and modified by said light modifying images and direct the light from said light modifying images onto a receiving plane so that the images are in coregistration.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |