US3572895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical deflection system including an alternating sequence of birefringent prisms and polarizers
Assignee: US Philips Corp
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Filing: 1968-12-03
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Granted: 1971-03-30
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Expires: 1988-12-03
Abstract
Abstract An optical deflection system including a plurality of birefringent prisms separated by polarizers arranged in a sequence. At least one of the prisms has a refracting angle greater than that of any of the other prisms, and is oriented in a direction substantially opposite to that of the refracting angles of the other prisms.
Inventors
- 👤 Uwe Schmidt
- 👤 Walter Thust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:59
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/28; G02B27/283; G02B5/00; G02B5/30; G02B5/3083; G02F; G02F1/00; G02F1/29; G02F1/31
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
65 words
An optical deflection system for deflecting a light beam along a given axis comprising a plurality of birefringent prisms separated by polarizers, one of said prisms having a refracting angle greater than that of any of the other prisms, the truncated refracting portion of said prism pointing in a direction opposite to the direction in which the truncated refracting portion of the other prism point.
Claim 2
Dependent Claim
65 words
An optical deflection system for deflecting a light beam along a given axis comprising a plurality of birefringent prisms separated by polarizers, one of said prisms having a refracting angle greater than that of any of the other prisms, the truncated refracting portion of said prism pointing in a direction opposite to the direction in which the truncated refracting portion of the other prism point.
Claim 3
Dependent Claim
22 words
An optical system as claimed in claim 1, wherein all the prisms each have a given optical axis with the same orientation.
Claim 4
Dependent Claim
58 words
A optical system as claimed in claim 1, wherein in the prism having the greatest refracting angle, said prism has an optic axis which is rotated through 90* with respect to the optic axis of each of the other prisms and wherein the optic axis of all of the said other prisms are oriented in the same direction.
Claim 5
Dependent Claim
24 words
An optical system as claimed in claim 1, wherein the prism having the greatest refracting angle is the final prism in a given sequence.
Claim 6
Dependent Claim
24 words
An optical system as claimed in claim 1, wherein the prism having the greatest refracting angle is the penultimate prism in a given sequence.
Claim 7
Dependent Claim
56 words
An optical system as claimed in claim 1, wherein the system includes a single isotropic prism the refracting angle of which is equal to that of a prism having the smallest refracting angle and the refractive index of which is such that the axis of the system corresponds to the axis of symmetry of the beam.
Claim 8
Dependent Claim
20 words
An optical system as claimed in claim 1, wherein the birefringent prisms consist of calcite and are surrounded by nitrobenzene.
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |