US3982819A
Expired / Lapsed
US
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Fluid gap glan-laser prism
Assignee: United States Department of the Navy
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Filing: 1975-05-22
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Granted: 1976-09-28
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Expires: 1995-05-22
Abstract
Abstract A Glan-laser prism polarizer in which spaced prisms are surrounded with an index of refraction matching fluid and the gap between the prisms is also filled with the fluid.
Inventors
- 👤 Jules P. Letellier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:26
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/02; G02B5/00; G02B5/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
105 words
A Glan-laser prism polarizer which comprises: first and second prisms made of a biregringent material positioned with end faces parallel with each other and with sloping faces adjacent each other with their optical axes parallel said sloping faces having a different slope and meeting at one edge to form an angular gap between said prisms with the apex of said angular gap at the point at which said faces meet, said first and second prisms being immersed in a fluorinated liquid with said liquid filling said angular gap therebetween, and said liquid having an index of refraction which is less than that of said prisms.
Claim 2
Dependent Claim
105 words
A Glan-laser prism polarizer which comprises: first and second prisms made of a biregringent material positioned with end faces parallel with each other and with sloping faces adjacent each other with their optical axes parallel said sloping faces having a different slope and meeting at one edge to form an angular gap between said prisms with the apex of said angular gap at the point at which said faces meet, said first and second prisms being immersed in a fluorinated liquid with said liquid filling said angular gap therebetween, and said liquid having an index of refraction which is less than that of said prisms.
Claim 3
Dependent Claim
54 words
A Glan-laser prism polarizer as claimed in claim 1; wherein, the index of refraction of the prisms for light traveling through said crystal with its electric field vector parallel to the optic axis is about 1.44 and is about 1.47 for the light traveling with its electric field vector perpendicular to the optic axis.
Claim 4
Dependent Claim
19 words
A Glan-laser prism as claimed in claim 2; wherein, the index of refraction of said fluid is about 1.3.
References Cited (Backward Citations)
US3552823A
Cited
US3914018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |