US5771122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical beamsplitter
Assignee: Discovision Associates
•
Filing: 1997-01-02
•
Granted: 1998-06-23
•
Expires: 2017-01-02
Abstract
Abstract An optical beamsplitter comprises a right angle prism having a hypotenuse and two legs wherein the hypotenuse includes an optically selective coating deposited thereon. An optical element is positioned adjacent the hypotenuse such that the hypotenuse and the optical element form a beamsplitting interface. Various optical elements are utilized to achieve the desired spatial and angular relationships between incoming and outgoing light beams. Several embodiments are disclosed wherein the optical element can comprise a flat plate for providing spatial offset, a wedged plate for producing spatial and angular offset, a lens for adding optical power, or a faceted thin plate.
Inventors
- 👤 Curtis A. Shuman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:53
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/10; G02B27/16; G02B27/14; G02B27/143; G02B27/148; G02B27/28; G02B27/283; G11; G11B; G11B7/00; G11B7/12; G11B7/135; G11B7/1356; G11B7/1359; G11B7/1362; G11B7/1372; G11B7/1376; G11B7/1395
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
217 words
An optical beam splitting assembly for use in an optical system, said assembly comprising: a lightsource producing an incident light beam including a first polarization component and a second polarization component; a reflective storage medium for receiving said incident light beam after processing thereof and reflecting a corresponding reflected light beam; a first thin optical element and a second thin optical element positioned adjacent thereto, said first and second optical elements each having a front surface and a rear surface defining a maximum thickness between respective front and rear surfaces; and an optically selective coating positioned between said first thin optical element and said second thin optical element to form a beam splitting interface, said optically selective coating being polarization sensitive, said incident light beam being transmitted through said first thin optical element and directed toward said beam splitting interface to thereby form two portions including a first portion which is reflected from said beam splitting interface to form a first outgoing beam having said first polarization component, and a second portion which is transmitted through said beam splitting interface and thereafter reflected from said rear surface of said second thin optical element to form a second outgoing beam having said second polarization component, said first and second outgoing beams being directed toward said reflective storage medium.
Claim 2
Dependent Claim
217 words
An optical beam splitting assembly for use in an optical system, said assembly comprising: a lightsource producing an incident light beam including a first polarization component and a second polarization component; a reflective storage medium for receiving said incident light beam after processing thereof and reflecting a corresponding reflected light beam; a first thin optical element and a second thin optical element positioned adjacent thereto, said first and second optical elements each having a front surface and a rear surface defining a maximum thickness between respective front and rear surfaces; and an optically selective coating positioned between said first thin optical element and said second thin optical element to form a beam splitting interface, said optically selective coating being polarization sensitive, said incident light beam being transmitted through said first thin optical element and directed toward said beam splitting interface to thereby form two portions including a first portion which is reflected from said beam splitting interface to form a first outgoing beam having said first polarization component, and a second portion which is transmitted through said beam splitting interface and thereafter reflected from said rear surface of said second thin optical element to form a second outgoing beam having said second polarization component, said first and second outgoing beams being directed toward said reflective storage medium.
Claim 3
Dependent Claim
25 words
The optical beam splitting assembly according to claim 1 further including a reflective coating deposited on said rear surface of said second thin optical element.
Claim 4
Dependent Claim
50 words
The optical beam splitting assembly according to claim 1 wherein said first thin optical element and said second thin optical element are oriented relative to said incident light beam so that said first portion and said second portion of said incident light beam are reflected at approximately the same angle.
Claim 5
Dependent Claim
57 words
The optical beam splitting assembly according to claim 1 wherein said first thin optical element and said second thin optical element each have an index of refraction being different than the index of refraction of air so that said first and second outgoing beams exit said front surface of said first optical element at a predetermined angle.
Claim 6
Dependent Claim
21 words
The optical beam splitting assembly according to claim 1 wherein said first outgoing beam is parallel to said second outgoing beam.
Claim 7
Dependent Claim
47 words
The optical beam splitting assembly according to claim 5 wherein said first outgoing beam is capable of writing data on to said reflective storage medium, and said second outgoing beam is capable of reading data stored on said reflective storage medium, said writing and reading occurring simultaneously.
References Cited (Backward Citations)
GB271963A
Cited
US1722357A
Cited
US1926716A
Cited
US1898787A
Cited
US2088660A
Cited
US2240988A
Cited
FR887329A
Cited
GB561503A
Cited
US2409407A
Cited
US2405960A
Cited
US2432432A
Cited
US2748659A
Cited
US2816480A
Cited
US2815695A
Cited
US3075869A
Cited
US3536375A
Cited
US3514182A
Cited
US3559090A
Cited
US3584933A
Cited
US3652167A
Cited
US3677621A
Cited
US3943019A
Cited
GB1396712A
Cited
US4282598A
Cited
US4809247A
Cited
US4451913A
Cited
US4451913B1
Cited
GB1468679A
Cited
US3868168A
Cited
US3922069A
Cited
US3992574A
Cited
US3844638A
Cited
US3998524A
Cited
US4084180A
Cited
US4084881A
Cited
GB1561407A
Cited
US4253723A
Cited
GB1513314A
Cited
US4128308A
Cited
US4333173A
Cited
US4411500A
Cited
US4458980A
Cited
US4358200A
Cited
US4334300A
Cited
US4399529A
Cited
US4525625A
Cited
US4422168A
Cited
US4453239A
Cited
US4455085A
Cited
US4425636A
Cited
US4423495A
Cited
US4423496A
Cited
US4447722A
Cited
GB2087584B
Cited
US4450547A
Cited
US4411492A
Cited
US4504938A
Cited
US4507766A
Cited
US4489408A
Cited
US4573149A
Cited
US4502783A
Cited
US4441175A
Cited
US4542492A
Cited
US4607356A
Cited
GB2121211B
Cited
US4641926A
Cited
US4624526A
Cited
US4612437A
Cited
US4497534A
Cited
US4565426A
Cited
US4948233A
Cited
US4770507A
Cited
US4689481A
Cited
US4733065A
Cited
US4694447A
Cited
US4679891A
Cited
GB2165639B
Cited
US4691098A
Cited
US4907858A
Cited
US4627690A
Cited
US4716559A
Cited
US4750819A
Cited
US4804835A
Cited
US5051974A
Cited
US4825064A
Cited
US4890272A
Cited
US4800556A
Cited
US4808823A
Cited
US4863246A
Cited
US4876680A
Cited
US4823335A
Cited
US4850686A
Cited
US4872747A
Cited
US4862442A
Cited
US5237446A
Cited
US4822151A
Cited
US5095476A
Cited
US5150350A
Cited
US5105407A
Cited
US5151889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-22 | 2001-12-22 | 2002-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-22 | 2005-12-22 | 2006-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-22 | 2009-12-22 | 2010-06-23 | $7700.00 | Window Closed / Lapsed |