US4759615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illumination system using amplified polarized light
Assignee: American Sterilizer Co
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Filing: 1986-06-09
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Granted: 1988-07-26
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Expires: 2006-06-09
Abstract
Abstract An illumination system is comprised of a source of polarized light for illuminating a subject. A light amplifier having an input and an output is provided. A filter is positioned at the input of the amplifier for admitting into the amplifier light of the proper polarization reflected by the subject such that the admitted polarized light is amplified to produce a glare-free, visually enhanced image of the subject.
Inventors
- 👤 Richard C. Bainbridge
- 👤 Kenneth J. Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:43
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/28; G02B27/281; F; F21; F21L; F21L2/00; F21V; F21V9/00; F21V9/14; Y; Y10; Y10S; Y10S362/00; Y10S362/804
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
A head-worn apparatus for providing visual enhancement by amplifying polarized light, said apparatus comprising: a source of polarized light for illuminating a subject; means for amplifying light, said means having an input and an output; and filter means positioned at said input of said amplifying means for admitting into said amplifying means light of the proper polarization reflected by the subject such that said admitted polarized light is amplified thereby producing a glare-free visually enhanced image available at said output of said amplifying means, said means for amplifying and said filter means being carried by the head-worn apparatus in a fixed relationship with respect to said source of polarized light.
Claim 2
Dependent Claim
110 words
A head-worn apparatus for providing visual enhancement by amplifying polarized light, said apparatus comprising: a source of polarized light for illuminating a subject; means for amplifying light, said means having an input and an output; and filter means positioned at said input of said amplifying means for admitting into said amplifying means light of the proper polarization reflected by the subject such that said admitted polarized light is amplified thereby producing a glare-free visually enhanced image available at said output of said amplifying means, said means for amplifying and said filter means being carried by the head-worn apparatus in a fixed relationship with respect to said source of polarized light.
Claim 3
Dependent Claim
27 words
The system of claim 1 wherein said source of polarized light includes a light and a second filter means for polarizing said light emanating from said light.
Claim 4
Dependent Claim
23 words
The system of claim 2 wherein said second filter means includes a linear polarizer and said filter means includes a complimentary linear polarizer.
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) | 1991-07-26 | 1992-01-25 | 1992-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-26 | 1996-01-25 | 1996-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-26 | 2000-01-25 | 2000-07-26 | $7700.00 | Window Closed / Lapsed |