Patent USH220H successfully refreshed from Google Patents.
USH220H
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical performance comparator
Assignee: United States Department of the Army
•
Filing: 1986-03-13
•
Granted: 1987-02-03
•
Expires: 2006-03-13
Abstract
Abstract Improved measurement of optical material degradation is provided by a comator utilizing a vidicon focused upon an illuminated white contrast target card. The optic under test is positioned between the vidicon and the target. The output of the vidicon as it scans the card is compared with the output for an undamaged optic.
Inventors
- 👤 E. Michael Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:03
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/8851; G01N2021/8887; G01N2021/889
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
86 words
An optical performance comparator for determining optical degradation of an optical device, comprising: support means for the optical device; target means for viewing through the optical device; illumination means for illuminating the target means; viewing means for selectively and incrementally viewing the target means through the optical device, the viewing means having an output proportional to the magnitude of light sensed by the viewing means; and measuring means for measuring the amplitude and phase changes in the output of the viewing means with respect to time.
Claim 2
Dependent Claim
86 words
An optical performance comparator for determining optical degradation of an optical device, comprising: support means for the optical device; target means for viewing through the optical device; illumination means for illuminating the target means; viewing means for selectively and incrementally viewing the target means through the optical device, the viewing means having an output proportional to the magnitude of light sensed by the viewing means; and measuring means for measuring the amplitude and phase changes in the output of the viewing means with respect to time.
Claim 3
Dependent Claim
28 words
An optical performance comparator as set forth in claim 1 above where the target means has at least one white portion bordering on at least one black portion.
Claim 4
Dependent Claim
20 words
An optical performance comparator as set forth in claim 2 above where said viewing means includes a vidicon tube means.
Claim 5
Dependent Claim
19 words
An optical performance comparator as set forth in claim 2 above where the viewing means is a television camera.
Claim 6
Dependent Claim
27 words
An optical performance comparator as set forth in claim 4 above where the television camera includes raster scanning circuitry and outputs of horizontal and vertical synchronization signals.
Claim 7
Dependent Claim
18 words
An optical performance comparator as set forth in claim 5 above where said measuring means is an oscilloscope.
Claim 8
Dependent Claim
18 words
An optical performance comparator as set forth in claim 6 above where said illumination means is a lamp.
Claim 9
Dependent Claim
38 words
An optical performance comparator as set forth in claim 7 above further including optical path support means for positioning and supporting the optical device support means, the viewing means, and the target means along a common optical path.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |