Patent US4839685A successfully refreshed from Google Patents.
US4839685A
Expired / Lapsed
US
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Light receiving element for a rangefinder
Assignee: Fujifilm Holdings Corp
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Filing: 1987-11-12
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Granted: 1989-06-13
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Expires: 2007-11-12
Abstract
Abstract A light receiving element of a rangefinding device, for example for use in a camera, comprises a photoconversion light receiving element of which the light receiving surface is provided with a thin saw-toothed masking layer of aluminum directly deposited thereon by vacuum evaporation.
Inventors
- 👤 Minoru Ishiguro
- 👤 Minoru Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:59
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/48; G01S7/481; G01S7/4816; G02; G02B; G02B7/00; G02B7/28; G02B7/30; G02B7/32; G01S17/00; G01S17/02; G01S17/06; G01S17/46; G01S17/48
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
95 words
A light receiving element for use in a rangefinding device which comprises light projecting means for projecting a light toward an object to be measured and light receiving means for receiving a light reflected from said object, said light receiving element comprising a light detecting member and a saw-toothed mask having sharp teeth, said mask comprising a thin opaque aluminum layer on a light receiving surface of said light detecting member formed directly on said light receiving surface by means of vacuum evaporation, and a layer of exposed photo-resistive material on only said aluminum layer.
Claim 2
Dependent Claim
95 words
A light receiving element for use in a rangefinding device which comprises light projecting means for projecting a light toward an object to be measured and light receiving means for receiving a light reflected from said object, said light receiving element comprising a light detecting member and a saw-toothed mask having sharp teeth, said mask comprising a thin opaque aluminum layer on a light receiving surface of said light detecting member formed directly on said light receiving surface by means of vacuum evaporation, and a layer of exposed photo-resistive material on only said aluminum layer.
Claim 3
Dependent Claim
19 words
A light receiving element as defined in claim 1, wherein said light detecting member is a photoelectric conversion element.
References Cited (Backward Citations)
US4339185A
Cited
US4547074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |