Patent US4055761A successfully refreshed from Google Patents.
US4055761A
Expired / Lapsed
US
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Light receiving device for photoelectric conversion element
Assignee: Nikon Corp
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Filing: 1976-03-04
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Granted: 1977-10-25
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Expires: 1996-03-04
Abstract
Abstract A light receiving device for a photoelectric conversion element in an exposure meter etc., wherein a light converging optical system and a photoelectric conversion element are held in intimate contact with a transparent elastic sheet interposed therebetween.
Inventors
- 👤 Jun Shimomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:05
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/02; G01J1/04; G01J1/0407; G01J1/0411; G01J1/42; G01J1/4209; G01J1/4214; G01J1/0204; G01J1/0209
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
121 words
A light receiving device for a photoelectric conversion element, comprising: a. transparent covering means for covering said conversion element to exclude presence of air between said conversion element and said covering means; b. a transparent, elastic sheet positioned on said covering means; c. a light converging optical system for converging light beams incident on said photoelectric conversion element, said optical system including a lens positioned on said sheet, said lens, said sheet and said covering means being similar in refractive index; and d. means for tightening together said covering means, said sheet and said lens whereby air is excluded from between the contacting surfaces of said covering means and said sheet, and the contacting surfaces of said sheet and said lens.
Claim 2
Dependent Claim
121 words
A light receiving device for a photoelectric conversion element, comprising: a. transparent covering means for covering said conversion element to exclude presence of air between said conversion element and said covering means; b. a transparent, elastic sheet positioned on said covering means; c. a light converging optical system for converging light beams incident on said photoelectric conversion element, said optical system including a lens positioned on said sheet, said lens, said sheet and said covering means being similar in refractive index; and d. means for tightening together said covering means, said sheet and said lens whereby air is excluded from between the contacting surfaces of said covering means and said sheet, and the contacting surfaces of said sheet and said lens.
Claim 3
Dependent Claim
26 words
A light receiving device according to claim 1, wherein said lens is a convergent one of which the front surface remote from said sheet is convex.
Claim 4
Dependent Claim
20 words
A light receiving device according to claim 2, wherein the rear surface of said lens contacting said sheet is flat.
Claim 5
Dependent Claim
29 words
The light receiving device as claimed in claim 1, wherein said lens has a flanged portion on the circumference thereof, said flanged portion being engaged with said tightening means.
Claim 6
Dependent Claim
102 words
A light receiving device as claimed in claim 4, further comprising a first casing accommodating said lens and having an engaging portion inwardly projecting from the inner wall thereof, said engaging portion being engaged with the flanged portion of said lens, and a second casing having an engaging portion inwardly projecting from the inner wall thereof so as to be engaged with said photoelectric conversion element, and means whereby said engaging portions may be urged towards one another so that said lens, said sheet, and said photoelectric conversion element are tightly held between said engaging portions of said first and second casings.
Claim 7
Dependent Claim
34 words
A light receiving device as claimed in claim 5, wherein said means whereby said engaging portions may be urged towards one another are constituted by mutually engaging threads on said first and second casings.
Claim 8
Dependent Claim
42 words
A light receiving device as claimed in claim 1, wherein said photoelectric conversion element includes a photoelectric substance and said covering means includes a filter underlying said sheet and a resin material filling the space between said photoelectric substance and said filer.
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) | 1980-10-24 | 1981-04-25 | 1981-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-24 | 1985-04-25 | 1985-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-24 | 1989-04-25 | 1989-10-25 | $7700.00 | Window Closed / Lapsed |