Patent US5155635A successfully refreshed from Google Patents.
US5155635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light admitting device
Assignee: Pentax Corp
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Filing: 1991-03-28
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Granted: 1992-10-13
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Expires: 2011-03-28
Abstract
Abstract A device for admitting light into a photodetecting apparatus such as an automatic white balance sensor includes a light-diffusing plate having a light admitting face for receiving light and a light issuing face from which diffuse light emerges. A reflecting layer is formed on at least a surface of the light-diffusing plate which is opposite the light admitting face.
Inventors
- 👤 Shinichi Kakiuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:47
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/02; G02B5/0205; G02B5/0236; G02B5/0273; G02B5/0284; H; H04; H04N; H04N23/00; H04N23/80; H04N23/84; H04N23/88
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
60 words
A light-admitting device, comprising: a light-diffusing member having a light-admitting face for receiving light, and a light-issuing face from which diffuse light emerges; and a reflecting layer provided on at least a first surface of said light-diffusing member which is opposite said light-admitting face, wherein the area of said light-admitting face is larger than the area of said light-issuing face.
Claim 2
Dependent Claim
60 words
A light-admitting device, comprising: a light-diffusing member having a light-admitting face for receiving light, and a light-issuing face from which diffuse light emerges; and a reflecting layer provided on at least a first surface of said light-diffusing member which is opposite said light-admitting face, wherein the area of said light-admitting face is larger than the area of said light-issuing face.
Claim 3
Dependent Claim
16 words
A device according to claim 1, wherein said first surface is inclined toward said light-issuing face.
Claim 4
Dependent Claim
19 words
A device according to claim 1, wherein said reflecting layer is disposed over a portion of said light-issuing face.
Claim 5
Dependent Claim
27 words
A device according to claim 1, wherein said reflecting layer is disposed over at least portions of surfaces of said light-diffusing member extending in three different planes.
Claim 6
Dependent Claim
27 words
A device according to claim 1, wherein said reflecting layer is disposed over at least portions of surfaces of said light-diffusing member extending in four different planes.
Claim 7
Dependent Claim
27 words
A device according to claim 1, wherein said reflecting layer is disposed over at least portions of surfaces of said light-diffusing member extending in five different planes.
Claim 8
Dependent Claim
23 words
A device according to claim 1, further comprising a light-shielding member disposed over a portion of said light-diffusing member adjacent said light-issuing face.
Claim 9
Dependent Claim
19 words
The device according to claim 1, wherein said light-issuing face lies in a plane transverse to said light-admitting face.
Claim 10
Dependent Claim
20 words
The device according to claim 8, wherein said light-issuing face lies in a plane substantially perpendicular to said light-admitting face.
Claim 11
Dependent Claim
17 words
The device according to claim 1, wherein said light-diffusing member is made of a milk-white acrylic resin.
Claim 12
Dependent Claim
13 words
The device according to claim 1, wherein said light-admitting face receives ambient light.
Claim 13
Dependent Claim
95 words
A light-admitting device, comprising: a light-diffusing member having a light-admitting face for receiving light, and a light-issuing face from which diffuse light emerges; a support housing for enclosing said light-diffusing member, said support housing having a window for transmitting said diffuse light emerging from said light-issuing face; and a reflecting layer provided between said light-diffusing member and said support housing so as to face at least a first surface of said light-diffusing member which is opposite said light-admitting face, wherein the area of said light-admitting face is larger than the area of said light-issuing face.
Claim 14
Dependent Claim
95 words
A light-admitting device, comprising: a light-diffusing member having a light-admitting face for receiving light, and a light-issuing face from which diffuse light emerges; a support housing for enclosing said light-diffusing member, said support housing having a window for transmitting said diffuse light emerging from said light-issuing face; and a reflecting layer provided between said light-diffusing member and said support housing so as to face at least a first surface of said light-diffusing member which is opposite said light-admitting face, wherein the area of said light-admitting face is larger than the area of said light-issuing face.
Claim 15
Dependent Claim
16 words
A device according to claim 12, wherein said reflecting layer is formed on said support housing.
Claim 16
Dependent Claim
16 words
A device according to claim 12, wherein said first surface is inclined toward said light-issuing face.
Claim 17
Dependent Claim
17 words
A device according to claim 12, wherein said reflecting layer faces a portion of said light-issuing face.
Claim 18
Dependent Claim
25 words
A device according to claim 12, wherein said reflecting layer faces at least portions of surfaces of said light-diffusing member extending in three different planes.
Claim 19
Dependent Claim
25 words
A device according to claim 12, wherein said reflecting layer faces at least portions of surfaces of said light-diffusing member extending in four different planes.
Claim 20
Dependent Claim
25 words
A device according to claim 12, wherein said reflecting layer faces at least portions of surfaces of said light-diffusing member extending in five different planes.
Claim 21
Dependent Claim
23 words
A device according to claim 12, further comprising a light-shielding member disposed over a portion of said light-diffusing member adjacent said light-issuing face.
Claim 22
Dependent Claim
19 words
The device according to claim 12, wherein said light-issuing face lies in a plane transverse to said light-admitting face.
Claim 23
Dependent Claim
20 words
The device according to claim 20, wherein said light-issuing face lies in a plane substantially perpendicular to said light-admitting face.
Claim 24
Dependent Claim
17 words
The device according to claim 12, wherein said light-diffusing member is made of a milk-white acrylic resin.
Claim 25
Dependent Claim
13 words
The device according to claim 12, wherein said light-admitting face receives ambient light.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-13 | 1996-04-13 | 1996-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-13 | 2000-04-13 | 2000-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-13 | 2004-04-13 | 2004-10-13 | $7700.00 | Window Closed / Lapsed |