US5155635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light admitting device
Assignee: Pentax Corp
•
Filing: 1991-03-28
•
Granted: 1992-10-13
•
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
2026-11-01 02:36
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.
References Cited (Backward Citations)
GB910410A
Cited
US3506355A
Cited
US3588492A
Cited
US3988057A
Cited
US4059916A
Cited
DE2827573A1
Cited
US4257084A
Cited
EP0171888A2
Cited
US4648690A
Cited
JPS61248924A
Cited
JPS62902A
Cited
DE3625767A1
Cited
JPS63206701A
Cited
JPS6411202A
Cited
JPS6472125A
Cited
US4893222A
Cited
JPH01281401A
Cited
DE3907805A1
Cited
DE4041803A1
Cited
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 |