US5155516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
View finder optical system with eye direction detection device
Assignee: Pentax Corp
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Filing: 1990-10-18
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Granted: 1992-10-13
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Expires: 2010-10-18
Abstract
Abstract A view finder optical system including a window of an eye piece portion comprising an eye cup having a contact surface, a shape of the contact surface being made so as to incline an axis of the lens with respect to an axis of the eye piece. The shape of the contact surface is curved corresponding to the lens's shape. The contact surface is made so as to conform to a lens of glasses.
Inventors
- 👤 Osamu Shindo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:44
CPC Classifications
G; G03; G03B; G03B13/00; G03B13/02; G03B2213/00; G03B2213/02; G03B2213/025
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
90 words
A view finder optical system of a camera including a window for an eye piece portion comprising an eye cup having a contact surface; said contact surface being made so as to conform to a lens of eyeglasses, said contact surface being shaped so as to incline an axis of said lens with respect to an axis of said eye piece portion; said camera has means for emitting a light beam to an eye through said eye piece portion, and means for detecting a reflected light beam from the eye.
Claim 2
Dependent Claim
90 words
A view finder optical system of a camera including a window for an eye piece portion comprising an eye cup having a contact surface; said contact surface being made so as to conform to a lens of eyeglasses, said contact surface being shaped so as to incline an axis of said lens with respect to an axis of said eye piece portion; said camera has means for emitting a light beam to an eye through said eye piece portion, and means for detecting a reflected light beam from the eye.
Claim 3
Dependent Claim
23 words
A view finder optical system according to claim 1, wherein said contact surface is concave to incline the lens of the eyeglasses downwardly.
Claim 4
Dependent Claim
33 words
A view finder optical system according to claim 1, wherein said contact surface has a concave surface; said concave surface is directed leftwardly or rightwardly in accordance with the lens of the eyeglasses.
Claim 5
Dependent Claim
107 words
A view finder optical system of a camera including a window for an eye piece portion comprising an eye cup having a contact surface; said contact surface being made so as to conform to a lens of eyeglasses, said contact surface being shaped so as to incline an axis of said lens with respect to an axis of said eye piece portion; said camera has an eye direction detecting device, said device includes a projection optical system for projecting parallel light to an eye through said eye piece portion, and a receiving optical system including a receiving element, and said device detecting reflected light from the eye.
Claim 6
Dependent Claim
107 words
A view finder optical system of a camera including a window for an eye piece portion comprising an eye cup having a contact surface; said contact surface being made so as to conform to a lens of eyeglasses, said contact surface being shaped so as to incline an axis of said lens with respect to an axis of said eye piece portion; said camera has an eye direction detecting device, said device includes a projection optical system for projecting parallel light to an eye through said eye piece portion, and a receiving optical system including a receiving element, and said device detecting reflected light from the eye.
Claim 7
Dependent Claim
23 words
A view finder optical system according to claim 4, wherein said contact surface is curved to conform to the shape of said lens.
Claim 8
Dependent Claim
19 words
A view finder optical system according to claim 4, wherein said contact surface is concave to incline said lens.
Claim 9
Dependent Claim
92 words
An optical system including a window for an eye piece portion comprising: an eye cup having a contact surface, said contact surface being shaped so as to conform to a lens of eyeglasses and so that an axis of said lens is inclined with respect to an axis of said eye piece portion; an eye direction detecting device including a projection optical system for projecting parallel light to an eye through said eye piece portion, and a receiving optical system having a receiving element, said device detecting reflected light from the eye.
Claim 10
Dependent Claim
92 words
An optical system including a window for an eye piece portion comprising: an eye cup having a contact surface, said contact surface being shaped so as to conform to a lens of eyeglasses and so that an axis of said lens is inclined with respect to an axis of said eye piece portion; an eye direction detecting device including a projection optical system for projecting parallel light to an eye through said eye piece portion, and a receiving optical system having a receiving element, said device detecting reflected light from the eye.
Claim 11
Dependent Claim
21 words
An optical system according to claim 7, wherein said contact surface is curved to conform to the shape of said lens.
Claim 12
Dependent Claim
17 words
An optical system according to claim 7, wherein said contact surface is concave to incline said lens.
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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 |