US6018630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera viewfinder having a viewpoint detecting apparatus
Assignee: Canon Inc
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Filing: 1995-05-15
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Granted: 2000-01-25
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Expires: 2015-05-15
Abstract
Abstract A finder apparatus in which a viewpoint detecting apparatus is built in a finder unit and a light emitting device and a photosensing device constructing the viewpoint detecting apparatus are arranged in a space which is formed by notching a part of an eyepiece.
Inventors
- 👤 Takashi Arai
- 👤 Hirofumi Nakano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:00
CPC Classifications
G; G03; G03B; G03B13/00; G03B13/02; G03B2213/00; G03B2213/02; G03B2213/025
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
72 words
An image monitor apparatus comprising: an eyepiece having a lens; detecting means for detecting viewpoint information from light information reflected from an eye of an observer; and light guide means for guiding the light information indicative of a motion of the eye of said observer from said eyepiece to said detecting means, wherein said detecting means is arranged at a position adjacent to an edge portion of said lens of said eyepiece.
Claim 2
Dependent Claim
72 words
An image monitor apparatus comprising: an eyepiece having a lens; detecting means for detecting viewpoint information from light information reflected from an eye of an observer; and light guide means for guiding the light information indicative of a motion of the eye of said observer from said eyepiece to said detecting means, wherein said detecting means is arranged at a position adjacent to an edge portion of said lens of said eyepiece.
Claim 3
Dependent Claim
36 words
An apparatus according to claim 1, wherein said detecting means detects a position in a picture plane to which said observer observes on the basis of the light information indicative of the motion of said observer.
Claim 4
Dependent Claim
48 words
An apparatus according to claim 1, wherein said detecting means comprises: a light source to irradiate a light beam in a specific wavelength region toward the eye of said observer; and photosensing means for receiving said light reflection information formed by the light beam from said light source.
Claim 5
Dependent Claim
15 words
An apparatus according to claim 3, wherein said photosensing means comprises a charge coupled device.
Claim 6
Dependent Claim
44 words
An apparatus according to claim 1, further having display means for displaying an image, and wherein an optical lens for leading a light image corresponding to said image to said light guide means is provided between said display means and said light guide means.
Claim 7
Dependent Claim
15 words
An apparatus according to claim 1, wherein said light guide means comprises a dichroic mirror.
Claim 8
Dependent Claim
36 words
An apparatus according to claim 1, wherein said light guide means comprises a dichroic mirror which is arranged obliquely in the vertical direction for an optical axis of said eyepiece at an angle larger than 45°.
Claim 9
Dependent Claim
21 words
An apparatus according to claim 1, wherein said light guide means comprises a beam splitter constructed by a plurality of prisms.
Claim 10
Dependent Claim
38 words
An apparatus according to claim 1, wherein the edge portion is formed with a space thereon by cutting off a portion of said eyepiece, and wherein said detecting means is arranged in the space of the edge portion.
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) | 2003-01-24 | 2003-07-26 | 2004-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-01-24 | 2007-07-26 | 2008-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-01-24 | 2011-07-26 | 2012-01-25 | $7700.00 | Window Closed / Lapsed |