US5231448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photometric apparatus for a camera
Assignee: Nikon Corp
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Filing: 1990-07-31
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Granted: 1993-07-27
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Expires: 2010-07-31
Abstract
Abstract A photometric apparatus of a camera for carrying out a multi-segmented photometry by receiving object light reflected at a film or the shutter, includes a plurality of photometric elements which are disposed at positions to respectively receive reflected light from the film or the shutter. The elements are segmented in accordance with each of regions segmenting the object field, corresponding to regions of the film or the shutter, and are arranged in parallel in a predetermined direction within a mirror box so as to respectively receive light reflected with diffusion angles less than a predetermined angle from respective reflection regions of the film or the shutter. Photometric lenses are respectively positioned between the reflection regions and the photometric elements, corresponding to the photometric elements, so as to respectively direct the object light reflected at the reflection regions to the plurality of photometric elements, and are arranged in parallel so as to restrict incidence of reflected light on the photometric elements from other reflection regions.
Inventors
- 👤 Toshihiro Sato
- 👤 Masaru Muramatsu
- 👤 Ken Utagawa
- 👤 Tadao Takagi
- 👤 Seiichi Yasukawa
- 👤 Shinichi Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:18
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/28; G02B7/34; G03; G03B; G03B7/00; G03B7/08; G03B7/099; G03B7/0993; G03B7/0997; G03B7/09971; G03B7/09974; G03B7/09979; G03B7/16; G03B7/17
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
103 words
A photometric element of a camera comprising: a body inclined at an acute angle with respect to a bottom surface of a camera body and having a lower surface substantially parallel to said surface of the camera body; a light receiving portion, being fixed to said body of said photometric element, for receiving object light reflected at a film or shutter after passing through a photographing lens; and a plurality of lead frames, being extended from surfaces of said body of said photometric element excluding the lower surface thereof, for transmitting electrical signals corresponding to received luminous quantities at said light receiving portion.
Claim 2
Dependent Claim
103 words
A photometric element of a camera comprising: a body inclined at an acute angle with respect to a bottom surface of a camera body and having a lower surface substantially parallel to said surface of the camera body; a light receiving portion, being fixed to said body of said photometric element, for receiving object light reflected at a film or shutter after passing through a photographing lens; and a plurality of lead frames, being extended from surfaces of said body of said photometric element excluding the lower surface thereof, for transmitting electrical signals corresponding to received luminous quantities at said light receiving portion.
Claim 3
Dependent Claim
50 words
A photometric element of a camera according to claim 5, wherein said signal transmitting lead frames are extended from an upper surface of said body of said photometric element and from at least one end surface of said body of said photometric element in a transverse direction of the camera.
Claim 4
Dependent Claim
64 words
A photometric element of a camera according to claim 1, wherein a pair of positioning lead frames for positioning and fixing said body of said photometric element with respect to the camera body are extended from opposite end surfaces of said photometric element transverse to the camera at positions displaced either upwardly or downwardly from the center of said body of said photometric element.
Claim 5
Dependent Claim
68 words
A photometric element of a camera according to claim 1, wherein said light receiving portion is segmented into a plurality of portions so as to respectively receive reflected light from a plurality of regions of the film or the shutter, these light receiving portions being respectively fixed to said body of said photometric element at positions displaced downwardly from the center of said body of said photometric element.
Claim 6
Dependent Claim
124 words
A photometric apparatus for a single-lens reflex camera comprising: five photometric elements integrally retained to the camera, said five photometric elements forming three parts which are aligned in a predetermined direction within a mirror box of the single-lens reflex camera so that each of two end parts has two photometric elements and a central part has a single photometric element; and three photometric lenses corresponding to said three parts, respectively, said three photometric lenses being integrally retained to the camera and aligned in said predetermined direction within the mirror box such that five luminous fluxes from five regions in an object field are reflected at a film or a shutter and are incident on said five photometric elements, respectively, via said three photometric lenses.
Claim 7
Dependent Claim
124 words
A photometric apparatus for a single-lens reflex camera comprising: five photometric elements integrally retained to the camera, said five photometric elements forming three parts which are aligned in a predetermined direction within a mirror box of the single-lens reflex camera so that each of two end parts has two photometric elements and a central part has a single photometric element; and three photometric lenses corresponding to said three parts, respectively, said three photometric lenses being integrally retained to the camera and aligned in said predetermined direction within the mirror box such that five luminous fluxes from five regions in an object field are reflected at a film or a shutter and are incident on said five photometric elements, respectively, via said three photometric lenses.
Claim 8
Dependent Claim
40 words
A photometric apparatus of a camera according to claim 5, wherein said five photometric elements and said three photometric lenses are respectively arranged at the bottom portion of said mirror box in parallel in a direction transverse to the camera.
Claim 9
Dependent Claim
43 words
A photometric apparatus of a camera according to claim 5, wherein said five photometric elements and said three photometric lenses are respectively arranged within said mirror box in parallel along a side wall of the camera in a direction vertical to the camera.
Claim 10
Dependent Claim
99 words
A photometric element of a camera comprising: a body inclined at an acute angle with respect to an upper surface of an autofocus sensor module disposed at a bottom portion of a camera body; a light receiving portion, being fixed to said body of said photometric element, for receiving object light reflected at a film or shutter after passing through a photographing lens; and a plurality of lead frames, being extended from surfaces of said body of said photometric element excluding the lower surface thereof, for transmitting electrical signals corresponding to received luminous quantities at said light receiving portion.
Claim 11
Dependent Claim
99 words
A photometric element of a camera comprising: a body inclined at an acute angle with respect to an upper surface of an autofocus sensor module disposed at a bottom portion of a camera body; a light receiving portion, being fixed to said body of said photometric element, for receiving object light reflected at a film or shutter after passing through a photographing lens; and a plurality of lead frames, being extended from surfaces of said body of said photometric element excluding the lower surface thereof, for transmitting electrical signals corresponding to received luminous quantities at said light receiving portion.
Claim 12
Dependent Claim
50 words
A photometric element of a camera according to claim 8, wherein said signal transmitting lead frames are extended from an upper surface of said body of said photometric element and from at least one end surface of said body of said photometric element in a transverse direction of the camera.
Claim 13
Dependent Claim
64 words
A photometric element of a camera according to claim 8, wherein a pair of positioning lead frames for positioning and fixing said body of said photometric element with respect to the camera body are extended from opposite end surfaces of said photometric element transverse to the camera at positions displaced either upwardly or downwardly from the center of said body of said photometric element.
Claim 14
Dependent Claim
75 words
A photometric element of a camera according to claim 8, wherein said light receiving portion is segmented into a plurality of portions so as to respectively receive reflected light from a plurality of regions reflected light from a plurality of regions of the film or the shutter, these light receiving portions being respectively fixed to said body of said photometric element at positions displaced downwardly from the center of said body of said photometric element.
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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) | 1996-07-26 | 1997-01-25 | 1997-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-26 | 2001-01-25 | 2001-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-26 | 2005-01-25 | 2005-07-27 | $7700.00 | Window Closed / Lapsed |