US5214465A
Expired / Lapsed
US
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Exposure calculating apparatus
Assignee: Minolta Co Ltd
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Filing: 1992-04-13
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Granted: 1993-05-25
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Expires: 2012-04-13
Abstract
Abstract The disclosure relates to an exposure calculation apparatus which includes plural light measuring devices for measuring lights incident on a plurality of regions of a photographing image plane and outputting measured data of the lights; plural devices for detecting the focusing conditions of objects present in a plurality of the regions of the photographing image plane and outputting data on the focusing conditions; a position detecting devices for detecting the position which a main object occupies in the photographing image plane on the data on the focusing condition outputted from the focusing conditions detecting devices; calculation device for making a plurality of calculations each of which is made depending on at least one of the data of measured lighs outputted from the light measuring devices; and selecting devices for selecting one of the plurality of calculations on the position detected by the position detecting devices and the data on the focusing conditions of the position.
Inventors
- 👤 Yasuteru Yamano
- 👤 Takehiro Katoh
- 👤 Akihiko Fujino
- 👤 Kenji Tsuji
- 👤 Shuji Izumi
- 👤 Masaaki Nakai
- 👤 Nobuyuki Taniguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:20
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/28; G02B7/36; G03; G03B; G03B7/00; G03B7/08; G03B7/099; G03B7/0993; G03B7/0997; G03B7/09979
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
132 words
An exposure calculation apparatus comprising: means for measuring light incident on a plurality of light measuring regions of a photographing image plane to generate a plurality of signals representative of the measured light; means for detecting focusing condition of a photo-taking lens with respect to an object present in a focus detection area; means for calculating magnification related to an object distance on the basis of the detected focusing condition; means for performing a plurality of calculations, each of which is performed on the basis of at least one of the signals representative of the measured light generated by the measuring means; and means for selecting one of the plurality of calculations suitable for said magnification when said magnification exists, and for selecting the particular calculation when said magnification goes not exist.
Claim 2
Dependent Claim
132 words
An exposure calculation apparatus comprising: means for measuring light incident on a plurality of light measuring regions of a photographing image plane to generate a plurality of signals representative of the measured light; means for detecting focusing condition of a photo-taking lens with respect to an object present in a focus detection area; means for calculating magnification related to an object distance on the basis of the detected focusing condition; means for performing a plurality of calculations, each of which is performed on the basis of at least one of the signals representative of the measured light generated by the measuring means; and means for selecting one of the plurality of calculations suitable for said magnification when said magnification exists, and for selecting the particular calculation when said magnification goes not exist.
Claim 3
Dependent Claim
166 words
An exposure calculation apparatus comprising: means for measuring light incident on a plurality of light measuring regions of a photographing image plane to generate a plurality of signals representative of the measured light; means for detecting focusing condition of a photo-taking lens with respect to an object present in a focus detection area; means for calculating information related to an object distance on the basis of the detected focusing condition; means for performing a plurality of calculations, each of which is performed on the basis of at least one of the signals representative of the measured light generated by the measuring means; means for selecting one of the plurality of calculations suitable for said information when said information exists, and for selecting the particular calculation when said information does not exist; and means for judging whether the detection of focusing condition is possible or not, and wherein the selecting means selects the particular calculation when the judging means judges the detection of focusing condition is impossible.
Claim 4
Dependent Claim
166 words
An exposure calculation apparatus comprising: means for measuring light incident on a plurality of light measuring regions of a photographing image plane to generate a plurality of signals representative of the measured light; means for detecting focusing condition of a photo-taking lens with respect to an object present in a focus detection area; means for calculating information related to an object distance on the basis of the detected focusing condition; means for performing a plurality of calculations, each of which is performed on the basis of at least one of the signals representative of the measured light generated by the measuring means; means for selecting one of the plurality of calculations suitable for said information when said information exists, and for selecting the particular calculation when said information does not exist; and means for judging whether the detection of focusing condition is possible or not, and wherein the selecting means selects the particular calculation when the judging means judges the detection of focusing condition is impossible.
Claim 5
Dependent Claim
132 words
An exposure calculation apparatus comprising: means for measuring light incident on a plurality of light measuring regions of a photographing image plane to generate a plurality of signals representative of the measured light; means for detecting focusing condition of a photo-taking lens with respect to an object presenting a focus condition region; means for performing a plurality of calculations, each of which is performed on the basis of at least one of the signals representative of the measured light generated by the measuring means. means for predicting information about the detecting means at in-focus condition; means for judging whether the in-focus condition is obtained or not; and means for selecting one of the plurality of calculations suitable for the predetermined information when the judging means judges the in-focus condition is not obtained.
Claim 6
Dependent Claim
132 words
An exposure calculation apparatus comprising: means for measuring light incident on a plurality of light measuring regions of a photographing image plane to generate a plurality of signals representative of the measured light; means for detecting focusing condition of a photo-taking lens with respect to an object presenting a focus condition region; means for performing a plurality of calculations, each of which is performed on the basis of at least one of the signals representative of the measured light generated by the measuring means. means for predicting information about the detecting means at in-focus condition; means for judging whether the in-focus condition is obtained or not; and means for selecting one of the plurality of calculations suitable for the predetermined information when the judging means judges the in-focus condition is not obtained.
Claim 7
Dependent Claim
29 words
An exposure calculation apparatus as claimed in claim 3, wherein the selecting means selects one of the plurality of calculations suitable for a detection result of the detecting means.
Claim 8
Dependent Claim
27 words
An exposure calculation apparatus as claimed in claim 3, wherein the predicted information is magnification calculated on the basis of a detection result of the detecting means.
Claim 9
Dependent Claim
130 words
An exposure calculation apparatus comprising: means for measuring light incident on a plurality of light measuring regions of a photographing image plane to generate a plurality of signals representative of the measured light; means for detecting defocus amount of a photo-taking lens with respect to an object presenting a focus condition region; means for inputting a present focusing lens position; means for performing a plurality of calculations, each of which is performed on the basis of at least one of the signals representative of the measured light generated by the measuring means; means for calculating a distance to the object on the basis of the defocus amount and the present focusing lens position; and means for selecting one of the plurality of calculations suitable for a distance to the object.
Claim 10
Dependent Claim
130 words
An exposure calculation apparatus comprising: means for measuring light incident on a plurality of light measuring regions of a photographing image plane to generate a plurality of signals representative of the measured light; means for detecting defocus amount of a photo-taking lens with respect to an object presenting a focus condition region; means for inputting a present focusing lens position; means for performing a plurality of calculations, each of which is performed on the basis of at least one of the signals representative of the measured light generated by the measuring means; means for calculating a distance to the object on the basis of the defocus amount and the present focusing lens position; and means for selecting one of the plurality of calculations suitable for a distance to the object.
Claim 11
Dependent Claim
39 words
An exposure calculation apparatus as claimed in claim 6, wherein the calculating means further calculates magnification on the basis of the distance to the object, and the selecting means performs it selection operation on the basis of the magnification.
Claim 12
Dependent Claim
100 words
An exposure calculation apparatus comprising: means for measuring light incident on a plurality of light measuring regions of a photographing image plane to generate a plurality of signals representative of the measured light; means for calculating an object distance; means for performing a plurality of calculations, each of which is performed on the basis of at least one of the signals representative of the measured light generated by the measuring means; means for detecting reliability of the calculated object distance; and means for selecting the particular calculation when the calculated object distance has no reliability among the plurality of calculations.
Claim 13
Dependent Claim
100 words
An exposure calculation apparatus comprising: means for measuring light incident on a plurality of light measuring regions of a photographing image plane to generate a plurality of signals representative of the measured light; means for calculating an object distance; means for performing a plurality of calculations, each of which is performed on the basis of at least one of the signals representative of the measured light generated by the measuring means; means for detecting reliability of the calculated object distance; and means for selecting the particular calculation when the calculated object distance has no reliability among the plurality of calculations.
Claim 14
Dependent Claim
26 words
An exposure calculation apparatus as claimed in claim 8, wherein the detecting means detects reliability on the basis of a focal length of a photo-taking lens.
Claim 15
Dependent Claim
47 words
An exposure calculation apparatus as claimed in claim 8, further comprising means for calculating magnification on the basis of the calculated object distance and a focal length of a photo-taking lens, and the selecting means selects one of the plurality of calculations suitable for the calculated magnification.
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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) | 1996-05-24 | 1996-11-23 | 1997-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-24 | 2000-11-23 | 2001-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-24 | 2004-11-23 | 2005-05-25 | $7700.00 | Window Closed / Lapsed |