US4769677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photometering method in photographic printer
Assignee: Fujifilm Holdings Corp
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Filing: 1987-04-13
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Granted: 1988-09-06
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Expires: 2007-04-13
Abstract
Abstract A photometering method in a photographic printer where color balance and density are adjusted by a color compensation filter and where a photoprint may be made by irradiating light on an original film through a mirror box, including the steps of: setting the color compensation filter to a photometering position so as to allow the light quantity per unit area of an image information detector including an image sensor to be within a predetermined area, photometering the original film with the image information detector, and then setting the color compensation filter to an exposure position for automatic photoprinting.
Inventors
- 👤 Fumio Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:33
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72; G03B27/73; G03B27/735
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
104 words
A photometering method in a photographic printer wherein color balance and density are adjusted by means of a color compensation filter and wherein a photoprint may be made by irradiating light on an original film through a mirror box, comprising the steps of: setting the color compensation filter to a photometering position so as to allow the light quantity per unit area of an image information detecting means comprising an image sensor to be within a predetermined area, photometering the original film by means of the image information detecting means, and then setting the color compensation filter to an exposure position for automatic photoprinting.
Claim 2
Dependent Claim
104 words
A photometering method in a photographic printer wherein color balance and density are adjusted by means of a color compensation filter and wherein a photoprint may be made by irradiating light on an original film through a mirror box, comprising the steps of: setting the color compensation filter to a photometering position so as to allow the light quantity per unit area of an image information detecting means comprising an image sensor to be within a predetermined area, photometering the original film by means of the image information detecting means, and then setting the color compensation filter to an exposure position for automatic photoprinting.
Claim 3
Dependent Claim
30 words
A photometering method in a photographic printer as set forth in claim 1, wherein the color compensation filter is automatically set to the photometering position before photometering the original film.
Claim 4
Dependent Claim
36 words
A photometering method in a photographic printer as set forth in claim 1, wherein the storage time of the image sensor is set to a predetermined value after exchanging the mirror box for another mirror box.
Claim 5
Dependent Claim
34 words
A photometering method in a photographic printer as set forth in claim 3, wherein the storage time of the image sensor is re-set after the color compensation filter is set to the photometering position.
Claim 6
Dependent Claim
40 words
A photometering method in a photographic printer as set forth in claim 4, wherein the image information on the original film is detected by the image sensor after the storage time is set so as to determine the exposure amount.
Claim 7
Dependent Claim
22 words
A photometering method in a photographic printer as set forth in claim 1, wherein the image sensor is a two-dimensional image sensor.
Claim 8
Dependent Claim
23 words
A photometering method in a photographic printer as set forth in claim 2, wherein the color compensation filter consists of three color filters.
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) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |