Patent US4525065A successfully refreshed from Google Patents.
US4525065A
Expired / Lapsed
US
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Method for controlling an exposure time in consideration of the reciprocity law failure of a photosensitive material
Assignee: Dainippon Screen Manufacturing Co Ltd
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Filing: 1983-06-13
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Granted: 1985-06-25
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Expires: 2003-06-13
Abstract
Abstract Controlling the exposure time in the reciprocity law failure range of a photosensitive material, in a picture reproducing machine, wherein the response time variation cause by variations is corrected according to the operational equation for the reciprocity law when the photosensitive material is in its linear range, by exposing said photosensitive material for a time t m in accordance with the relationship; ##EQU1## wherein T 0 is the correct exposure time in the absence of reciprocity law failure, M i is the desired reproduction scale and P is an empirically determined coefficient which is greater for enlargements than reductions.
Inventors
- 👤 Tsuneo Takagi
- 👤 Hiroyuki Yonehara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:53
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72; G03B27/722
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
104 words
A method for controlling the exposure time in the reciprocity law failure range of a photosensitive material, in a picture reproducing machine, wherein the response time variation cause by variations is corrected according to the operational equation for the reciprocity law when the photosensitive material is in its linear range, said method comprising exposing said photosensitive material for a time T m in accordance with the relationship; ##EQU11## wherein T 0 is the correct exposure time in the absence of reciprocity law failure, M i is the desired reproduction scale and P is an empirically determined coefficient which is greater for enlargements than reductions.
Claim 2
Independent Claim
104 words
A method for controlling the exposure time in the reciprocity law failure range of a photosensitive material, in a picture reproducing machine, wherein the response time variation cause by variations is corrected according to the operational equation for the reciprocity law when the photosensitive material is in its linear range, said method comprising exposing said photosensitive material for a time T m in accordance with the relationship; ##EQU11## wherein T 0 is the correct exposure time in the absence of reciprocity law failure, M i is the desired reproduction scale and P is an empirically determined coefficient which is greater for enlargements than reductions.
Claim 3
Independent Claim
112 words
A method for controlling the exposure time in the reciprocity law failure range of a photosensitive material in a picture reproducing machine, wherein the response time variation caused by variations is corrected according to the operational equation for the reciprocity law when the photosensitive material is in its linear range, said method comprising exposing said photosensitive material for a time T m in accordance with the relationship; ##EQU12## wherein T 0 is the correct exposure time in the absence of reciprocity law failure, m is the magnification of the reproduction, and P is an empirically determined correction coefficient that is greater for magnification greater than 1 then for magnification less than 1.
Claim 4
Independent Claim
112 words
A method for controlling the exposure time in the reciprocity law failure range of a photosensitive material in a picture reproducing machine, wherein the response time variation caused by variations is corrected according to the operational equation for the reciprocity law when the photosensitive material is in its linear range, said method comprising exposing said photosensitive material for a time T m in accordance with the relationship; ##EQU12## wherein T 0 is the correct exposure time in the absence of reciprocity law failure, m is the magnification of the reproduction, and P is an empirically determined correction coefficient that is greater for magnification greater than 1 then for magnification less than 1.
Claim 5
Independent Claim
136 words
A method for controlling the exposure time in the reciprocity law failure range of a photosensitive material, in a picture reproducing machine, wherein the response time variation cause by variations is corrected according to the operational equations for the reciprocity law when the photosensitive material is in its linear range, said method comprising empirically determining a plurality of values P for a given photographic emulsion that satisfy the relationship; ##EQU13## wherein T 0 is the correct exposure time in the absence of reciprocity law failure, T m is the correct exposure time corresponding to each of said value of P, and M i is the magnification, and then exposing a film of said emulsion at a time T m corresponding to the determined value of the coefficient P corresponding to the respective magnification M i .
Claim 6
Independent Claim
136 words
A method for controlling the exposure time in the reciprocity law failure range of a photosensitive material, in a picture reproducing machine, wherein the response time variation cause by variations is corrected according to the operational equations for the reciprocity law when the photosensitive material is in its linear range, said method comprising empirically determining a plurality of values P for a given photographic emulsion that satisfy the relationship; ##EQU13## wherein T 0 is the correct exposure time in the absence of reciprocity law failure, T m is the correct exposure time corresponding to each of said value of P, and M i is the magnification, and then exposing a film of said emulsion at a time T m corresponding to the determined value of the coefficient P corresponding to the respective magnification M i .
Claim 7
Independent Claim
129 words
A method for controlling the exposure time in the reciprocity law failure range of a photosensitive material, in a picture reproducing machine, wherein the response time variation caused by variations is corrected according to the operational equation for the reciprocity law when the photosensitive material is in its linear range, said method comprising empirically determining a plurality of correction coefficient values P' for a given photographic emulsion that satisfy the relationship; ##EQU14## wherein T 0 is the correct exposure time in the absence of reciprocity law failure, T m is the empirically determined correct exposure time under conditions of reciprocity law failure, and m is the magnification, and exposing a film of said emulsion at the time T m of the corresponding coefficient P' for the respective magnification m.
Claim 8
Independent Claim
129 words
A method for controlling the exposure time in the reciprocity law failure range of a photosensitive material, in a picture reproducing machine, wherein the response time variation caused by variations is corrected according to the operational equation for the reciprocity law when the photosensitive material is in its linear range, said method comprising empirically determining a plurality of correction coefficient values P' for a given photographic emulsion that satisfy the relationship; ##EQU14## wherein T 0 is the correct exposure time in the absence of reciprocity law failure, T m is the empirically determined correct exposure time under conditions of reciprocity law failure, and m is the magnification, and exposing a film of said emulsion at the time T m of the corresponding coefficient P' for the respective magnification m.
References Cited (Backward Citations)
US3443868A
Cited
US3873199A
Cited
US4206998A
Cited
US4025190A
Cited
US4068943A
Cited
US4149799A
Cited
US4175856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |