Patent FR775986A successfully refreshed from Google Patents.
Patent US4715690A successfully refreshed from Google Patents.
US4715690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic screen
Assignee: Konica Minolta Inc
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Filing: 1986-12-31
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Granted: 1987-12-29
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Expires: 2006-12-31
Abstract
Abstract There is presented an optical screen suitable for taking a picture by placing it between the object and a photosensitive material. The optical screen has a specific means for controlling the difference in transmission density in an optically heterogeneous pattern and/or the specific area of the lower transmission density portions, typically an electrochromic display device. By use of such a single optical screen having a variable optically heterogeneous pattern, cumbersome operations for displacing one screen for another in the prior art can be obviated.
Inventors
- 👤 Kaoru Onodera
- 👤 Satoru Hohnishi
- 👤 Kazuyuki Kobayashi
- 👤 Kazuo Shiozawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:44
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/02; G03B; G03B7/00; G03B7/28
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
127 words
A light transmitting electrochromic optical screen for photographic use, said screen being arranged to pass light prior to the light exposing a photosensitive material, comprising: an optically heterogenerous pattern consisting of regions of relatively higher light transmission density and regions of relatively lower light transmission density, and means for variably defining predetermined areas on said screen as said regions of higher and lower light transmission density by varying at least one of: (i) the area of both said higher and lower light transmission density regions, and (ii) the transmission density of said region of relatively higher light transmission density, to thereby vary the pattern of said relatively higher and lower light transmission density regions of said screen and thereby varying the light transmission characteristics of said screen.
Claim 2
Dependent Claim
127 words
A light transmitting electrochromic optical screen for photographic use, said screen being arranged to pass light prior to the light exposing a photosensitive material, comprising: an optically heterogenerous pattern consisting of regions of relatively higher light transmission density and regions of relatively lower light transmission density, and means for variably defining predetermined areas on said screen as said regions of higher and lower light transmission density by varying at least one of: (i) the area of both said higher and lower light transmission density regions, and (ii) the transmission density of said region of relatively higher light transmission density, to thereby vary the pattern of said relatively higher and lower light transmission density regions of said screen and thereby varying the light transmission characteristics of said screen.
Claim 3
Dependent Claim
44 words
The screen according to claim 1, wherein the screen has a repeating pattern, the number of units of the repeating pattern being at least 200×S -1/2 /mm, wherein S is the size of a picture plane of the photosensitive material measured in square millimeters.
Claim 4
Dependent Claim
40 words
The screen according to claim 1, wherein said screen further comprises a sheet for uniformly polarizing photographic light and a sheet having a polarized section and non-polarized section, one of said sheets being arranged to rotate around the optical axis.
Claim 5
Dependent Claim
13 words
The screen according to claim 1, wherein the screen is a rubber sheet.
Claim 6
Dependent Claim
23 words
The screen according to claim 1, wherein the screen further comprises a transparent plate having a thickened region of relatively higher transmission density.
Claim 7
Dependent Claim
213 words
A light transmitting optical screen for photographic use, said screen being arranged to pass light prior to the light exposing a photosensitive material, comprising: an optically heterogenerous pattern consisting of regions of relatively higher light transmission density and regions of relatively lower light transmission density, and means for variably defining predetermined areas on said screen as said regions of higher and lower light transmission density by varying at least one of: (i) the area of both said higher and lower light transmission density regions, and (ii) the transmission density of said region of relatively higher light transmission density, to thereby vary the pattern of said relatively higher and lower light transmission density regions of said screen and thereby varying the light transmission characteristics of said screen; wherein said screen comprises an electrochromic display device provided on a transparent substrate, said display device having an electrochromic film sandwiched between two transparent electrode containing layers, said two electrode containing layers including a plurality of electrodes arranged to form a plurality of overlapping regions where electrodes of each layer overlap, and non-overlapping regions, said overlapping regions having a higher transmission density than said non-overlapping regions, the transmission density of said overlapping regions being variable as a result of the passage of electric current through said electrodes.
Claim 8
Dependent Claim
213 words
A light transmitting optical screen for photographic use, said screen being arranged to pass light prior to the light exposing a photosensitive material, comprising: an optically heterogenerous pattern consisting of regions of relatively higher light transmission density and regions of relatively lower light transmission density, and means for variably defining predetermined areas on said screen as said regions of higher and lower light transmission density by varying at least one of: (i) the area of both said higher and lower light transmission density regions, and (ii) the transmission density of said region of relatively higher light transmission density, to thereby vary the pattern of said relatively higher and lower light transmission density regions of said screen and thereby varying the light transmission characteristics of said screen; wherein said screen comprises an electrochromic display device provided on a transparent substrate, said display device having an electrochromic film sandwiched between two transparent electrode containing layers, said two electrode containing layers including a plurality of electrodes arranged to form a plurality of overlapping regions where electrodes of each layer overlap, and non-overlapping regions, said overlapping regions having a higher transmission density than said non-overlapping regions, the transmission density of said overlapping regions being variable as a result of the passage of electric current through said electrodes.
Claim 9
Dependent Claim
27 words
The screen according to claim 6, wherein the difference in transmission density between said overlapping and non-overlapping regions is variable within the range from 0.1 to 3.0.
Claim 10
Dependent Claim
25 words
The screen according to claim 6 or claim 7, wherein the area of the non-overlapping region is variable within the range from 10 to 90%.
Claim 11
Dependent Claim
21 words
The screen according to claim 6, wherein the electrodes are arranged regularly in the form of a checker or dot pattern.
Claim 12
Dependent Claim
135 words
An optical screen for use in exposing a photosensitive material to light, comprising an electrochromic display device provided on a transparent substrate, said display device having an electrochromic film sandwiched between two transparent electrode containing layers, said two electrode containing layers including a plurality of electrodes arranged to form a plurality of overlapping regions where electrodes of each layer overlap, and non-overlapping regions, said overlapping regions having a higher transmission density that said nonoverlapping regions, the transmission density of said overlapping regions being variable as a result of the passage of electric current through said electrodes, and wherein the screen has a repeating pattern, the number of units of the repeating pattern being at least 200×S -1/2 /mm, wherein S is the size of a picture plane of the photosensitive material measured in square millimeters.
Claim 13
Dependent Claim
135 words
An optical screen for use in exposing a photosensitive material to light, comprising an electrochromic display device provided on a transparent substrate, said display device having an electrochromic film sandwiched between two transparent electrode containing layers, said two electrode containing layers including a plurality of electrodes arranged to form a plurality of overlapping regions where electrodes of each layer overlap, and non-overlapping regions, said overlapping regions having a higher transmission density that said nonoverlapping regions, the transmission density of said overlapping regions being variable as a result of the passage of electric current through said electrodes, and wherein the screen has a repeating pattern, the number of units of the repeating pattern being at least 200×S -1/2 /mm, wherein S is the size of a picture plane of the photosensitive material measured in square millimeters.
Claim 14
Independent Claim
131 words
A method of transmitting light corresponding to an image onto a photosensitive material comprising: allowing light to contact said photosensitive material through a light transmitting electrochromic optical screen to thereby expose said photosensitive material to said light after said light passes through said screen, said optical screen comprising an optically heterogenerous pattern consisting of regions of relatively higher light transmission density and regions of relatively lower light transmission density, and varying at least one of: (i) the area of both said higher and lower light transmission density regions, and (ii) the transmission density of said region of relatively higher light transmission density, to thereby vary the pattern of said relatively higher and lower light transmission density regions of said screen and to thereby vary the light transmission characteristic of said screen.
Claim 15
Independent Claim
131 words
A method of transmitting light corresponding to an image onto a photosensitive material comprising: allowing light to contact said photosensitive material through a light transmitting electrochromic optical screen to thereby expose said photosensitive material to said light after said light passes through said screen, said optical screen comprising an optically heterogenerous pattern consisting of regions of relatively higher light transmission density and regions of relatively lower light transmission density, and varying at least one of: (i) the area of both said higher and lower light transmission density regions, and (ii) the transmission density of said region of relatively higher light transmission density, to thereby vary the pattern of said relatively higher and lower light transmission density regions of said screen and to thereby vary the light transmission characteristic of said screen.
Claim 16
Independent Claim
202 words
A method of transmitting light corresponding to an image onto a photosensitive material comprising: allowing light to contact said photosensitive material through a light transmitting optical screen to thereby expose said photosensitive material to said light after said light passes through said screen, said optical screen comprising an optically heterogenerous pattern consisting of regions of relatively higher light transmission density and regions of relatively lower light transmission density, and varying at least one of: (i) the area of both said higher and lower light transmission density regions, and (ii) the transmission density of said region of relatively higher light transmission density, to thereby vary the pattern of said relatively higher and lower light transmission density regions of said screen and to thereby vary the light transmission characteristic of said screen; wherein said screen comprises an electrochromic display device provided on a transparent substrate, said device having an electrochromic film sandwiched between two transparent electrode containing layers, said electrodes arranged to form a plurality of overlapping regions and non-overlapping regions, said overlapping regions having a higher transmission density than said non-overlapping regions, the transmission density of said overlapping regions being variable as a result of the passage of electric current through said electrodes.
Claim 17
Independent Claim
202 words
A method of transmitting light corresponding to an image onto a photosensitive material comprising: allowing light to contact said photosensitive material through a light transmitting optical screen to thereby expose said photosensitive material to said light after said light passes through said screen, said optical screen comprising an optically heterogenerous pattern consisting of regions of relatively higher light transmission density and regions of relatively lower light transmission density, and varying at least one of: (i) the area of both said higher and lower light transmission density regions, and (ii) the transmission density of said region of relatively higher light transmission density, to thereby vary the pattern of said relatively higher and lower light transmission density regions of said screen and to thereby vary the light transmission characteristic of said screen; wherein said screen comprises an electrochromic display device provided on a transparent substrate, said device having an electrochromic film sandwiched between two transparent electrode containing layers, said electrodes arranged to form a plurality of overlapping regions and non-overlapping regions, said overlapping regions having a higher transmission density than said non-overlapping regions, the transmission density of said overlapping regions being variable as a result of the passage of electric current through said electrodes.
Claim 18
Dependent Claim
44 words
The method according to claim 12, wherein the screen has a repeating pattern, the number of units of the repeating pattern being at least 200×S -1/2 /mm, wherein S is the size of a picture plane on the photosensitive material measured in square millimeters.
Claim 19
Independent Claim
253 words
A method of transmitting light corresponding to an image onto a photosensitive material comprising: allowing light to contact said photosensitive material through a light transmitting optical screen to thereby expose said photosensitive material to said light after said light passes through said screen, said optical screen comprising an optically heterogenerous pattern consisting of regions of relatively higher light transmission density and regions of relatively lower light transmission density, and varying at least one of: (i) the area of both said higher and lower light transmission density regions, and (ii) the transmission density of said region of relatively higher light transmission density, to thereby vary the pattern of said relatively higher and lower light transmission density regions of said screen and to thereby vary the light transmission characteristic of said screen; wherein said screen comprises an electrochromic display device provided on a transparent substrate, said display device having an electrochromic film sandwiched between two transparent electrode containing layers, electrodes of said electrode containing layers being arranged to form a plurality of separated overlapping regions where electrodes of said electrode containing layers overlap, said overlapping regins having a higher transmission density than non-overlapping regions, said varying step comprising varying the respective areas of said overlapping and non-overlapping regions by selecting electrodes of said two transparent electrode containing layers having respective dimensions such that the area of overlap of said respective selected electrodes corresponds to the desired area of said overlapping regions of relatively higher transmission density, and applying an electrical signal to said selected electrodes.
Claim 20
Independent Claim
253 words
A method of transmitting light corresponding to an image onto a photosensitive material comprising: allowing light to contact said photosensitive material through a light transmitting optical screen to thereby expose said photosensitive material to said light after said light passes through said screen, said optical screen comprising an optically heterogenerous pattern consisting of regions of relatively higher light transmission density and regions of relatively lower light transmission density, and varying at least one of: (i) the area of both said higher and lower light transmission density regions, and (ii) the transmission density of said region of relatively higher light transmission density, to thereby vary the pattern of said relatively higher and lower light transmission density regions of said screen and to thereby vary the light transmission characteristic of said screen; wherein said screen comprises an electrochromic display device provided on a transparent substrate, said display device having an electrochromic film sandwiched between two transparent electrode containing layers, electrodes of said electrode containing layers being arranged to form a plurality of separated overlapping regions where electrodes of said electrode containing layers overlap, said overlapping regins having a higher transmission density than non-overlapping regions, said varying step comprising varying the respective areas of said overlapping and non-overlapping regions by selecting electrodes of said two transparent electrode containing layers having respective dimensions such that the area of overlap of said respective selected electrodes corresponds to the desired area of said overlapping regions of relatively higher transmission density, and applying an electrical signal to said selected electrodes.
Claim 21
Dependent Claim
12 words
The method of claim 14, wherein said applied electrical signal is variable.
References Cited (Backward Citations)
US3986771A
Cited
US4297695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-28 | 1991-06-29 | 1991-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-28 | 1995-06-29 | 1995-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-28 | 1999-06-29 | 1999-12-29 | $7700.00 | Window Closed / Lapsed |