GB1109484A - Photographic printing process and apparatus for carrying out the same - Google Patents
Photographic printing process and apparatus for carrying out the sameInfo
- Publication number
- GB1109484A GB1109484A GB1485365A GB1485365A GB1109484A GB 1109484 A GB1109484 A GB 1109484A GB 1485365 A GB1485365 A GB 1485365A GB 1485365 A GB1485365 A GB 1485365A GB 1109484 A GB1109484 A GB 1109484A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gradation
- exposure time
- shutter
- intensity
- wedge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B27/00—Photographic printing apparatus
- G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/02—Sensitometric processes, e.g. determining sensitivity, colour sensitivity, gradation, graininess, density; Making sensitometric wedges
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/08—Photoprinting; Processes and means for preventing photoprinting
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Projection-Type Copiers In General (AREA)
Abstract
1,109,484. Controlling gradation. FUJI SHASHIN FILM KABUSHIKI KAISHA. April 7, 1965 [April 8, 1964], No. 14853/65. Headings G2A and G2C. In photographic printing, in which the density of the printed image depends on the product of the light intensity and the exposure time, the gradation is controlled by varying the exposure time inversely with the intensity so that an image of the desired density and gradation is obtained. The exposure time is from 1 to 0À01 sec., or less. Thus various gradations can be obtained from one kind of printing paper, avoiding the necessity for providing different papers of varying degrees of hardness or softness. Fig. 2 shows a suitable apparatus. A light source 1 is controlled from a power supply 2, and the light passes through a condenser lens 6, negative 7, an objective lens 8 and iris diaphragm 9 to the printing paper 10. Also in the light path are a step wedge 4 and a shutter 3. Wedge 4 controls the light intensity, and shutter 3 the exposure time. These are varied inversely with respect to each other by means of a gradation selector 5, adjusted after inspection of the negative to give the required gradation and density. Alternatively the selector 5 may couple the wedge 4 and power supply 2 to provide inverse variation of intensity and time, in which case the shutter 3 may be omitted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1947164 | 1964-04-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1109484A true GB1109484A (en) | 1968-04-10 |
Family
ID=12000221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1485365A Expired GB1109484A (en) | 1964-04-08 | 1965-04-07 | Photographic printing process and apparatus for carrying out the same |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH428437A (en) |
| DE (1) | DE1472891A1 (en) |
| GB (1) | GB1109484A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4947207A (en) * | 1988-12-05 | 1990-08-07 | Eastman Kodak Company | Apparatus for exposing photographic materials |
| DE19538593A1 (en) * | 1995-10-17 | 1997-04-24 | Agfa Gevaert Ag | Copying method for photographic originals with different density range |
-
1965
- 1965-04-07 GB GB1485365A patent/GB1109484A/en not_active Expired
- 1965-04-07 DE DE19651472891 patent/DE1472891A1/en active Pending
- 1965-04-08 CH CH492065A patent/CH428437A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH428437A (en) | 1967-01-15 |
| DE1472891A1 (en) | 1968-12-12 |
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