GB973041A - - Google Patents
Info
- Publication number
- GB973041A GB973041A GB659462A GB659462A GB973041A GB 973041 A GB973041 A GB 973041A GB 659462 A GB659462 A GB 659462A GB 659462 A GB659462 A GB 659462A GB 973041 A GB973041 A GB 973041A
- Authority
- GB
- United Kingdom
- Prior art keywords
- positive
- objective
- plane
- negative
- screen
- 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
- G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
- G03B27/52—Details
- G03B27/522—Projection optics
-
- 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
- G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
- G03B27/34—Means for automatic focusing therefor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Projection-Type Copiers In General (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
973, 041. Photographic printing apparatus. AGFA A.G. Feb. 20, 1962 [Feb. 25,1961], No. 6594/62. Heading G2A. A projection printing apparatus has a fixed negative stage, an adjustable positive easel, and a fixed focusing screen separate from the positive stage, means being provided for producing an image on the screen which automatically remains optically equivalent to that produced on the positive easel whatever the position of the latter. In the form shown, light from a source 4 passes through a system of optical elements 5, 6, 7, 8 to pass through the negative at 10. After passing through the objective 11, which is housed in a vertical guide 12, the light beam falls on the positive easel 14. This is housed in a box-like carrier 13 which can be moved vertically along a threaded spindle 20, its two extreme positions being shown in full lines and broken lines. Also housed in carrier 13 is an inclined partly transparent mirror 16 which reflects some of the light to a measuring device 18, 19. Just above the objective 11 is another inclined mirror 37, which, together with two further inclined mirrors 35, 36, constitute a system for reflecting part or all of the printing light beam on to a fixed inspection screen 38. The mirrors 35, 36 are mounted in a carriage 33 which can be moved horizontally by means of a threaded spindle 27. Spindles 27 and 20 are coupled together by bevel gears 30, 31 so that both spindles rotate together when driven by motor 23. The relative pitch of spindles 20, 27 is such that the distance a moved through by carrier 13 is twice the distance b moved through by carriage 33. Thus the light path between negative plane 10 and positive plane 14 is always equal to the light path between negative plane 10 and screen 38, whatever the position of plane 14. Focusing of the objective 11 may be effected by attaching a bracket 42 to the objective, a pin 41 at the end of the bracket riding on a cam surface 40 on a plate 39 fixed to the carriage 33.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1961A0036808 DE1142101B (en) | 1961-02-25 | 1961-02-25 | Copier, in particular roller copier |
Publications (1)
Publication Number | Publication Date |
---|---|
GB973041A true GB973041A (en) | 1964-10-21 |
Family
ID=6929848
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB659462A Expired GB973041A (en) | 1961-02-25 | 1962-02-20 | |
GB2705162A Expired GB1006510A (en) | 1961-02-25 | 1962-07-13 | Treatment of wood |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2705162A Expired GB1006510A (en) | 1961-02-25 | 1962-07-13 | Treatment of wood |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1142101B (en) |
GB (2) | GB973041A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2298050A (en) * | 1995-02-17 | 1996-08-21 | Peter Frederick Holt | Photographic printing apparatus |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102642225B (en) * | 2012-04-12 | 2014-11-26 | 广东省宜华木业股份有限公司 | Processing method for teak discoloration |
-
1961
- 1961-02-25 DE DE1961A0036808 patent/DE1142101B/en active Pending
-
1962
- 1962-02-20 GB GB659462A patent/GB973041A/en not_active Expired
- 1962-07-13 GB GB2705162A patent/GB1006510A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2298050A (en) * | 1995-02-17 | 1996-08-21 | Peter Frederick Holt | Photographic printing apparatus |
GB2298050B (en) * | 1995-02-17 | 1998-09-09 | Peter Frederick Holt | Photographic apparatus |
Also Published As
Publication number | Publication date |
---|---|
DE1142101B (en) | 1963-01-03 |
GB1006510A (en) | 1965-10-06 |
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