GB1336819A - Optical projection system - Google Patents
Optical projection systemInfo
- Publication number
- GB1336819A GB1336819A GB4457871A GB4457871A GB1336819A GB 1336819 A GB1336819 A GB 1336819A GB 4457871 A GB4457871 A GB 4457871A GB 4457871 A GB4457871 A GB 4457871A GB 1336819 A GB1336819 A GB 1336819A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- plane
- reflector
- pair
- image
- 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
- 230000003287 optical effect Effects 0.000 title abstract 5
- 238000003384 imaging method Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
- G03G15/041—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with variable magnification
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Systems Of Projection Type Copiers (AREA)
- Variable Magnification In Projection-Type Copying Machines (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Abstract
1336819 Photo-copying apparatus INTERNATIONAL BUSINESS MACHINES CORP 24 Sept 1971 [6 Nov 1970] 44578/71 Heading G2A A projection optical system in, e.g. an electrophotographic copier, for imaging a document on a first plane 5 on to an image-receiving surface at a second plane 2a, includes a lens 12 and a reflector 11, the lens being mounted to move rectilinearly between two limit positions for selectively varying the magnification ratio of the image, the motion of the lens between the said positions having components along and perpendicular to the lens optical axis; the reflector 11 being mounted to move between two limit positions to vary the length of the optical path between the first and second planes; and means being provided for moving the reflector to a position appropriate to that selected for the lens. The mirror 11 is movable both parallel and perpendicular to itself. A second fixed mirror 10 completes the optical system, and flash lamps 6, 7 are provided for effecting whole frame exposure. The movement of parts 11, 12 is such that a pair of reference lines in the first plane 5 are imaged at a pair of reference lines on the second plane 2a, regardless of the selected magnification ratio.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US8750870A | 1970-11-06 | 1970-11-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1336819A true GB1336819A (en) | 1973-11-14 |
Family
ID=22205608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4457871A Expired GB1336819A (en) | 1970-11-06 | 1971-09-24 | Optical projection system |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS541178B1 (en) |
| AU (1) | AU462019B2 (en) |
| BE (1) | BE774410A (en) |
| CA (1) | CA967796A (en) |
| CH (1) | CH530661A (en) |
| DE (1) | DE2154944A1 (en) |
| ES (1) | ES396573A1 (en) |
| FR (1) | FR2116380B1 (en) |
| GB (1) | GB1336819A (en) |
| NL (1) | NL7113050A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2609744A1 (en) * | 1975-03-10 | 1976-09-23 | Seib Ltd Martin | OPTICAL VIEWING DEVICE WITH OPTIONAL COPY POSSIBILITY |
| DE2627361A1 (en) * | 1975-06-20 | 1976-12-30 | Xerox Corp | DEVICE FOR VIEWING AND PROJECTING AN ORIGINAL ON A MOVABLE IMAGE PLATE, IN PARTICULAR IN AN ELECTROSTATOGRAPHIC COPY DEVICE |
| FR2330044A1 (en) * | 1975-10-30 | 1977-05-27 | Xerox Corp | VARIABLE ENLARGEMENT REPROGRAPHY UNIT |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3778147A (en) * | 1972-07-11 | 1973-12-11 | Xerox Corp | Electrostatic reproduction machine having selectable magnification ratios |
| US3897148A (en) * | 1973-11-29 | 1975-07-29 | Ibm | Optical scanning system |
| JPS6014345B2 (en) * | 1974-12-25 | 1985-04-12 | 株式会社リコー | Variable magnification slit exposure method in electronic copying machine |
| GB1525218A (en) * | 1976-09-07 | 1978-09-20 | Ibm | Electrophotographic copying machine |
| US4120578A (en) * | 1976-09-07 | 1978-10-17 | International Business Machines Corporation | Continuously variable reduction scanning optics drive |
| US4105327A (en) * | 1976-12-09 | 1978-08-08 | International Business Machines Corporation | Multiple reduction indicators for continuously variable reduction copier machines |
| JPS5392126A (en) * | 1977-01-25 | 1978-08-12 | Ricoh Co Ltd | Exposure regulator for variable magnification copying machine |
| CA1126800A (en) * | 1978-11-09 | 1982-06-29 | Benzion Landa | Rotatable focusing means for variable magnification electrophotographic copier |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1198539A (en) * | 1968-12-09 | 1970-07-15 | Tokyo Shibaura Electric Co | Photocopying Apparatus. |
| JPS4821892B1 (en) * | 1969-02-28 | 1973-07-02 |
-
1971
- 1971-09-22 JP JP7350571A patent/JPS541178B1/ja active Pending
- 1971-09-23 NL NL7113050A patent/NL7113050A/xx active Search and Examination
- 1971-09-24 GB GB4457871A patent/GB1336819A/en not_active Expired
- 1971-10-12 FR FR7137749A patent/FR2116380B1/fr not_active Expired
- 1971-10-25 BE BE774410A patent/BE774410A/en not_active IP Right Cessation
- 1971-10-28 CH CH1576071A patent/CH530661A/en not_active IP Right Cessation
- 1971-11-02 CA CA126,620A patent/CA967796A/en not_active Expired
- 1971-11-02 AU AU35279/71A patent/AU462019B2/en not_active Expired
- 1971-11-02 ES ES396573A patent/ES396573A1/en not_active Expired
- 1971-11-05 DE DE19712154944 patent/DE2154944A1/en not_active Ceased
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2609744A1 (en) * | 1975-03-10 | 1976-09-23 | Seib Ltd Martin | OPTICAL VIEWING DEVICE WITH OPTIONAL COPY POSSIBILITY |
| DE2627361A1 (en) * | 1975-06-20 | 1976-12-30 | Xerox Corp | DEVICE FOR VIEWING AND PROJECTING AN ORIGINAL ON A MOVABLE IMAGE PLATE, IN PARTICULAR IN AN ELECTROSTATOGRAPHIC COPY DEVICE |
| US4013361A (en) * | 1975-06-20 | 1977-03-22 | Xerox Corporation | Optical apparatus and reproducing machine |
| FR2330044A1 (en) * | 1975-10-30 | 1977-05-27 | Xerox Corp | VARIABLE ENLARGEMENT REPROGRAPHY UNIT |
Also Published As
| Publication number | Publication date |
|---|---|
| NL7113050A (en) | 1972-05-09 |
| AU3527971A (en) | 1973-05-10 |
| BE774410A (en) | 1972-02-14 |
| AU462019B2 (en) | 1975-06-12 |
| FR2116380A1 (en) | 1972-07-13 |
| DE2154944A1 (en) | 1972-05-18 |
| FR2116380B1 (en) | 1974-05-31 |
| CA967796A (en) | 1975-05-20 |
| JPS541178B1 (en) | 1979-01-22 |
| CH530661A (en) | 1972-11-15 |
| ES396573A1 (en) | 1974-05-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |