SE7709187L - WAY TO COPY A VIDEO - Google Patents
WAY TO COPY A VIDEOInfo
- Publication number
- SE7709187L SE7709187L SE7709187A SE7709187A SE7709187L SE 7709187 L SE7709187 L SE 7709187L SE 7709187 A SE7709187 A SE 7709187A SE 7709187 A SE7709187 A SE 7709187A SE 7709187 L SE7709187 L SE 7709187L
- Authority
- SE
- Sweden
- Prior art keywords
- replicate
- disc
- contact
- contact printing
- photographic
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/28—Re-recording, i.e. transcribing information from one optical record carrier on to one or more similar or dissimilar record carriers
-
- 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
- G03C1/00—Photosensitive materials
- G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
-
- 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
- G03C5/18—Diazo-type processes, e.g. thermal development, or agents therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
- G11B7/261—Preparing a master, e.g. exposing photoresist, electroforming
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Manufacturing Optical Record Carriers (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
Abstract
PRODUCING A REPLICATE VIDEO DISC BY A METHOD OF PHOTOGRAPHIC CONTACT PRINTING A photographic contact printing process is disclosed having application in the mass production of replicate video discs from a master disc, and other applications wherein it is desired to replicate microdetail over a relatively large area. A problem with conventional contact printing from a mask to a photographic medium is one of maintaining intimate contact over a relatively large area since dust, dirt, etc., are almost impossible to completely eliminate in any practical manner. In accordance with the present invention, a contact printing process is proposed wherein intimate contact is not necessary for making high quality contact prints. The present invention recognizes that in contact printing information from a master disc to a replicate disc, the contact printing process is significantly less sensitive to imperfect contact between the master disc and the replicate disc if one employs a replicate disc comprising a photosensitive material having certain optical properties. In particular, the photosensitive material initially has a high level of absorption to the actinic radiation used for exposure but, under the influence of such actinic radiation, the absorption decays to a lower level during exposure.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US71501776A | 1976-08-16 | 1976-08-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
SE7709187L true SE7709187L (en) | 1978-02-17 |
SE435215B SE435215B (en) | 1984-09-10 |
Family
ID=24872370
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7709187A SE435215B (en) | 1976-08-16 | 1977-08-15 | INFORMATION GUIDE AND PHOTOGRAPHIC PREPARATION OF A DUPLICATE INFORMATION GUIDE |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPS5323605A (en) |
AU (1) | AU513067B2 (en) |
BE (1) | BE857828A (en) |
CA (1) | CA1171959A (en) |
CH (1) | CH616797A5 (en) |
GB (1) | GB1590795A (en) |
IT (1) | IT1083923B (en) |
SE (1) | SE435215B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5724038A (en) * | 1980-07-18 | 1982-02-08 | Sony Corp | Information recording member |
JPS5826335A (en) * | 1981-08-07 | 1983-02-16 | Toppan Printing Co Ltd | Duplicating method of information recording disc |
-
1977
- 1977-07-19 CA CA000283079A patent/CA1171959A/en not_active Expired
- 1977-08-12 IT IT2669577A patent/IT1083923B/en active
- 1977-08-12 CH CH993377A patent/CH616797A5/en not_active IP Right Cessation
- 1977-08-15 SE SE7709187A patent/SE435215B/en not_active IP Right Cessation
- 1977-08-15 AU AU27880/77A patent/AU513067B2/en not_active Expired
- 1977-08-16 JP JP9816277A patent/JPS5323605A/en active Pending
- 1977-08-16 BE BE180208A patent/BE857828A/en not_active IP Right Cessation
- 1977-08-16 GB GB3438477A patent/GB1590795A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
AU513067B2 (en) | 1980-11-13 |
IT1083923B (en) | 1985-05-25 |
GB1590795A (en) | 1981-06-10 |
BE857828A (en) | 1978-02-16 |
SE435215B (en) | 1984-09-10 |
CH616797A5 (en) | 1980-04-15 |
CA1171959A (en) | 1984-07-31 |
AU2788077A (en) | 1979-02-22 |
JPS5323605A (en) | 1978-03-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |
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