GB2007383A - Optical compensation - Google Patents
Optical compensationInfo
- Publication number
- GB2007383A GB2007383A GB7840450A GB7840450A GB2007383A GB 2007383 A GB2007383 A GB 2007383A GB 7840450 A GB7840450 A GB 7840450A GB 7840450 A GB7840450 A GB 7840450A GB 2007383 A GB2007383 A GB 2007383A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- images
- scanner
- facets
- covering
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/18—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical projection, e.g. combination of mirror and condenser and objective
-
- 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
- G03B41/00—Special techniques not covered by groups G03B31/00 - G03B39/00; Apparatus therefor
- G03B41/02—Special techniques not covered by groups G03B31/00 - G03B39/00; Apparatus therefor using non-intermittently running film
- G03B41/04—Special techniques not covered by groups G03B31/00 - G03B39/00; Apparatus therefor using non-intermittently running film with optical compensator
- G03B41/06—Special techniques not covered by groups G03B31/00 - G03B39/00; Apparatus therefor using non-intermittently running film with optical compensator with rotating reflecting member
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Facsimile Scanning Arrangements (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Projection Apparatus (AREA)
Abstract
An optical scanner system such as an optically compensated cine projector has a rotary polygonal reflective device 4 with 24 facets each having orthogonal mirrors 10 and 12. The lower part of the device has radial spoke baffles 22 to remove ghost images, and sprockets 20 over which film 18 passes, extending over at least two or three facets and covering the mirror 12 of each. A long narrow arc lamp 28 illuminates film 18 lengthwise through condensers 24 and 26 (condenser 24 covering two or three frames), and a projection lens 6 forms real images of the virtual images of the film frames formed by the scanner. The top and bottom of the real images are subject to defocussing and motion inherent in the scanner design. To compensate for this: (i) a field flattening lens (40, Fig. 10) is included in the projection system, (ii) vignetting is used to deluminate the top and bottom image portions, (iii) the projection system is telecentric, and (iv) rays to the top and bottom image portions are tangential to the locus in space of focussed image point positions. <IMAGE>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/842,980 US4126386A (en) | 1976-09-09 | 1977-10-17 | Image stabilization system for continuous film scanning apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2007383A true GB2007383A (en) | 1979-05-16 |
GB2007383B GB2007383B (en) | 1982-06-16 |
Family
ID=25288743
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7840450A Expired GB2007383B (en) | 1977-10-17 | 1978-10-13 | Image stabilization system for continuous film scanning apparatus |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS5467427A (en) |
AT (1) | ATA742378A (en) |
CA (1) | CA1108449A (en) |
DE (1) | DE2843998A1 (en) |
GB (1) | GB2007383B (en) |
NL (1) | NL7810401A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991014966A1 (en) * | 1990-03-23 | 1991-10-03 | Spitzl Guenther | Process for producing, on a projection surface, still pictures of images stored on an image store and moved continuously past an image window |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4153363B2 (en) | 2003-05-21 | 2008-09-24 | ヤンマー株式会社 | Tractor |
-
1978
- 1978-09-06 CA CA310,752A patent/CA1108449A/en not_active Expired
- 1978-10-09 DE DE19782843998 patent/DE2843998A1/en not_active Withdrawn
- 1978-10-13 GB GB7840450A patent/GB2007383B/en not_active Expired
- 1978-10-16 AT AT742378A patent/ATA742378A/en not_active Application Discontinuation
- 1978-10-17 NL NL7810401A patent/NL7810401A/en not_active Application Discontinuation
- 1978-10-17 JP JP12778378A patent/JPS5467427A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991014966A1 (en) * | 1990-03-23 | 1991-10-03 | Spitzl Guenther | Process for producing, on a projection surface, still pictures of images stored on an image store and moved continuously past an image window |
Also Published As
Publication number | Publication date |
---|---|
NL7810401A (en) | 1979-04-19 |
GB2007383B (en) | 1982-06-16 |
ATA742378A (en) | 1982-04-15 |
JPS5467427A (en) | 1979-05-30 |
CA1108449A (en) | 1981-09-08 |
DE2843998A1 (en) | 1979-04-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |