GB2007383A - Optical compensation - Google Patents

Optical compensation

Info

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
Application number
GB7840450A
Other versions
GB2007383B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fritzler U M
Original Assignee
Fritzler U M
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US05/842,980 external-priority patent/US4126386A/en
Application filed by Fritzler U M filed Critical Fritzler U M
Publication of GB2007383A publication Critical patent/GB2007383A/en
Application granted granted Critical
Publication of GB2007383B publication Critical patent/GB2007383B/en
Expired legal-status Critical Current

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

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>
GB7840450A 1977-10-17 1978-10-13 Image stabilization system for continuous film scanning apparatus Expired GB2007383B (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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
DE2843998A1 (en) 1979-04-19
NL7810401A (en) 1979-04-19
ATA742378A (en) 1982-04-15
JPS5467427A (en) 1979-05-30
CA1108449A (en) 1981-09-08
GB2007383B (en) 1982-06-16

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee