GB486839A - Improvements in or relating to polarisation filters - Google Patents

Improvements in or relating to polarisation filters

Info

Publication number
GB486839A
GB486839A GB31009/37A GB3100937A GB486839A GB 486839 A GB486839 A GB 486839A GB 31009/37 A GB31009/37 A GB 31009/37A GB 3100937 A GB3100937 A GB 3100937A GB 486839 A GB486839 A GB 486839A
Authority
GB
United Kingdom
Prior art keywords
polarizer
analyzer
colour
objective
filter
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
Application number
GB31009/37A
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.)
Zeiss Ikon AG
Original Assignee
Zeiss Ikon AG
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
Application filed by Zeiss Ikon AG filed Critical Zeiss Ikon AG
Publication of GB486839A publication Critical patent/GB486839A/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
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/281—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for attenuating light intensity, e.g. comprising rotatable polarising elements

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Eye Examination Apparatus (AREA)

Abstract

486,839. Polarizing-apparatus ; colour photography. ZEISS IKON AKT.-GES. Nov. 11, 1937, No. 31009. Convention date, Jan. 29. [Classes 97 (i), 98 (i), and 98 (ii)] A polarization filter, particularly intended for use in colour photography &c., on lenticular films, comprises a polarizer, an analyzer, and one or more colour filters or selectively reflecting mirrors to enable a neutral grey weakening of the light to be obtained as the polarizer and analyzer are relatively rotated. As shown, a rotatable polarizer 4, an analyzer 3, and a colour filter 2 are mounted in a member 1 which can be attached to a photographic objective. Alternatively, the polarizer &c. may be made integral with the objective. The filter 2 may be replaced by a selectivelyreflecting mirror, preferably set at about 45‹ to the objective axis.
GB31009/37A 1937-01-29 1937-11-11 Improvements in or relating to polarisation filters Expired GB486839A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE486839X 1937-01-29

Publications (1)

Publication Number Publication Date
GB486839A true GB486839A (en) 1938-06-10

Family

ID=6543512

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31009/37A Expired GB486839A (en) 1937-01-29 1937-11-11 Improvements in or relating to polarisation filters

Country Status (1)

Country Link
GB (1) GB486839A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE757962C (en) * 1940-01-09 1952-04-07 Friedrich Deckel Praez S Mecha Photographic shutter
DE764938C (en) * 1938-10-29 1954-10-11 Aeg Arrangement for simulating rotary movements of measuring devices, counters or the like, in which the exposure of photocells is changed by means of rotatable apertures
US4327984A (en) * 1981-07-27 1982-05-04 Evans Karl K Light filter assembly for photographic camera

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE764938C (en) * 1938-10-29 1954-10-11 Aeg Arrangement for simulating rotary movements of measuring devices, counters or the like, in which the exposure of photocells is changed by means of rotatable apertures
DE757962C (en) * 1940-01-09 1952-04-07 Friedrich Deckel Praez S Mecha Photographic shutter
US4327984A (en) * 1981-07-27 1982-05-04 Evans Karl K Light filter assembly for photographic camera

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