GB451530A - Improvements in or relating to photo-electric exposure meters - Google Patents

Improvements in or relating to photo-electric exposure meters

Info

Publication number
GB451530A
GB451530A GB16209/35A GB1620935A GB451530A GB 451530 A GB451530 A GB 451530A GB 16209/35 A GB16209/35 A GB 16209/35A GB 1620935 A GB1620935 A GB 1620935A GB 451530 A GB451530 A GB 451530A
Authority
GB
United Kingdom
Prior art keywords
plate
cell
june
group
photo
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
GB16209/35A
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 GB451530A publication Critical patent/GB451530A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
    • G01J1/0477—Prisms, wedges
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G01J1/06—Restricting the angle of incident light

Abstract

451,530. Light-sensitive cells. ZEISS IKON AKT.-GES., 72, Schandauer Strasse, Dresden, Germany. June 4, 1935, No. 16209. Convention date, June 2, 1934. Drawings to Specification. [Class 40 (iii)] [See also Group XX] An exposure meter incorporating a lightsensitive cell is provided with prisms or prismatic elements for totally reflecting away from the cell all light falling thereon at more than a certain angle of incidence. A plate having straight or circular rows of elements of pyramidal, conical, or roof-like form may be arranged over the sensitive layer of the cell. Rays falling on such a plate at a angle greater than the critical angle for the material of the plate, which may be of glass or other transparent material, are totally reflected thereby. Specification 416,553, [Group XX], is referred to.
GB16209/35A 1934-06-02 1935-06-04 Improvements in or relating to photo-electric exposure meters Expired GB451530A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE451530X 1934-06-02

Publications (1)

Publication Number Publication Date
GB451530A true GB451530A (en) 1936-08-07

Family

ID=6538527

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16209/35A Expired GB451530A (en) 1934-06-02 1935-06-04 Improvements in or relating to photo-electric exposure meters

Country Status (1)

Country Link
GB (1) GB451530A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE745777C (en) * 1939-07-25 1944-11-30 Electric light meter
DE1166500B (en) * 1959-08-01 1964-03-26 Zeiss Ikon Ag Photoelectric light meter with light beam limiter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE745777C (en) * 1939-07-25 1944-11-30 Electric light meter
DE1166500B (en) * 1959-08-01 1964-03-26 Zeiss Ikon Ag Photoelectric light meter with light beam limiter

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