GB614546A - Improved exposure meter - Google Patents

Improved exposure meter

Info

Publication number
GB614546A
GB614546A GB2953045A GB2953045A GB614546A GB 614546 A GB614546 A GB 614546A GB 2953045 A GB2953045 A GB 2953045A GB 2953045 A GB2953045 A GB 2953045A GB 614546 A GB614546 A GB 614546A
Authority
GB
United Kingdom
Prior art keywords
carrier
light modifying
scale
light
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
GB2953045A
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.)
GERTRUDE ELSBETH FREUND
Original Assignee
GERTRUDE ELSBETH FREUND
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 GERTRUDE ELSBETH FREUND filed Critical GERTRUDE ELSBETH FREUND
Priority to GB2953045A priority Critical patent/GB614546A/en
Publication of GB614546A publication Critical patent/GB614546A/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
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/4209—Photoelectric exposure meters for determining the exposure time in recording or reproducing
    • G01J1/4214—Photoelectric exposure meters for determining the exposure time in recording or reproducing specially adapted for view-taking apparatus

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

614,546. Photographic exposure meters. FREUND, G. E. Nov. 6, 1945, No. 29530. [Class 40 (iii)] [Also in Group XX] An exposure meter comprises a housing containing a photo-electric cell and an indicating instrument, and has a rotatable carrier carrying a plurality of light modifying members mounted on an axis perpendicular to the housing, which carrier is operatively connected to a scale member so that a scale appropriate to each light modifying member is brought into a position for reading when that light modifying member is placed over the photo-electric cell. The indicating instrument is a milliammeter, microammeter, microvoltmeter or millivoltmeter. Fig. 1 shows the front of the exposure meter, with housing 10, carrier 22 mounted on shaft 25 and having translucent convex light modifying member 23 suitable to receive incident light upon, and grid member 24 suitable to receive reflected light from, the object to be photographed. Fig. 2 is a side view showing photo-electric cell 20 and a rear window 32 through which needle 33 of the indicating instrument, and scale member 36 may be observed. The carrier may be provided with four light modifying members, each of which has a corresponding scale. Specification 531,996 is referred to.
GB2953045A 1945-11-06 1945-11-06 Improved exposure meter Expired GB614546A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2953045A GB614546A (en) 1945-11-06 1945-11-06 Improved exposure meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2953045A GB614546A (en) 1945-11-06 1945-11-06 Improved exposure meter

Publications (1)

Publication Number Publication Date
GB614546A true GB614546A (en) 1948-12-17

Family

ID=10292989

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2953045A Expired GB614546A (en) 1945-11-06 1945-11-06 Improved exposure meter

Country Status (1)

Country Link
GB (1) GB614546A (en)

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