FR895873A - Photoelectric light meter suitable for enlargers - Google Patents

Photoelectric light meter suitable for enlargers

Info

Publication number
FR895873A
FR895873A FR895873DA FR895873A FR 895873 A FR895873 A FR 895873A FR 895873D A FR895873D A FR 895873DA FR 895873 A FR895873 A FR 895873A
Authority
FR
France
Prior art keywords
enlargers
light meter
photoelectric light
meter suitable
photoelectric
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
Other languages
French (fr)
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
Application granted granted Critical
Publication of FR895873A publication Critical patent/FR895873A/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
    • G01J1/4219—Photoelectric exposure meters for determining the exposure time in recording or reproducing specially adapted for enlargers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
FR895873D 1942-07-23 1943-06-25 Photoelectric light meter suitable for enlargers Expired FR895873A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE895873X 1942-07-23

Publications (1)

Publication Number Publication Date
FR895873A true FR895873A (en) 1945-02-06

Family

ID=6847928

Family Applications (1)

Application Number Title Priority Date Filing Date
FR895873D Expired FR895873A (en) 1942-07-23 1943-06-25 Photoelectric light meter suitable for enlargers

Country Status (1)

Country Link
FR (1) FR895873A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4738940A (en) * 1984-03-30 1988-04-19 Institut Francais Du Petrole Novel hydrocracking or cracking catalyst for hydrocarbon charges

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4738940A (en) * 1984-03-30 1988-04-19 Institut Francais Du Petrole Novel hydrocracking or cracking catalyst for hydrocarbon charges

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