NL71977C - - Google Patents

Info

Publication number
NL71977C
NL71977C NL71977DA NL71977C NL 71977 C NL71977 C NL 71977C NL 71977D A NL71977D A NL 71977DA NL 71977 C NL71977 C NL 71977C
Authority
NL
Netherlands
Application number
Publication of NL71977C publication Critical patent/NL71977C/xx

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
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/12—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using wholly visual means
    • G01J1/122—Visual exposure meters for determining the exposure time in photographical recording or reproducing
    • G01J1/124—Visual exposure meters for determining the exposure time in photographical recording or reproducing based on the comparison of the intensity of measured light with a comparison source or comparison illuminated surface
NL71977D NL71977C (en)

Publications (1)

Publication Number Publication Date
NL71977C true NL71977C (en)

Family

ID=1823332

Family Applications (1)

Application Number Title Priority Date Filing Date
NL71977D NL71977C (en)

Country Status (1)

Country Link
NL (1) NL71977C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3490849A (en) * 1965-03-04 1970-01-20 Loebl & Co Ltd Joyce Registering and integrating sphere colorimeter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3490849A (en) * 1965-03-04 1970-01-20 Loebl & Co Ltd Joyce Registering and integrating sphere colorimeter

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