CH497693A - Comparison photometer - Google Patents

Comparison photometer

Info

Publication number
CH497693A
CH497693A CH500665A CH500665A CH497693A CH 497693 A CH497693 A CH 497693A CH 500665 A CH500665 A CH 500665A CH 500665 A CH500665 A CH 500665A CH 497693 A CH497693 A CH 497693A
Authority
CH
Switzerland
Prior art keywords
comparison photometer
photometer
comparison
Prior art date
Application number
CH500665A
Other languages
German (de)
Inventor
Herbert Land Edwin
Parshall Jr Cooper Dexter
Original Assignee
Internat Polaroid Corp Jersey
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
Priority claimed from US359115A external-priority patent/US3323430A/en
Priority claimed from US359113A external-priority patent/US3368447A/en
Priority claimed from US359109A external-priority patent/US3416866A/en
Priority claimed from US359116A external-priority patent/US3323431A/en
Application filed by Internat Polaroid Corp Jersey filed Critical Internat Polaroid Corp Jersey
Publication of CH497693A publication Critical patent/CH497693A/en

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
    • 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
CH500665A 1964-04-13 1965-04-09 Comparison photometer CH497693A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US359115A US3323430A (en) 1964-04-13 1964-04-13 Nonuniformly illuminated comparison photometer
US359113A US3368447A (en) 1964-04-13 1964-04-13 Comparison photometer using reflective pattern
US359109A US3416866A (en) 1964-04-13 1964-04-13 Comparison photometer using lenticular screen
US359116A US3323431A (en) 1964-04-13 1964-04-13 Comparison photometer

Publications (1)

Publication Number Publication Date
CH497693A true CH497693A (en) 1970-10-15

Family

ID=27502921

Family Applications (4)

Application Number Title Priority Date Filing Date
CH500265A CH469247A (en) 1964-04-13 1965-04-09 Comparison photometer
CH500365A CH497692A (en) 1964-04-13 1965-04-09 Comparison photometer
CH500665A CH497693A (en) 1964-04-13 1965-04-09 Comparison photometer
CH500465A CH522212A (en) 1964-04-13 1965-04-09 Comparison photometer

Family Applications Before (2)

Application Number Title Priority Date Filing Date
CH500265A CH469247A (en) 1964-04-13 1965-04-09 Comparison photometer
CH500365A CH497692A (en) 1964-04-13 1965-04-09 Comparison photometer

Family Applications After (1)

Application Number Title Priority Date Filing Date
CH500465A CH522212A (en) 1964-04-13 1965-04-09 Comparison photometer

Country Status (7)

Country Link
AT (5) AT294453B (en)
BE (4) BE662399A (en)
CH (4) CH469247A (en)
DE (4) DE1260179B (en)
GB (1) GB1100260A (en)
NL (4) NL6504656A (en)
SE (4) SE330782B (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE722965C (en) * 1937-11-06 1942-07-24 Dr Hans E J Neugebauer Method for comparing brightnesses
DE1104726B (en) * 1957-02-23 1961-04-13 Leitz Ernst Gmbh Light meters for photographic or cinematographic purposes
DE1166500B (en) * 1959-08-01 1964-03-26 Zeiss Ikon Ag Photoelectric light meter with light beam limiter
FR1268730A (en) * 1960-09-14 1961-08-04 Reichert Optische Werke Ag Visual photometric method for heterochromic photometry and apparatus for carrying out this method

Also Published As

Publication number Publication date
BE662443A (en) 1965-10-13
DE1291914B (en) 1969-04-03
AT294452B (en) 1971-11-25
NL6504698A (en) 1965-10-14
BE662444A (en) 1965-10-13
SE330782B (en) 1970-11-30
BE662399A (en) 1965-10-12
SE330096B (en) 1970-11-02
SE315137B (en) 1969-09-22
DE1273854B (en) 1968-07-25
CH497692A (en) 1970-10-15
NL6504697A (en) 1965-10-14
AT314864B (en) 1974-04-25
AT287342B (en) 1971-01-25
CH469247A (en) 1969-02-28
SE330783B (en) 1970-11-30
DE1260179B (en) 1968-02-01
NL6504696A (en) 1965-10-14
NL6504656A (en) 1965-10-14
AT294453B (en) 1971-11-25
GB1100260A (en) 1968-01-24
CH522212A (en) 1972-06-15
DE1297887B (en) 1969-06-19
AT314863B (en) 1974-04-25
BE662442A (en) 1965-10-13

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Legal Events

Date Code Title Description
PL Patent ceased