AT294452B - Comparison photometer - Google Patents

Comparison photometer

Info

Publication number
AT294452B
AT294452B AT336765A AT336765A AT294452B AT 294452 B AT294452 B AT 294452B AT 336765 A AT336765 A AT 336765A AT 336765 A AT336765 A AT 336765A AT 294452 B AT294452 B AT 294452B
Authority
AT
Austria
Prior art keywords
comparison photometer
photometer
comparison
Prior art date
Application number
AT336765A
Other languages
German (de)
Original Assignee
Polaroid Corp
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 US359109A external-priority patent/US3416866A/en
Priority claimed from US359115A external-priority patent/US3323430A/en
Priority claimed from US359113A external-priority patent/US3368447A/en
Priority claimed from US359116A external-priority patent/US3323431A/en
Application filed by Polaroid Corp filed Critical Polaroid Corp
Application granted granted Critical
Publication of AT294452B publication Critical patent/AT294452B/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Stroboscope Apparatuses (AREA)
  • Stereoscopic And Panoramic Photography (AREA)
AT336765A 1964-04-13 1965-04-12 Comparison photometer AT294452B (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US359109A US3416866A (en) 1964-04-13 1964-04-13 Comparison photometer using lenticular screen
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
US359116A US3323431A (en) 1964-04-13 1964-04-13 Comparison photometer

Publications (1)

Publication Number Publication Date
AT294452B true AT294452B (en) 1971-11-25

Family

ID=27502921

Family Applications (5)

Application Number Title Priority Date Filing Date
AT336965A AT294453B (en) 1964-04-13 1965-04-12 Comparison photometer
AT336865A AT314863B (en) 1964-04-13 1965-04-12 Comparison photometer
AT336765A AT294452B (en) 1964-04-13 1965-04-12 Comparison photometer
AT336665A AT287342B (en) 1964-04-13 1965-04-12 Comparison photometer
AT1019865A AT314864B (en) 1964-04-13 1965-11-11 Comparison photometer

Family Applications Before (2)

Application Number Title Priority Date Filing Date
AT336965A AT294453B (en) 1964-04-13 1965-04-12 Comparison photometer
AT336865A AT314863B (en) 1964-04-13 1965-04-12 Comparison photometer

Family Applications After (2)

Application Number Title Priority Date Filing Date
AT336665A AT287342B (en) 1964-04-13 1965-04-12 Comparison photometer
AT1019865A AT314864B (en) 1964-04-13 1965-11-11 Comparison photometer

Country Status (7)

Country Link
AT (5) AT294453B (en)
BE (4) BE662399A (en)
CH (4) CH497693A (en)
DE (4) DE1260179B (en)
GB (1) GB1100260A (en)
NL (4) NL6504697A (en)
SE (4) SE330096B (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
NL6504697A (en) 1965-10-14
BE662443A (en) 1965-10-13
NL6504696A (en) 1965-10-14
BE662399A (en) 1965-10-12
AT287342B (en) 1971-01-25
CH497693A (en) 1970-10-15
BE662442A (en) 1965-10-13
NL6504656A (en) 1965-10-14
SE315137B (en) 1969-09-22
AT314863B (en) 1974-04-25
DE1260179B (en) 1968-02-01
SE330096B (en) 1970-11-02
AT294453B (en) 1971-11-25
CH522212A (en) 1972-06-15
SE330782B (en) 1970-11-30
AT314864B (en) 1974-04-25
GB1100260A (en) 1968-01-24
DE1297887B (en) 1969-06-19
NL6504698A (en) 1965-10-14
DE1291914B (en) 1969-04-03
SE330783B (en) 1970-11-30
CH497692A (en) 1970-10-15
CH469247A (en) 1969-02-28
BE662444A (en) 1965-10-13
DE1273854B (en) 1968-07-25

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Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee