GB1350825A - Exposure indicating and or control apparatus - Google Patents

Exposure indicating and or control apparatus

Info

Publication number
GB1350825A
GB1350825A GB1858471A GB1858471A GB1350825A GB 1350825 A GB1350825 A GB 1350825A GB 1858471 A GB1858471 A GB 1858471A GB 1858471 A GB1858471 A GB 1858471A GB 1350825 A GB1350825 A GB 1350825A
Authority
GB
United Kingdom
Prior art keywords
input
comparator
output
brightness
exposure
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
GB1858471A
Other languages
English (en)
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.)
Societe dOptique Precision Electronique et Mecanique SOPELEM SA
Original Assignee
Societe dOptique Precision Electronique et Mecanique SOPELEM SA
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 Societe dOptique Precision Electronique et Mecanique SOPELEM SA filed Critical Societe dOptique Precision Electronique et Mecanique SOPELEM SA
Publication of GB1350825A publication Critical patent/GB1350825A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/02—Details
    • H01J37/22—Optical, image processing or photographic arrangements associated with the tube
    • H01J37/224—Luminescent screens or photographic plates for imaging; Apparatus specially adapted therefor, e. g. cameras, TV-cameras, photographic equipment or exposure control; Optical subsystems specially adapted therefor, e. g. microscopes for observing image on luminescent screen
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Measurement Of Radiation (AREA)
  • Electron Sources, Ion Sources (AREA)
GB1858471A 1970-06-02 1971-06-02 Exposure indicating and or control apparatus Expired GB1350825A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7020130A FR2093096A5 (enrdf_load_stackoverflow) 1970-06-02 1970-06-02

Publications (1)

Publication Number Publication Date
GB1350825A true GB1350825A (en) 1974-04-24

Family

ID=9056523

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1858471A Expired GB1350825A (en) 1970-06-02 1971-06-02 Exposure indicating and or control apparatus

Country Status (4)

Country Link
DE (1) DE2117062C3 (enrdf_load_stackoverflow)
FR (1) FR2093096A5 (enrdf_load_stackoverflow)
GB (1) GB1350825A (enrdf_load_stackoverflow)
NL (1) NL7105764A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS148640B1 (enrdf_load_stackoverflow) * 1970-12-18 1973-03-29

Also Published As

Publication number Publication date
DE2117062B2 (de) 1974-03-07
NL7105764A (enrdf_load_stackoverflow) 1971-12-06
DE2117062C3 (de) 1974-10-03
DE2117062A1 (de) 1971-12-16
FR2093096A5 (enrdf_load_stackoverflow) 1972-01-28

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees