JPS561076A - Correcting method for light source fluctuation in pattern generator - Google Patents

Correcting method for light source fluctuation in pattern generator

Info

Publication number
JPS561076A
JPS561076A JP7629079A JP7629079A JPS561076A JP S561076 A JPS561076 A JP S561076A JP 7629079 A JP7629079 A JP 7629079A JP 7629079 A JP7629079 A JP 7629079A JP S561076 A JPS561076 A JP S561076A
Authority
JP
Japan
Prior art keywords
light
hologram
laser
light source
pattern generator
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.)
Pending
Application number
JP7629079A
Other languages
Japanese (ja)
Inventor
Toshitatsu Suzuki
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP7629079A priority Critical patent/JPS561076A/en
Publication of JPS561076A publication Critical patent/JPS561076A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • G03H1/2286—Particular reconstruction light ; Beam properties
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/0486—Improving or monitoring the quality of the record, e.g. by compensating distortions, aberrations
    • G03H2001/0491—Improving or monitoring the quality of the record, e.g. by compensating distortions, aberrations by monitoring the hologram formation, e.g. via a feed-back loop
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • G03H1/2202—Reconstruction geometries or arrangements
    • G03H2001/2244—Means for detecting or recording the holobject

Landscapes

  • Holo Graphy (AREA)

Abstract

PURPOSE: To enable the output fluctuations of a laser oscillator be readily suppressed by detecting the reflected light from the hologram of laser light during accessing of character pattern groups, reading the output fluctuations of the light source and determining amplification degree by the value thus obtained.
CONSTITUTION: A light intensity detector 48 is disposed in the position where the reflected light 43 of a laser 41 for reconstruction arrives at the time of accessing a desired hologram from a hologram information plate 46 and radiating said laser to the hologram 47. An automatic gain control unit which is so constituted as to increase the amplification degree of a video amplifier 49 when the light intensity is weak at the time by using e.g. field effect transistors and the like is provided so that the image output of always a fixed level may be obtained without changing the quantity of light. As a result of this, the occurrence of any difference in reflectance depending upon holograms is obviated and the light source fluctuation correction in the pattern generator may be performed.
COPYRIGHT: (C)1981,JPO&Japio
JP7629079A 1979-06-19 1979-06-19 Correcting method for light source fluctuation in pattern generator Pending JPS561076A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7629079A JPS561076A (en) 1979-06-19 1979-06-19 Correcting method for light source fluctuation in pattern generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7629079A JPS561076A (en) 1979-06-19 1979-06-19 Correcting method for light source fluctuation in pattern generator

Publications (1)

Publication Number Publication Date
JPS561076A true JPS561076A (en) 1981-01-08

Family

ID=13601191

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7629079A Pending JPS561076A (en) 1979-06-19 1979-06-19 Correcting method for light source fluctuation in pattern generator

Country Status (1)

Country Link
JP (1) JPS561076A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6091993A (en) * 1983-09-01 1985-05-23 ジエネテイツクス・インスチチユ−ト・インコ−ポレ−テツド Production of l-amino acids by amino group transfer
JPS6198962U (en) * 1984-12-05 1986-06-25

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6091993A (en) * 1983-09-01 1985-05-23 ジエネテイツクス・インスチチユ−ト・インコ−ポレ−テツド Production of l-amino acids by amino group transfer
JPS6338193B2 (en) * 1983-09-01 1988-07-28 Jeneteitsukusu Inst Inc
JPS6198962U (en) * 1984-12-05 1986-06-25

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