JPS5786815A - Photoscanner - Google Patents

Photoscanner

Info

Publication number
JPS5786815A
JPS5786815A JP55163048A JP16304880A JPS5786815A JP S5786815 A JPS5786815 A JP S5786815A JP 55163048 A JP55163048 A JP 55163048A JP 16304880 A JP16304880 A JP 16304880A JP S5786815 A JPS5786815 A JP S5786815A
Authority
JP
Japan
Prior art keywords
parts
hologram
optically
dividing
circumferential direction
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.)
Granted
Application number
JP55163048A
Other languages
Japanese (ja)
Other versions
JPS615130B2 (en
Inventor
Hideto Iwaoka
Akira Ote
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Electric Corp
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works 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 Yokogawa Electric Corp, Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Electric Corp
Priority to JP55163048A priority Critical patent/JPS5786815A/en
Publication of JPS5786815A publication Critical patent/JPS5786815A/en
Publication of JPS615130B2 publication Critical patent/JPS615130B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/10—Scanning systems
    • G02B26/106—Scanning systems having diffraction gratings as scanning elements, e.g. holographic scanners

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Holo Graphy (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To improve resolution by correcting an out-of-focus image by dividing a cylindrical hologram into parts optically in its circumferential direction so that photoscanning is done more than once in a single turn, and dividing each part into more than one part and making them different in imaging distance. CONSTITUTION:A cylindrical rotary hologram 1 is divided optically in its circumferential direction into, for example, ten parts 1a-1j, which are each divided optically into three parts 1, 2 and 3, thus obtaining mutually independent partial hologram. The respective partial holograms 1, 2 and 3 differ slightly in imaging distance from one another, and light spots P projected from those holograms on a projection surface 3 within the focus depth of imaging invariably free of curve distortion, so that the width of irradiation with luminous flux having small width from a spot light source 4 is obtained.
JP55163048A 1980-11-19 1980-11-19 Photoscanner Granted JPS5786815A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55163048A JPS5786815A (en) 1980-11-19 1980-11-19 Photoscanner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55163048A JPS5786815A (en) 1980-11-19 1980-11-19 Photoscanner

Publications (2)

Publication Number Publication Date
JPS5786815A true JPS5786815A (en) 1982-05-31
JPS615130B2 JPS615130B2 (en) 1986-02-15

Family

ID=15766182

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55163048A Granted JPS5786815A (en) 1980-11-19 1980-11-19 Photoscanner

Country Status (1)

Country Link
JP (1) JPS5786815A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0588509A2 (en) * 1992-09-18 1994-03-23 Fujitsu Limited Stereoscopic display apparatus
WO2003012382A1 (en) * 2001-07-31 2003-02-13 Iatia Imaging Pty Ltd Optical system and method for producing in focus and defocused images

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0588509A2 (en) * 1992-09-18 1994-03-23 Fujitsu Limited Stereoscopic display apparatus
EP0588509A3 (en) * 1992-09-18 1996-05-29 Fujitsu Ltd Stereoscopic display apparatus
WO2003012382A1 (en) * 2001-07-31 2003-02-13 Iatia Imaging Pty Ltd Optical system and method for producing in focus and defocused images

Also Published As

Publication number Publication date
JPS615130B2 (en) 1986-02-15

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