JPS6457237A - Optical scanner - Google Patents

Optical scanner

Info

Publication number
JPS6457237A
JPS6457237A JP21301387A JP21301387A JPS6457237A JP S6457237 A JPS6457237 A JP S6457237A JP 21301387 A JP21301387 A JP 21301387A JP 21301387 A JP21301387 A JP 21301387A JP S6457237 A JPS6457237 A JP S6457237A
Authority
JP
Japan
Prior art keywords
light
liquid crystal
crystal optical
optical shutter
light beam
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
JP21301387A
Other languages
Japanese (ja)
Other versions
JP2552877B2 (en
Inventor
Hideyuki Kawagishi
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP21301387A priority Critical patent/JP2552877B2/en
Publication of JPS6457237A publication Critical patent/JPS6457237A/en
Application granted granted Critical
Publication of JP2552877B2 publication Critical patent/JP2552877B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Liquid Crystal (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)

Abstract

PURPOSE:To eliminate the need of an expensive driver, and to execute driving with an inexpensive driver, by moving a light opening part and a light closing part of two liquid crystal optical shutters at an equal speed in the same direction, and allowing a light beam to scan at a high speed by length of a desired picture element portion. CONSTITUTION:In light beams radiated from a linear light source 5, a part of the light beams is obstructed by a light closing part of the first liquid crystal optical shutter 1a, and the other light beam reaches the second liquid crystal optical shutter 1b. By the second liquid crystal optical shutter 1b, the light beam in the advance direction is also obstructed, and the light beam transmits through an optical scanning part 6 by length (l) of a desired picture element portion. The light opening part and the light closing part of each liquid crystal optical shutter can be controlled by increasing the brightness and darkness of a liquid crystal molecule or the inversion area, along the longitudinal direction. Accordingly, boundaries 2a, 2b can be scanned in a state that the length (l) of the desired picture element portion remains held, by increasing the light closing part as for the first liquid crystal optical shutter 1a, and increasing the light opening part as for the second liquid crystal optical shutter 1b by following up said increase. In such a way, an expensive driver becomes unnecessary.
JP21301387A 1987-08-28 1987-08-28 Optical scanning device Expired - Fee Related JP2552877B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21301387A JP2552877B2 (en) 1987-08-28 1987-08-28 Optical scanning device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21301387A JP2552877B2 (en) 1987-08-28 1987-08-28 Optical scanning device

Publications (2)

Publication Number Publication Date
JPS6457237A true JPS6457237A (en) 1989-03-03
JP2552877B2 JP2552877B2 (en) 1996-11-13

Family

ID=16632054

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21301387A Expired - Fee Related JP2552877B2 (en) 1987-08-28 1987-08-28 Optical scanning device

Country Status (1)

Country Link
JP (1) JP2552877B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5045411A (en) * 1990-01-10 1991-09-03 P.M. Refining, Inc. Alloy compositions
KR100796611B1 (en) * 2006-11-06 2008-01-22 코닉시스템 주식회사 Annealing window
JP2019128376A (en) * 2018-01-22 2019-08-01 凸版印刷株式会社 Dimmer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5045411A (en) * 1990-01-10 1991-09-03 P.M. Refining, Inc. Alloy compositions
KR100796611B1 (en) * 2006-11-06 2008-01-22 코닉시스템 주식회사 Annealing window
JP2019128376A (en) * 2018-01-22 2019-08-01 凸版印刷株式会社 Dimmer

Also Published As

Publication number Publication date
JP2552877B2 (en) 1996-11-13

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees