JPS55166773A - Optical reader - Google Patents

Optical reader

Info

Publication number
JPS55166773A
JPS55166773A JP7530079A JP7530079A JPS55166773A JP S55166773 A JPS55166773 A JP S55166773A JP 7530079 A JP7530079 A JP 7530079A JP 7530079 A JP7530079 A JP 7530079A JP S55166773 A JPS55166773 A JP S55166773A
Authority
JP
Japan
Prior art keywords
light
light source
detecting
rotary mirror
accurately
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
JP7530079A
Other languages
Japanese (ja)
Inventor
Kimio Yatsunami
Yoshihiko Iwamoto
Seiji Amazaki
Shigeo Terajima
Takaaki Okamoto
Shoichi Yasuda
Masahiro Horii
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.)
Sharp Corp
Original Assignee
Sharp 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
Application filed by Sharp Corp filed Critical Sharp Corp
Priority to JP7530079A priority Critical patent/JPS55166773A/en
Publication of JPS55166773A publication Critical patent/JPS55166773A/en
Pending legal-status Critical Current

Links

Landscapes

  • Mechanical Optical Scanning Systems (AREA)
  • Character Input (AREA)

Abstract

PURPOSE:To keep the quantity of light from a light source constant at any time by accurately detecting the quantity of the light by exercising control over the quantity of the light while detecting the quantity of the light from the light source, by detecting the quantity of reflected light from a rotary mirror directly in an optical reader which reads core information. CONSTITUTION:Light from light source 1 reaches code information appended to article 7 placed on scanning window 6 by way of reflecting plate 2, rotary mirror 4, and fixed mirrors 5a-5n arranged on a semicircle track centering on rotary mirror 4, and the information is read. Light-quantity detecting method 12, arranged among fixed mirrors 5a-5n, detects the quantity of light arriving via rotary mirror 4 and its detection signal is input to light-quantity control method 14 via sample holding and feedback circuit 13 to control the quantity of the light of light source 1. Consequently, the quantity of the light can accurately be detected without any loss of the arrival light and the quantity of the light of the light source can be kept constant at any time.
JP7530079A 1979-06-14 1979-06-14 Optical reader Pending JPS55166773A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7530079A JPS55166773A (en) 1979-06-14 1979-06-14 Optical reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7530079A JPS55166773A (en) 1979-06-14 1979-06-14 Optical reader

Publications (1)

Publication Number Publication Date
JPS55166773A true JPS55166773A (en) 1980-12-26

Family

ID=13572250

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7530079A Pending JPS55166773A (en) 1979-06-14 1979-06-14 Optical reader

Country Status (1)

Country Link
JP (1) JPS55166773A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5870377A (en) * 1981-10-21 1983-04-26 Sumitomo Electric Ind Ltd Light quantity controlling system of optical character reader

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5870377A (en) * 1981-10-21 1983-04-26 Sumitomo Electric Ind Ltd Light quantity controlling system of optical character reader

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