JPS5581320A - Optical information reader - Google Patents

Optical information reader

Info

Publication number
JPS5581320A
JPS5581320A JP15518478A JP15518478A JPS5581320A JP S5581320 A JPS5581320 A JP S5581320A JP 15518478 A JP15518478 A JP 15518478A JP 15518478 A JP15518478 A JP 15518478A JP S5581320 A JPS5581320 A JP S5581320A
Authority
JP
Japan
Prior art keywords
light
light beam
imaging lens
beam splitter
deflector
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
JP15518478A
Other languages
Japanese (ja)
Inventor
Masafumi Yokota
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP15518478A priority Critical patent/JPS5581320A/en
Publication of JPS5581320A publication Critical patent/JPS5581320A/en
Pending legal-status Critical Current

Links

Landscapes

  • Mechanical Optical Scanning Systems (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Optical Head (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

PURPOSE: To eliminate the effect of external light by providing a beam splitter which constitutes a photo detecting system between a light beam generator and a light deflector.
CONSTITUTION: A beam splitter 9 which constitutes a photo detecting system 13 together with an imaging lens 10, aperture 11 and photoelectric transducer 12 is disposed between the imaging lens 5 constituting a scanning system 8 together with a light beam generator 1 and collimator lens 2 and a light deflector 6. With this arrangement, the light beam generated from the light beam generator 1 undergoes changing of light beam diameter and paralleling in the collimator lens 2, hence it is radiated via the imaging lens 5, beam splitter 9 and light deflector 6 onto an information recording surface 7, the reflected light whereof enters the photoelectric transducer 12 by way of the light deflector 6, beam splitter 9, imaging lens 10 and aperture 11. Hence, the photo detecting range positions always on the flying point of the light beam and becomes approximately of the same diameter as the light beam diameter, thus no longer receiving the effect of external light and permitting reading of high accuracy without the need for covering the entire part of the device with a dark box.
COPYRIGHT: (C)1980,JPO&Japio
JP15518478A 1978-12-16 1978-12-16 Optical information reader Pending JPS5581320A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15518478A JPS5581320A (en) 1978-12-16 1978-12-16 Optical information reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15518478A JPS5581320A (en) 1978-12-16 1978-12-16 Optical information reader

Publications (1)

Publication Number Publication Date
JPS5581320A true JPS5581320A (en) 1980-06-19

Family

ID=15600312

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15518478A Pending JPS5581320A (en) 1978-12-16 1978-12-16 Optical information reader

Country Status (1)

Country Link
JP (1) JPS5581320A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5839915A (en) * 1981-09-02 1983-03-08 Canon Inc Measuring apparatus of spectral sensitivity of optical sensor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5839915A (en) * 1981-09-02 1983-03-08 Canon Inc Measuring apparatus of spectral sensitivity of optical sensor
JPH0549930B2 (en) * 1981-09-02 1993-07-27 Canon Kk

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