JPS5677865A - Optical reflection system - Google Patents

Optical reflection system

Info

Publication number
JPS5677865A
JPS5677865A JP15302579A JP15302579A JPS5677865A JP S5677865 A JPS5677865 A JP S5677865A JP 15302579 A JP15302579 A JP 15302579A JP 15302579 A JP15302579 A JP 15302579A JP S5677865 A JPS5677865 A JP S5677865A
Authority
JP
Japan
Prior art keywords
image
aperture
reflective surface
detection part
lens system
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
JP15302579A
Other languages
Japanese (ja)
Inventor
Hiromitsu Okada
Ikuo Mori
Takeshi Ishii
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.)
Tokyo Optical Co Ltd
Original Assignee
Tokyo Optical 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 Tokyo Optical Co Ltd filed Critical Tokyo Optical Co Ltd
Priority to JP15302579A priority Critical patent/JPS5677865A/en
Publication of JPS5677865A publication Critical patent/JPS5677865A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To realize a miniature, inexpensive system whose aperture adjustment is facilitated by performing the luminous photometry of a substance surface by forming a reflective surface in a semitransparent reflective surface and then by providing a light quantity detection part behind the semitransparent reflective surface. CONSTITUTION:To measure the brightness of subject surface P, light from subject surface P enters light quantity detection part 4 by way of image-forming lens system L, aperture 1 and semitransparent reflective surface 2. From the exposure obtained by light quantity detection part 4, the proper exposure for copying or photographing is determined to adjust aperture 1 automatically. In the copying or photographing, the light from subject surface P passes through image-forming lens system L and aperture 1, is reflected by semitransparent reflective surface 2 and passes through aperture 1 and image-forming lens system L to form its image on image surface Q.
JP15302579A 1979-11-28 1979-11-28 Optical reflection system Pending JPS5677865A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15302579A JPS5677865A (en) 1979-11-28 1979-11-28 Optical reflection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15302579A JPS5677865A (en) 1979-11-28 1979-11-28 Optical reflection system

Publications (1)

Publication Number Publication Date
JPS5677865A true JPS5677865A (en) 1981-06-26

Family

ID=15553310

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15302579A Pending JPS5677865A (en) 1979-11-28 1979-11-28 Optical reflection system

Country Status (1)

Country Link
JP (1) JPS5677865A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS597354A (en) * 1982-07-05 1984-01-14 Canon Inc Density detector of original for copying machine
JPS59116762A (en) * 1982-12-24 1984-07-05 Canon Inc Image density controller in image forming device
US6205161B1 (en) * 1996-03-01 2001-03-20 Agfa-Gevaert Aktiengesellschaft Method and device for operating a laser diode

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5393834A (en) * 1977-01-28 1978-08-17 Ricoh Co Ltd Exposure illuminance detector of copying machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5393834A (en) * 1977-01-28 1978-08-17 Ricoh Co Ltd Exposure illuminance detector of copying machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS597354A (en) * 1982-07-05 1984-01-14 Canon Inc Density detector of original for copying machine
JPH0357465B2 (en) * 1982-07-05 1991-09-02 Canon Kk
JPS59116762A (en) * 1982-12-24 1984-07-05 Canon Inc Image density controller in image forming device
US6205161B1 (en) * 1996-03-01 2001-03-20 Agfa-Gevaert Aktiengesellschaft Method and device for operating a laser diode

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