JPS5758111A - Optical system having focus detector - Google Patents

Optical system having focus detector

Info

Publication number
JPS5758111A
JPS5758111A JP13411380A JP13411380A JPS5758111A JP S5758111 A JPS5758111 A JP S5758111A JP 13411380 A JP13411380 A JP 13411380A JP 13411380 A JP13411380 A JP 13411380A JP S5758111 A JPS5758111 A JP S5758111A
Authority
JP
Japan
Prior art keywords
optical axis
glass block
passes
optical member
infocus
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
JP13411380A
Other languages
Japanese (ja)
Inventor
Kazuo Tanaka
Yukichi Niwa
Mitsutoshi Owada
Yasuo Ogino
Noboru Yukimura
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 JP13411380A priority Critical patent/JPS5758111A/en
Priority to DE19813138066 priority patent/DE3138066A1/en
Publication of JPS5758111A publication Critical patent/JPS5758111A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/30—Systems for automatic generation of focusing signals using parallactic triangle with a base line
    • G02B7/32—Systems for automatic generation of focusing signals using parallactic triangle with a base line using active means, e.g. light emitter

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To realize compact constitution by arranging an optical member for photoconduction for guiding luminous flux from a light emitting means to an infocus optical member by utilizing total reflection at the image field side of the infocus optical member. CONSTITUTION:A glass block 16 is provided at right angles to an optical axis and on it, half-mirrors 17 and 115 are arranged slanting at a prescribed angle to the optical axis 12. Luminous flux emitted from a light emitting device 18 passes through one terminal surface 19 of the glass block 16 and, after totally reflected by surfaces 110 and 111 where image pickup light perpendicular to the optical axis of the glass block 16 passes, is reflected by a half-mirror 17 arranged at a prescribed angle; and then it passes through a surface 110 at an internal object side of a surface perpendicular to the optical axis of the glass block 16 and further passed through a focusing lens part to be projected upon an object 112.
JP13411380A 1980-09-25 1980-09-25 Optical system having focus detector Pending JPS5758111A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP13411380A JPS5758111A (en) 1980-09-25 1980-09-25 Optical system having focus detector
DE19813138066 DE3138066A1 (en) 1980-09-25 1981-09-24 Optical system having a focus detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13411380A JPS5758111A (en) 1980-09-25 1980-09-25 Optical system having focus detector

Publications (1)

Publication Number Publication Date
JPS5758111A true JPS5758111A (en) 1982-04-07

Family

ID=15120757

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13411380A Pending JPS5758111A (en) 1980-09-25 1980-09-25 Optical system having focus detector

Country Status (1)

Country Link
JP (1) JPS5758111A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6455511A (en) * 1987-08-26 1989-03-02 Canon Kk Zoom lens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6455511A (en) * 1987-08-26 1989-03-02 Canon Kk Zoom lens

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