JPS5617328A - Single-lens reflex camera - Google Patents

Single-lens reflex camera

Info

Publication number
JPS5617328A
JPS5617328A JP9390279A JP9390279A JPS5617328A JP S5617328 A JPS5617328 A JP S5617328A JP 9390279 A JP9390279 A JP 9390279A JP 9390279 A JP9390279 A JP 9390279A JP S5617328 A JPS5617328 A JP S5617328A
Authority
JP
Japan
Prior art keywords
light
reflective surface
slit
reflected
main body
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
JP9390279A
Other languages
Japanese (ja)
Inventor
Katsumi Terada
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.)
Olympus Corp
Original Assignee
Olympus 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP9390279A priority Critical patent/JPS5617328A/en
Publication of JPS5617328A publication Critical patent/JPS5617328A/en
Pending legal-status Critical Current

Links

Landscapes

  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE: To improve focusing precision by composing a movable mirror of a main body that has a transmissive part, allowing part of incident light to transmit it, away from an optical axis and a reflective surface for transmission prevention on the front surface of the main body.
CONSTITUTION: Light having passed through taking lens 2 is reflected on reflective surface 4b by movable mirror 4 and, at the same time, divided into light viewed through finder 9 and light led to detector 8 via focusing mirror 5 after transmitting part of the transmissive part of main body 4a by way of slit 4c of reflective surface 4b. Part of the light passing through slit 4c of reflective surface 4b is reflected on the back surface of movable mirror 4, but it is almost reflected by reflective surface 4b on the front surface of mirror 4, so that light transmitted from the front surface will nearly be eliminated. Slit 4c and the optical axis are positioned away from each other and light when the aperture is fully opened or close to it can be photodetected. The quantity of photodetected light of photodetector 8 can be increased, so that the focusing precision can be improved.
COPYRIGHT: (C)1981,JPO&Japio
JP9390279A 1979-07-24 1979-07-24 Single-lens reflex camera Pending JPS5617328A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9390279A JPS5617328A (en) 1979-07-24 1979-07-24 Single-lens reflex camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9390279A JPS5617328A (en) 1979-07-24 1979-07-24 Single-lens reflex camera

Publications (1)

Publication Number Publication Date
JPS5617328A true JPS5617328A (en) 1981-02-19

Family

ID=14095406

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9390279A Pending JPS5617328A (en) 1979-07-24 1979-07-24 Single-lens reflex camera

Country Status (1)

Country Link
JP (1) JPS5617328A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52110033A (en) * 1976-03-12 1977-09-14 Canon Inc Single lens reflex camera

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52110033A (en) * 1976-03-12 1977-09-14 Canon Inc Single lens reflex camera

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