JPS556345A - Focus detector - Google Patents

Focus detector

Info

Publication number
JPS556345A
JPS556345A JP7836678A JP7836678A JPS556345A JP S556345 A JPS556345 A JP S556345A JP 7836678 A JP7836678 A JP 7836678A JP 7836678 A JP7836678 A JP 7836678A JP S556345 A JPS556345 A JP S556345A
Authority
JP
Japan
Prior art keywords
focus
detecting
light
cut face
pentagonal prism
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
JP7836678A
Other languages
Japanese (ja)
Inventor
Yoshihiro Matsumoto
Akimasa Wakabayashi
Akiteru Kimura
Tetsuya Kimura
Kazuo Yamamoto
Hideko Takimoto
Shoji Yoshida
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 JP7836678A priority Critical patent/JPS556345A/en
Publication of JPS556345A publication Critical patent/JPS556345A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To take out focus-detecting-light from a pentagonal prism part with a simple constitution by providing the air layer formed at the junction faces of two light transmitting members to the reflecting part for taking out the focus-detecting- light.
CONSTITUTION: Lower part 22 of a pentagonal prism 21 is cut off along a cut face 23 and further this lower part 22 is separated to the two portions 22-1, 22-2 along the cut face 25 assuming an angle of 45° to the optical axis 24 of a finder system. After this, the prism is assembled to the original form so as to leave a bubble near the center of the cut face 25 and is bonded. In order to form such bubble, an adhesive agent is coated only on the portion 27 shown by diagonal lines. Such simple process enables the reflecting part directing the focus-detecting-light to a focus- detecting photo detector to be provided to the lower part of the pentagonal prism and enables the entire part of the device to be made lower in cost.
COPYRIGHT: (C)1980,JPO&Japio
JP7836678A 1978-06-28 1978-06-28 Focus detector Pending JPS556345A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7836678A JPS556345A (en) 1978-06-28 1978-06-28 Focus detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7836678A JPS556345A (en) 1978-06-28 1978-06-28 Focus detector

Publications (1)

Publication Number Publication Date
JPS556345A true JPS556345A (en) 1980-01-17

Family

ID=13659999

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7836678A Pending JPS556345A (en) 1978-06-28 1978-06-28 Focus detector

Country Status (1)

Country Link
JP (1) JPS556345A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4533226A (en) * 1982-03-30 1985-08-06 Robert Bosch Gmbh Still or motion picture camera

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4533226A (en) * 1982-03-30 1985-08-06 Robert Bosch Gmbh Still or motion picture camera

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