JPS5726813A - Focusing detector - Google Patents

Focusing detector

Info

Publication number
JPS5726813A
JPS5726813A JP10180780A JP10180780A JPS5726813A JP S5726813 A JPS5726813 A JP S5726813A JP 10180780 A JP10180780 A JP 10180780A JP 10180780 A JP10180780 A JP 10180780A JP S5726813 A JPS5726813 A JP S5726813A
Authority
JP
Japan
Prior art keywords
signal
focusing
sized
accuracy
pair
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
JP10180780A
Other languages
Japanese (ja)
Inventor
Haruhiko Momose
Toshiaki Takahashi
Yasushi Hoshino
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta 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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP10180780A priority Critical patent/JPS5726813A/en
Priority to US06/281,890 priority patent/US4441810A/en
Priority to DE19813127786 priority patent/DE3127786A1/en
Publication of JPS5726813A publication Critical patent/JPS5726813A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/40—Optical focusing aids

Abstract

PURPOSE:To obtain a device which is small-sized and high in accuracy, by using a PSD as a focusing detection element. CONSTITUTION:An optical image of an object O forms an image in a pair of PSD1 and PSD2 placed on the conjugate surface to a film F through a moving mirror QRM, a pair of wedge type optical elements STP and a semitransparent mirror HM. Their outputs I11, I12 and I21, I22 are inputted to position detecting circuits PDC1, PDC2, and a ratio I01 signal to a sum signal of a difference signal of I11 and I12, and an I02 signal corresponding to said signal are provided to a differential amplifier A4. When a servomotor M is driven so that its output IM becomes minimum, focusing is obtained. In this way, a device which is small-sized and high in accuracy is obtained.
JP10180780A 1980-07-15 1980-07-23 Focusing detector Pending JPS5726813A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP10180780A JPS5726813A (en) 1980-07-23 1980-07-23 Focusing detector
US06/281,890 US4441810A (en) 1980-07-15 1981-07-09 Range finder
DE19813127786 DE3127786A1 (en) 1980-07-15 1981-07-14 DISTANCE KNIFE, ESPECIALLY FOR CAMERAS OR THE LIKE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10180780A JPS5726813A (en) 1980-07-23 1980-07-23 Focusing detector

Publications (1)

Publication Number Publication Date
JPS5726813A true JPS5726813A (en) 1982-02-13

Family

ID=14310401

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10180780A Pending JPS5726813A (en) 1980-07-15 1980-07-23 Focusing detector

Country Status (1)

Country Link
JP (1) JPS5726813A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5983962A (en) * 1982-10-29 1984-05-15 Kamaya Kagaku Kogyo Kk Decoration of glass product

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5983962A (en) * 1982-10-29 1984-05-15 Kamaya Kagaku Kogyo Kk Decoration of glass product

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