JPS55105229A - Focusing detector - Google Patents

Focusing detector

Info

Publication number
JPS55105229A
JPS55105229A JP1201579A JP1201579A JPS55105229A JP S55105229 A JPS55105229 A JP S55105229A JP 1201579 A JP1201579 A JP 1201579A JP 1201579 A JP1201579 A JP 1201579A JP S55105229 A JPS55105229 A JP S55105229A
Authority
JP
Japan
Prior art keywords
focusing
register
signal
optical system
data
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
JP1201579A
Other languages
Japanese (ja)
Inventor
Seiya Hori
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.)
MORIRIKA KK
Original Assignee
MORIRIKA KK
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 MORIRIKA KK filed Critical MORIRIKA KK
Priority to JP1201579A priority Critical patent/JPS55105229A/en
Publication of JPS55105229A publication Critical patent/JPS55105229A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To improve the responsiveness of focusing operation and ease the incorporation into a small-size camera by converting contrast to digital signal, compare the change in said signal with time and driving the focusing device.
CONSTITUTION: When a photographic lens system 8 and a focusing optical system 2 are in a focus position, the image of a detecting face 10 shows sharp contrast as compared to that at the non-focusing. When the focusing operation is started, a control pulse generator 18 generates the synchronizing pulses of a fixed period and an A/D conversion register 5 is inputted with the level signal of the generator 4 and stores the same as L or H level signal. A comparator 7 compares the contents of the data D1 of the register 5 and the data D2 of the register 6 and causes an LEd to light when D1>D2. This lighting light is applied to a control unit 20. The unit 20 drives a motor 12 in its forward running direction which in turn moves the optical system 2 and lens system 8 from, e.g., ∞ position to a near distance position.
COPYRIGHT: (C)1980,JPO&Japio
JP1201579A 1979-02-05 1979-02-05 Focusing detector Pending JPS55105229A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1201579A JPS55105229A (en) 1979-02-05 1979-02-05 Focusing detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1201579A JPS55105229A (en) 1979-02-05 1979-02-05 Focusing detector

Publications (1)

Publication Number Publication Date
JPS55105229A true JPS55105229A (en) 1980-08-12

Family

ID=11793760

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1201579A Pending JPS55105229A (en) 1979-02-05 1979-02-05 Focusing detector

Country Status (1)

Country Link
JP (1) JPS55105229A (en)

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