Title:
【発明の名称】ビデオカメラの自動焦点調節装置及びその方法
Document Type and Number:
Japanese Patent JP2763828
Kind Code:
B2
Abstract:
a light emitting element (10) providing a light beam for distance measuring, on actuation by a driver (100); a photosensitive element (20) having two channels, in which photocurrent signals are generated in dependence on the position of an impingement point of light from the element; two voltage-current converters (30,40) processing the photocurrent signals of each channel; a time division selector (50) processing the output signals of the two converters; a filter (60) through which the selected output signal is passed; an integrator (70) amplifying the output signal of the filter; a comparator (80) outputing a level signal according to the compared value by comparing output signal of the integrator (70) with the set voltage signal; and a microcomputer(90) controlling the focussing controlling motor having its owm driver (110).
Inventors:
BIN SHUNKI
TEI SHURETSU
TEI SHURETSU
Application Number:
JP40764790A
Publication Date:
June 11, 1998
Filing Date:
December 27, 1990
Export Citation:
Assignee:
SANSEI DENSHI KK
International Classes:
G01C3/06; G01B11/00; G02B7/32; G03B13/36; H04N5/232; (IPC1-7): G03B13/36; G01B11/00; G01C3/06; G02B7/32; H04N5/232
Domestic Patent References:
| JP60253811A | ||||
| JP6256911A | ||||
| JP1116510A | ||||
| JP1140116U |
Attorney, Agent or Firm:
Kobori Masashi