AUTOMATIC FOCUSING DEVICE
申请(专利)号： JP19860203600
专利号： JPS6360416A 主分类号： G02B7/32
申请权利人： KONICA CORP 公开国代码： JP 优先权国家： JP
摘 要：
PURPOSE:To obtain an automatic
focusing device which can execute a lens control at a high speed, and is suitable for continuous photographic and a tracking operation at a high speed, by measuring a shift amount of a position of a
photographic lens and a focused position by interlocking a distance measuring element and the photographic lens, and moving the photographic lens until a result which has been detected by a detecting device coincides.
CONSTITUTION:Based on a shift amount which has been obtained by measuring a distance in advance, a photographic lens is moved in the direction where its shift amount becomes zero, and its moving extent is determined by a fact that a result of detection of a detecting device
coincides with its shift amount. That is to say, the moving extent of the
photographic lens 10 is detected by a rotary encoder 13 which has been
provided on a revolving shaft of a motor 12, and in a sequence controller 9, a shift
申请日： 1986-09-01 公开公告日： 1988-03-16
分类号： G02B7/32;
G03B3/10; G03B13/36 发明设计人： KATSUMURA
NOBUO 申请国代码： JP
优先权： 19860901 JP
20360086
摘 要 附 图：
amount N of a focus in counted down by '1' each with respect to a prescribed moving extent. The movement of the photographic lens 10 is continued until the shift amount N of the focus becomes '0', and at the time of N=0, a motor stop signal is outputted from the sequence controller 9 and the motor 12 is stopped. 主权项：
权 利 要 求 说 明 书
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AUTOMATIC FOCUSING DEVICE
