MOUNTAIN CLIMBING TYPE AUTOMATIC FOCUSING DEVICE,申请号JP19850209273-传众专利搜索

MOUNTAIN CLIMBING TYPE AUTOMATIC FOCUSING DEVICE

申请公布号：JPS6269218(A)

申请号：JP19850209273

申请日期：1985.09.20

申请公布日期：1987.03.30

申请人：

WEST ELECTRIC CO LTD

发明人：MAKINO HIROSHI;KIHARA TADAHARU;TAKASHIMA AKIRA

分类号：G02B7/36;G02B7/09;G02B7/32;G03B3/00;G03B13/36;H04N5/232

主分类号：G02B7/36

摘要：PURPOSE:To shorten the time required for focusing operation by limiting the range of movement of a focusing lens for focusing operation to a specific range corresponding to distance information obtained by an active distance measuring means. CONSTITUTION:A movement range setting means 14 regards a position where distance information outputted by an active distance measuring means 7 is given a margin on a common far point of accommodation side as the movement limit of the far point of accommodation side and a movement range is so set that the limit of a near point of accommodation side is regarded as the movement limit of design. Namely, far 2m distance information, a movement range setting means 14 operates so that the range shown by X between points C' having a margin on the far point of accommodation side for a point C, and A is set as the movement range of the focusing lens 2.