发明名称 RANGE-FINDING DEVICE FOR CAMERA AND CAMERA
摘要 PURPOSE:To always perform the range-finding of an appropriate position on a photographic image plane by selecting a range-finding point outputting range-finding data submitted for the calculation of the driving amount of a photographing lens in accordance with at least one of print format, focal distance information and positional information on the photographic image plane. CONSTITUTION:A microprocessor 1, a format selection means 2, a vertical/horizontal detection means 3 detecting the vertical position and the horizontal position of the image plane at the time of photographing, a focal distance detection circuit 4 detecting the focal distance of a photographing lens, a light projecting element selecting and driving circuit 5 selecting and driving a light projecting element, and light projecting elements 14 to 18 fixed to a camera main body so that they may project light at a specified angle to the optical axis of the photographing lens are provided. For example, what range-finding point out of plural range-finding points, in accordance with the print format selected by the means 2, is to be used to calculate the driving amount of the photographing lens, is selected, and the range-finding point outputting the range- finding data submitted for the calculation of the driving amount of the photographing lens of the camera is selected in accordance with the selected print format.
申请公布号 JPH06201982(A) 申请公布日期 1994.07.22
申请号 JP19920358567 申请日期 1992.12.28
申请人 CANON INC 发明人 KITANI KAZUNARI;OTSUKA MASANORI
分类号 G02B7/28;G03B13/36;G03B17/28;(IPC1-7):G02B7/28 主分类号 G02B7/28
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