,申请号FR19690009803-传众专利搜索

申请公布号：FR2005370(A1)

申请号：FR19690009803

申请日期：1969.04.01

申请公布日期：1969.12.12

申请人：

EASTMAN KODAK CY

分类号：G03B7/16;G03B15/05;(IPC1-7):03B7/00

主分类号：G03B7/16

摘要：<p>1,256,280. Flash exposure control. EASTMAN KODAK CO. March 27, 1969 [April 2, 1968], No.16036/69. Heading G2A. A pre-exposure flash sets the diaphragm for the main flash. The low-intensity pre-exposure flash is detected by the photo-resistive cell 1, the signal generated amplified at 2, the effect of the ambient illumination filtered out at 3, and galvanometer 4 deflected accordingly. The attached diaphragm vane 5 has a tapered aperture 8 which moves across the camera lens 9 from right to left, and is then retained in the set position by a pawl and ratchet arrangement 6, 7. The main flash exposure, whose intensity is a known multiple of that of the pre-exposure flash, is made immediately following. In the modification of Fig. 6 (not shown), the movement of the vane 5 at the same time actuates a rack and pinion arrangement which controls a focusing movement of the camera lens.</p>