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Apparatus for taking photographs at times of minimum image motion

阅读:881发布:2023-07-23

专利汇可以提供Apparatus for taking photographs at times of minimum image motion专利检索,专利查询,专利分析的服务。并且Image velocity detection means are incorporated into photographic apparatus and are utilized to activate the camera at a time of minimum image motion. Light from an object of interest passes through a photographic lens and is imaged on a mask having a periodic transmission. As the image moves across the mask, the total light reaching an integrating photodetector directly behind the mask varies as a function of time and image velocity. This variation sets up a proportional electric current which is analyzed to determine the instantaneous image velocity. When a minimum instantaneous velocity is detected a signal is generated which trips the camera shutter.,下面是Apparatus for taking photographs at times of minimum image motion专利的具体信息内容。

1. A photographic system comprising: a camera having a photographic lens member, a camera operating mechanism, an image velocity detector operable through said photographic lens member and having an integrated output signal that is a continuous measure of image motion, and actuating means responsive to said image velocity detector output signal adapted to actuate said camera operating mechanism at a given output signal threshold value, said image velocity detector comprising a photodetector having a periodic transmission mask disposed over its light detecting surface, and, said actuating means including means for periodically sampling the output signal of said image velocity detector and an electronic filter having a frequency pass band adapted to permit actuation in response to signal samples representing minimum object motion only.
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