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用旋转盘遮光法拍摄出来的频闪负片常常存在两个问题,一是负片上的小球影像呈椭球形,即小球影像发虚;二是负片的反差不够,印放出来的照片不够清晰、鲜明。针对以上两个问题,我们在实验中采取了以下的办法来解决,取得了较明显的效果。一、解决小球影像发虚的问题拍摄出来的小球影像发虚,一般是由于在拍摄小球时曝光时间t过长。在旋转盘遮光法中,拍摄小球的曝光时间是由转盘来控制的,转盘如图附所示。当旋转盘的转速ω一定时,如这时小球影像发虚,不能一味地提高转盘的转速,虽然提高转速可以使小
There are two problems with stroboscopic negatives shot with the rotating disk shading method. One is that the image of the ball on the negative is ellipsoidal, that is, the image of the ball is empty; the contrast of the negative is not enough, and the printed image is not clear enough, Clear. In response to the above two issues, we have taken the following measures to solve in the experiment, and achieved more obvious results. First, to solve the problem of virtual hair ball image Shot out of the ball image is generally due to the exposure time t is too long when shooting pellets. In the rotating disk shading method, the exposure time of the shot pellet is controlled by the turntable as shown in the attached figure. When the rotational speed of the turntable ω is constant, such as when the ball image is made faint, can not blindly increase the rotational speed of the turntable, although increasing the rotational speed can make small