一种新型选通象增强高速电影系统

为了实现对“弱、小、多、快”目标的跟踪测量,我们研制了一种选通象增强高速电影摄影系统。它是集激光象增强技术、激光照明技术、电子选通技术及高速电影摄影技术于一体的新型系统,它具有光增益高,成象质量好,可探测距离远等特点。 该系统采用了带选通的二代象增强器;采用了电子快门,其曝光时间在1μs—300μs可调,频率在1—100帧/秒可调;采用了非透镜耦合的方式,解决了胶片与耦合面板之间的静电放电问题,以及高速运转时它们之间的磨擦问题,采用了小数值孔径耦合面板,改善了耦合分辨率,采用了高性能的间歇输片机构,实现了胶片的高速间歇运动。 本文还介绍了该系统的静态和动态测试结果,以及在激光照明下的测试结果。

A NEW KIND OF HIGH SPEED CINECAMERA WITH A GATE INTENSIFIER

In order to track and measure the weak, small, multiple and high speed moving targets, a new kind of high speed cinecamera with a gated intensifier has been developed. The techniques of image intensifying, laser illuminating, electricical gating and high speed photographing have been used, so the cinecamera has gained theadvantages of high light gain, good imaging quality and long measuring distance.In this system, a gated intensifier and electrical gate with a adjustable gating time of 1-300μs and adjustable photography frequency of 1-100 frames per second has been used. It is the non-lens coupling method that we have solved the , two problems-electrostatic discharge and dynamic friction between the film and the optic fiber faceplate. The resolution has been improved by using a coupler of optic-fiber faceplate of low numerical aperture. The highspeed intermission motion of the film has been operated because of the intermission mechanism for transporting film being used.The results of static, dynamic experiment and experiment with laser illuminator are also presented in the paper.