...反射透明的玻璃前兆-高纯阳极化椭圆镜面铝反射器-光学系统-四个反射透镜组成一个光束角2x10°变化到2x20°的可变焦系统（Zoompost）-沿着光学轴线移动一个透镜可调节图像尺寸-沿着光学轴线移动两个透镜可使图像变焦-沿着光学系统轴线移动光圈可是图像亮度均匀-GO...
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视觉测量系统，可变焦数字照相测量系统等图像测量方法。
Vision measurement system, but image measuring techniques and so on focal variation numeral photography measurement system.
本文介绍一种以液晶空间光调制器作为调制位相信息的衍射元件，获得可变焦长的菲涅耳透镜，以及该元件在光学成像系统中的应用。
A kind of diffraction element modulating phase information by LC space light modulator to get a zoom Fresnel lens, as well as the using of said element to optical imaging system, is introduced.
该系统可以通过可变焦工业摄像头采集清晰的塔机吊钩和重物图像，供塔机驾驶员观察；
This system provides high-quality images captured from industrial camera to both on-site operators through a monitor and managers through wireless GPRS network.
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