TDICCD焦平面的机械交错拼接

Mechanical Interleaving Assembly of TDICCD Focal Plane

大视场高分辨力成像是遥感器发展的一个重要方向,成像焦面长度也越来越大,时间延时积分型电荷耦合器件(TDICCD)以良好的成像性能在遥感器上得到广泛的应用,对TDICCD探测器拼接以获得大焦面就变得越来越重要。一般光学拼接方法长度受到材料和胶合制约,且引入色差,而直接拼接方法有成像缺陷,为此提出了可消除这些缺陷的TDICCD机械交错拼接的新方法。在长工作距显微镜光学放大,电十丝校准,精密负压吸附气浮导轨和精密滑台移动定位的拼接装置上,对空间上相互错开的两行TDICCD用机械微调的方法实现了400 mm长的焦平面上TDICCD间的位置拼接精度2.9μm,保证了成像时各片TDICCD间精确的位置关系,通过电子学对接的图像移位处理方法,达到了无缝的成像效果。

There is a developing trend of wide field of view and high resolution for the remote sensor, and the imaging focal plane is longer and longer. TDICCD has been widely used in the field of the remote sensor with its good imaging performance, and it is more and more important to achieve large focal plane for TDICCD assembly. The conventional optical assembly length is limited by glass material and glass glue, moreover it introduces chromatic aberration, and the directive assembly will descend the imaging quality. A new assembly method called mechanical interleaving assembly of TDICCD focal plane, which eliminates the above defects, is put forward. Using mechanical tangent-screws adjusting method, the assembly of two TDICCDs staggerd in space is finished on the apparatus which is composed of a long work-distance magnifying microscope, a fine collimating reticle, a negative-pressure adsorption air float guide and precision slidway. The assembly focal plane length reaches 400 mm and the measuring error is not greater than 2.9 μm. The relationship of positions of TDICCDs is ensured, and the image displacement disposed method of electronic abutting joint zero clearance imaging picture is achieved.