星载离轴多光谱相机焦平面的装调与检测

针对某离轴多光谱相机焦平面高精度的装调要求,设计了焦平面组件,阐述了装调、检测的仪器设备和方法。首先将焦平面组件安装至镜头,测量并解算出CCD光敏面的角度和位移偏差,接着根据偏差确定调整垫修研量,进行初次修垫并重新安装,然后利用调整工装微调CCD姿态至满足指标要求,调整垫处打销钉定位,最后根据拟合出的最佳焦平面位置再次修研调整垫,利用销钉复位完成装调工作。检测结果表明,相机的CCD光敏面相对于设计焦平面三维角度偏差分别为Δα=-6.7″,Δβ=1.9',Δγ=13.2″,三维位移偏差分别为Δx=-0.004 mm,Δy=0.006 mm,Δz=-0.070 mm,相机四谱段、全视场MTF优于0.25,满足设计和装调要求。测量和解算误差分析表明,所用的设备与方法能够满足装调精度的要求,可以为此类相机的研制提供一定的技术参考。     

Acousto-Optic Tunable Filter: A New Generation onochromator and more

ABSTRACT

The acousto-optic tunable filter is a compact, all solid state electronic monochromator. It is based on the acousto-optic interaction in an anisotropic crystal. Compared to conventional grating monochromtors, the AOTF has no moving parts, wider spectral tuning range (from UV though visible and near-IR to IR), higher throughput, higher resolution (few angstroms), faster scanning speed (μs) and imaging capability. These features make it possible to use the filter to develop novel instruments which are not possible otherwise. The instrumentation development and unique advantages of such AOTF based instruments including a multidimensional fluorimeter, detectors for HPLC and flow injection analysis, and a multispectral imaging instrument are described.