公开(公告)号：US5278402A

公开(公告)日：1994-01-11

申请号：US73953

申请日：1993-06-09

申请人： Steven J. Wein

发明人： Steven J. Wein

IPC分类号： G01J3/28 ,  G01J3/427 ,  G01N21/41 ,  G01J1/20 ,  G01J3/50

CPC分类号： G02B27/0031 ,  G01N21/41 ,  G02B26/0883 ,  G01J3/2803 ,  G01J3/427 ,  G01N2021/4106 ,  G01N2021/4113 ,  G02B5/04

摘要： An optical dispersion sensor for sensing optical dispersion introduced by the atmosphere in near real-time and an optical system using the dispersion sensor to compensate for atmospheric dispersion are described. The input signal to the dispersion sensor is the image of the scene being viewed by a scanning optical system. The image of the scene is passed through an aperture near the image plane of the optical system and then onto at least two individual light detecting systems. One of the detecting systems is adapted to detect light of a first wavelength band. The other detecting system detects light of a second wavelength band. The sensor computes the relative time delay between the signals derived from the two detecting systems. The time delay indicates the spectral dispersion introduced by the atmosphere. In an optical system, a control circuit adjusts a variable dispersive element contained within the optical system to compensate for the atmospheric dispersion by driving the relative time delay between signals towards zero.

摘要翻译： 描述了用于感测近乎实时的大气引入的光学色散的光学色散传感器和使用该色散传感器补偿大气分散的光学系统。 到色散传感器的输入信号是由扫描光学系统观看的场景的图像。 场景的图像通过光学系统的图像平面附近的孔，然后通过至少两个单独的光检测系统。 检测系统之一适于检测第一波长带的光。 另一检测系统检测第二波长带的光。 传感器计算从两个检测系统得到的信号之间的相对时间延迟。 时间延迟表示由大气引入的光谱色散。 在光学系统中，控制电路调节光学系统中包含的可变色散元件，以通过将信号之间的相对时间延迟驱动到零来补偿大气分散。