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    • 85. 发明授权
    • Device for the heterodyne detection of an optical image
    • 用于外差检测光学图像的装置
    • US4491867A
    • 1985-01-01
    • US421776
    • 1982-09-23
    • Jean-Pierre Huignard
    • Jean-Pierre Huignard
    • G01J9/04G02F1/03G03H1/00
    • G03H1/00G01J9/04G02F1/0338
    • A device for the heterodyne detection of the image of targets illuminated by a laser, wherein the target reflects a wave .SIGMA..sub.1, which is amplified in an included refractive index variation medium also illuminated by a reference wave .SIGMA..sub.R derived from the laser to produce an amplified wave .SIGMA..sub.2. A portion of the wave .SIGMA..sub.1 prior to amplification is directed incident on a frequency shifter to produce frequency shifted wavefront .SIGMA..sub.10. Wavefront .SIGMA..sub.2 and the frequency-shifted wavefront .SIGMA..sub.10 are directed incident on the same partially reflection mirror to interfere with one another and the resultant beat interference wave is focused on a matrix of photodetectors and then filtered. This device has application to infrared image detection.
    • 用于外差检测由激光照射的目标的图像的装置,其中所述目标反射波SIGMA1,所述波SIGMA 1在包括的折射率变化介质中被放大,所述折射率变化介质也被从所述激光器得到的参考波SIGMA R所照射,以产生 放大波SIGMA2。放大之前的波形SIGMA 1的一部分被引导入射到移频器上以产生频移波前SIGMA 10.波前SIGMA 2和频移波前SIGMA 10被引导入射在相同的部分反射镜 相互干扰,产生的拍频干扰波集中在光电检测器的矩阵上,然后滤波。 该设备适用于红外图像检测。