| 摘要 |
A device for the heterodyne detection of the image of targets illuminated by a laser, wherein the target reflects a wave SIGMA 1, which is amplified in an included refractive index variation medium also illuminated by a reference wave SIGMA R derived from the laser to produce an amplified wave SIGMA 2. A portion of the wave SIGMA 1 prior to amplification is directed incident on a frequency shifter to produce frequency shifted wavefront SIGMA 10. Wavefront SIGMA 2 and the frequency-shifted wavefront SIGMA 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. |
