The theory of orthogonal wave-front coding for range information extraction from a single image in a passive way is
introduced. A cosine rectangular separable optical mask was chose in the system. The expression of the diffractionlimited
system's OTF for the value of defocus was deduced by method of the Ambiguity Function. The system's
accuracy was analyzed using the Fisher information matrix and an evaluation of the Cramer-Rao bound. Simulation
experiment results show the orthogonal method was feasible. An experimental system was also built, and results are
given.
Analyze the theory of testing detector's response sensitivity. In accordance with the synthetical requisition of
full-automatic testing of the laser fuze, the response sensitivity of infrared detector in the laser fuze were testing by the
way of the double light route. The spectral optical system divided the light beam into two beams which were same size,
shape and even after the laser light beam were collimated and reformed. The two light rayed the standard detector and
unknown detector separately. After we adopted the technology of optical system resisting the stray light, the
oscilloscope achieved the response output of two detectors simultaneously. The output data were transferred into the
computer by GPIB. It realized the accurate measurement of the detector's response sensitivity. The repeatability of the
testing was smaller than 5%. So it was in keeping with the technical target of the laser fuze.
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