Testing method used for evaluating visible light smoke screen shadowing effect
A test method and technology for shading effect, applied in the directions of spectrometry/spectrophotometry/monochromator, optical radiation measurement, measuring device, etc., which can solve the problem of insufficient and accurate shading effect of smoke screen, single-point and single-channel measurement Randomness, etc.
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[0024] As shown in the figure, during the test, the AOTF Acousto-Optic Tunable Filter Spectral Imager 2 continuously collects the benchmark spectral image through the smoke screen 1, and synthesizes the image at the data processing terminal 3 with the real-color image without smoke screen 1 collected before the smoke screen 1 is deployed. For comparison, evaluate whether the smoke screen 1 forms effective shielding.
[0025] The spatial geometric dimension of smoke screen 1 is D:
[0026]
[0027] In the formula, N is the number of image pixels occupied by the target, L is the distance between the test equipment and the target, d is the pixel size of the detector, f is the focal length of the CCD camera,
[0028] In actual use, there is an error in the focal length f of the AOTF Acousto-Optic Tunable Filter Spectral Imager 2, plus the distance between the test equipment and the measured target, that is, the working distance L is changing every time it is tested. It is nece...
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