Study on verification device of screen spatial location parameters of sky screen target

For the original verification method of screen spatial location parameters of sky screen target is complex and low efficiency, the new verification device without disassembly the sky screen target is designed in this paper. The stroboscopic light sources including the LED, collimating lens, frosted glass and small aperture are designed, and the datum plane is precisely established. By setting the threshold method of oscilloscope, the translation stage moving distance relative to the datum plane are recorded, when the amplitude of the output signal of the sky screen target just reaches the preset threshold value. According to the formula, the screen spatial location parameters of sky screen target are achieved. Experimental results show that the calibration accuracy of screen surface space position parameters is better than ±1′, which is consistent with the theoretical error analysis. This verification device makes up for original verification deficiencies of disassembly sky screen target, saves test time, increases the verification efficiency of sky screen target, and has a broad range market demand.