Long-focal-length large-aperture laser guide lens based on four-quadrant detector
A four-quadrant detector, laser-guided technology, applied in optics, instruments, filters, etc., can solve the problems of uneven light spot in the linear area, short detection distance, small light transmission, etc., to improve anti-stealth ability, improve The effect of detection accuracy and high linearity
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[0020] Such as Figure 1~5 As shown, a long-focal-length large-diameter laser guidance lens based on a four-quadrant detector, the optical system of the lens includes a meniscus positive lens A, a meniscus positive lens B, and a double Concave lens C, color filter D and biconvex lens E; The air interval between the meniscus positive lens A and the meniscus positive lens B is 1.15mm, and the air interval between the meniscus positive lens B and the biconcave lens C is 8.15mm mm, the air gap between biconcave lens C and color filter D is 8.25mm, the air gap between color filter D and biconvex lens E is 1.93mm, and the air gap between biconvex lens E and image plane (four-quadrant detector) The air gap is 18.6mm.
[0021] In this embodiment, the color filter D is made of HWB850 material, which has a strong absorption capacity for light energy in the visible light band, and is plated with a narrow-band high-transparency film layer to filter out stray light and avoid signal interf...
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