Long-shot optical-train type precision approach course indicator light structure
A technology of indicator light and light group, which is applied in the aviation field, can solve the problems of high processing precision, difficulty in realizing the requirement of 3-point angle, and difficult adjustment of optical path, etc., achieve large defocus tolerance, solve high processing precision requirements, reduce The effect of precision requirements
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[0012] Example 1: Such as figure 1 As shown, the indicator light structure includes a light source device 1, a color filter 2, a concave lens 3, a convex lens 4, and a light box 5. The light box 5 is equipped with a light source device 1, a color filter 2, a concave lens 3, and a convex lens 4 in sequence. The lower edge of the color film 2, the center of the concave lens 3 and the center of the convex lens 4 are on the same horizontal line; the focal length of the convex lens 4 is 312mm, the focal length of the concave lens 3 is -217.2mm, the diameter of both lenses is 130mm, the concave lens 3 and the convex lens The distance d between 4 is 156 mm, so the focal length of the telephoto group composed of the concave lens 3 and the convex lens 4 is 1107.3 mm, and the distance between the color filter 2 and the concave lens 3 is about 553.7 mm.
[0013] The defocus tolerance of this system is 8.3mm, which is 13 times that of a single lens structure.
[0014] The light source device ...
Example Embodiment
[0015] Embodiment 2: The light source device 1 uses a red or white LED light source, and the color filter 2 is a diaphragm. The rest is the same as in embodiment 1. Two sets of the system (red light and white light) form a complete set of precision input Near course indicator.
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