F6mm all-pass day and night full-color high-definition fixed-focus lens
A fixed-focus lens and light-passing technology, applied in optics, optical components, instruments, etc., can solve the problems of low lens performance index and unclear imaging effect, and achieve the effect of high resolution, compact structure and sufficient light input.
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[0014] Such as Figure 1~2 As shown, a f6mm all-through light day and night full-color high-definition fixed-focus lens, the optical system of the lens is sequentially provided with a front lens group A with a negative focal power, a diaphragm and a focal power along the incident direction of the light from the front to the rear. It is a positive rear lens group B to achieve the purpose of front and rear compensation; the front lens group A includes biconcave lens A-1, negative crescent lens A-2 and biconvex lens A-3 arranged in sequence from front to back; The rear lens group B includes a double-convex lens B-1, a double-concave lens B-2, a double-convex lens B-3, and a glued group consisting of a double-convex lens B-4 and a negative crescent lens B-5, which are arranged in sequence from front to back. A filter is also arranged behind the glued group.
[0015] In this embodiment, the air interval between the biconcave lens A-1 and the negative crescent lens A-2 is 1.56mm, a...
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