Low distortion high resolution day and night lens
A high-resolution, lens technology, applied in instruments, installations, optics, etc., can solve problems such as large distortion of fixed-focus lenses and inability to achieve clear imaging, and achieve the effects of small edge dispersion, compact structure, and high resolution
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[0017] A low-distortion high-resolution day-night lens, the optical path of the lens is an anti-telephoto optical structure; the optical system of the lens is provided with a front group A and a rear group B in sequence along the incident direction of light from front to back. Group A includes a convex-concave lens A-1, a convex-concave lens A-2 and a convex-concave lens A-3, which are arranged in sequence from front to back, and a double-concave lens A-4. B includes plano-convex lens B-1.
[0018] In this embodiment, the air gap between the front group A and the rear group B is 14.21mm.
[0019] In this embodiment, the air gap between the convex-concave lens A-1 and the cemented group in the front group A is 14.21 mm, and the air gap between the cemented group and the double-concave lens A-4 is 1.03 mm.
[0020] All the lenses of this lens are made of high refractive index glass, which bears a large focal power, so that the wide-angle oblique light rays quickly "converge" af...
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