Wide-field-of-view low-cost high definition athermalization prime lens
A fixed-focus lens and low-cost technology, applied in optical components, optics, instruments, etc., can solve the problems of fixed-focus lenses with insufficient field of view, difficult balance between performance and cost, and improvement in resolution, so as to achieve day and night sharing Focus, guaranteed performance, good imaging quality
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[0043] Such as figure 1 As shown, the large-field-of-view low-cost high-definition athermalized fixed-focus lens provided by this embodiment includes a first lens 1, a second lens 2, a third lens 3 and a fourth lens 4 arranged in sequence from the object side to the image side , the first lens 1 is a double-concave negative power plastic aspheric lens, the second lens 2 is a double-convex positive power glass spherical lens, the third lens 3 is a double-convex positive power plastic aspheric lens, and the fourth lens 4 It is a double-concave negative focal power plastic aspheric lens; the first lens 1 and the second lens 2 are closely matched through a spacer, the second lens 2 and the third lens 3 are tightly matched through a spacer, and the third lens 3 is closely matched with the fourth lens 4 Tightly matched by soma, soma is a shading film.
[0044] The surface shape, radius of curvature R, lens thickness, lens spacing, lens refractive index nd and K value of each lens m...
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