Novel wide-angle lens of endoscope
A technology of wide-angle lens and endoscope, which is applied in the direction of optical components, optics, instruments, etc., and can solve problems such as cost increase
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[0004] The specific embodiments of the present invention are further described below:
[0005] The objective lens used in the new wide-angle lens of the endoscope of the present invention includes a combination of a uniform plano-convex lens and a gradient index lens. The center of the lens adopts a gradient index lens, and the peripheral one or two circles adopt a uniform plano-convex lens. The refractive index of a uniform plano-convex lens is smaller than the minimum refractive index of a graded refractive index lens. And the peripheral part of the lens is made opaque to prevent stray light caused by reflection from the side of the lens.
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