Hybrid diffractive-refractive wide-angle lens
A wide-angle lens and refraction-diffraction hybrid technology, which is applied in the field of optical lenses, can solve the problems of complex structure, many lenses, and large size, and achieve the effects of improving imaging quality, correcting chromatic aberration, and large field of view
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[0024] Such as figure 1 As shown, a refraction-diffraction hybrid wide-angle lens, from the object side to the image side is the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the diaphragm 5, the fifth lens 6, and the sixth lens 7. The seventh lens 8 and the image plane 9 . The first lens 1 is a negative meniscus lens with even-order aspheric surfaces on both sides, the second lens 2 is a biconcave lens with even-order aspheric surfaces on both sides, and the front surface of the third lens 3 is spherical , the rear surface is a binary diffractive surface, the fourth lens 4 is a biconvex spherical lens, the fifth lens 6 is a biconcave spherical lens, the sixth lens 7 is a biconvex spherical lens, and the seventh lens 8 is a negative meniscus spherical lens.
[0025] In the present invention, both the first lens 1 and the second lens 2 are aspheric lenses with even-order aspheric surfaces on both sides, and the curved surface of the lens is aspherical,...
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