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
Pending Publication Date: 2018-09-28
CHINA JILIANG UNIV
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Abstract
The invention relates to a hybrid diffractive-refractive wide-angle lens. The hybrid diffractive-refractive wide-angle lens comprises a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens sequentially from an object space to an image space, the first lens is a negative meniscus lens with two even-order aspheric sides, the second lens is a biconcave lens with two even-order aspheric sides, the third lens is provided with a spherical front surface and a binary diffractive rear surface, the fourth lens is a biconvex spherical lens, the fifth lens is a biconcave spherical lens, the sixth lens is a biconvex spherical lens, and the seventh lens is a negative meniscus spherical lens. The hybrid diffractive-refractive wide-angle lens adopting a hybrid manner of diffraction and refraction is small in size and light, total optical length is smaller than 18mm, achieves imaging effects of large visual field, low distortion and low chromatic aberration and obtains high imaging quality.
Application Domain
Diffraction gratings
Technology Topic
PhysicsWide-angle lens +8
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