Achromatic lens, optical module and vr wearing equipment
An achromatic lens and optical module technology, applied in optics, lenses, optical components, etc., can solve the problems of limited chromatic aberration correction capability of Fresnel lens, affecting user experience, and inability to meet achromatic aberration, and improve light output display. effect, improve the viewing experience, display good effect
Active Publication Date: 2021-07-09
ZHEJIANG CRYSTAL OPTECH
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Problems solved by technology
This kind of single lens is usually a convex lens with an aspheric surface, but this kind of aspheric lens that works completely based on the principle of refraction (such as the authorized patent CN105572894B) has obvious chromatic aberration in each field of view of the system due to the refractive index dispersion of different colors of light with wavelength. In particular, the chromatic aberration of the peripheral field of view is serious, and the displayed color uniformity is poor, which seriously affects the user experience
[0003] The Fresnel lens has the function of correcting chromatic aberration, but the chromatic aberration correction ability of the Fresnel lens is limited, and it cannot meet the needs of achromatism
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[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.
[0034] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...
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Abstract
The invention provides an achromatic lens, an optical module and a VR wearable device, which belong to the technical field of optical display and imaging, and can effectively reduce the chromatic aberration defect of light output and improve the display effect. The achromatic lens includes a first lens, and the first lens includes a refractive surface perpendicular to the main optical axis and oppositely arranged and a binary optical surface, and the binary optical surface includes an annulus structure surface and a binary surface formed on the annulus structure surface. Multiple ring steps, the depth T of the ring steps satisfies: T=h / 2 n ; where, h is the layer thickness of the ring, n is the order of the ring.
Description
technical field [0001] The present invention relates to the technical field of optical display and imaging, in particular to an achromatic lens, an optical module and a VR wearing device. Background technique [0002] In the prior art, in order to make the optical magnification module as thin and miniaturized as possible on the premise of realizing the large viewing angle display of virtual reality, the imaging lens group is generally set in the form of a single lens. This kind of single lens is usually a convex lens with an aspheric surface, but this kind of aspheric lens that works completely based on the principle of refraction (such as the authorized patent CN105572894B) has obvious chromatic aberration in each field of view of the system due to the refractive index dispersion of different colors of light with wavelength. In particular, the chromatic aberration in the peripheral field of view is serious, and the displayed color uniformity is poor, which seriously affects...
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IPC IPC(8): G02B3/08G02B27/01
CPCG02B3/08G02B27/0172
Inventor 刘明欢麦英强冯东洋刘风雷
Owner ZHEJIANG CRYSTAL OPTECH