an optical lens

A kind of optical lens and lens technology, applied in the field of optical lens, can solve the problem of low imaging quality of the optical system, and achieve the effect of wide field of vision, good visual effect and small weight

Active Publication Date: 2019-10-29
德伽智能光电(镇江)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a mutual restriction between the field of view, exit pupil diameter and imaging quality of the optical lens. The larger the field of view and exit pupil, the lower the imaging quality of the optical system.

Method used

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  • an optical lens
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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0029] figure 1 A schematic structural diagram of the optical lens according to the first embodiment of the present invention is shown, as figure 1 As shown, from the human eye observation side to the display device side (from left to right), there are diaphragm E (where human eyes observe), the first lens L1, the second lens L2, the third lens L3, and the fourth lens L4 , the first lens L1, the second lens L2 and the fourth lens L4 are positive lenses, the third lens L3 is a negative lens, wherein the positive lens of L1 can be a positive meniscus lens or a convex lens, the second lens and The third lens constitutes a positive-negative doublet for correcting the chromatic aberration of the system. The fourth lens L4 corrects field-dependent aberrations including distortion and curvature of field.

[0030] As a guarantee for obtaining a good imaging effect under a certain aperture, it is preferable to make each lens focal length of the present invention satisfy the following...

no. 2 example

[0053] Not limited to the form that only includes 4 lenses, the optical lens among the present invention can also add the 5th lens to further improve the imaging quality of the system, adopt as Figure 7 implemented in the manner shown.

[0054] Such as Figure 7 As shown, from the viewing side of the human eye to the display device (from left to right), there are diaphragm E, first lens L1, second lens L2, third lens L3, fourth lens L4 and fifth lens L5 in sequence. Wherein, the first lens L1 is a positive lens, and the positive lens can be a positive meniscus lens or a convex lens, and the second lens L2 and the third lens L3 form a positive-negative double cemented form, which is used to correct the chromatic aberration of the system, wherein, L2 It is a meniscus lens, which bends in the direction of L1. The fourth lens L4 and the fifth lens L5 are positive lenses for correcting field-of-view related aberrations, including distortion and field curvature, wherein L5 is a m...

no. 3 example

[0065] Figure 8 Still another embodiment of the optical lens in the present invention is shown. Such as Figure 8 As shown, from the viewing side of the human eye to the display device (from left to right), there are diaphragm E, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5 and the first lens Six lenses L6. Wherein, the first lens L1, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are positive lenses, the positive lens of the L1 can be a positive meniscus lens or a convex lens, and L5 is a meniscus lens, which is bent toward L6 direction, L6 is also a meniscus lens, which bends towards the direction of L5. Compared with the first and second embodiments, adding the meniscus lens L6 will improve the image quality beyond the edge of the field of view. The second lens L2 and the third lens L3 are positive-negative double cemented forms for correcting the chromatic aberration of the system. L4, L5, and L6 are used to correct field-de...

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PUM

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Abstract

The invention provides an optical lens comprising at least four lenses; a diaphragm, a first lens, a second lens, a third lens and a fourth lens are orderly arranged along an optical axis direction from a human eye observation side to a light source device side in the optical lens; the first lens is f1 in focal length, and the second lens is f2 in focal length; the second lens, the third lens andthe fourth lens are f24 in combined focal length; a total focal length of the optical lens is fw which satisfies the following relationship: (1) 0.66 <f1 / fw<3.3, (2) |f2 / fw|<4, (3) 0.5<f24 / fw<2.5. Viaadoption of the optical lens described in the invention, a view field can be enlarged, an exit pupil diameter can be increased, and visual effects can be improved.

Description

technical field [0001] The invention relates to an optical lens, in particular to an optical lens for transmission imaging. The optical lens can be used as an eyepiece and is widely used in the fields of helmet displays, miniature viewfinders and the like. Background technique [0002] Virtual reality and augmented reality technology has been a hot topic widely discussed in academia and industry in recent years. As its core hardware, the head-mounted display has been developed by global scientists, IT industry giants and many start-up companies, and has made considerable progress. develop. Since the HMD is mounted on the observer's head, it must be compact and lightweight to reduce the observer's load. The helmet-mounted display mainly consists of three parts: a display device, an optical lens and a helmet. To reduce weight, the optical system is the key, and the optical system includes the optical lens. The more compact the optical system, the lighter it is. However, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/06
CPCG02B13/0045G02B13/06
Inventor 侯起超王其为
Owner 德伽智能光电(镇江)有限公司
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