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Eyepiece optical system with large field of view and high image quality and head-mounted display device

A technology of optical system and field of view, which is applied in the field of optics, can solve problems such as increasing the difficulty of manufacturing optical components, increasing manufacturing cost and weight, and uneven image quality of full-frame, and achieves a high-presence visual experience, compact structure, and system Effect of Aberration Cancellation

Active Publication Date: 2019-07-23
SHENZHEN NED OPTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The eyepiece optical system can achieve the optical effect of super large field of view (>75 degrees), but the image quality of the peripheral field of view is lower than that of the central field of view, and the image quality of the full frame is not uniform enough. At the same time, it needs to use the refractive index Larger optical materials, in the existing known optical materials, materials with high refractive index lead to increased manufacturing cost and weight of products, and increase the difficulty of manufacturing corresponding optical elements

Method used

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  • Eyepiece optical system with large field of view and high image quality and head-mounted display device
  • Eyepiece optical system with large field of view and high image quality and head-mounted display device
  • Eyepiece optical system with large field of view and high image quality and head-mounted display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0139] as attached figure 1 As shown, the optical path structure schematic diagram of the eyepiece optical system of the first embodiment of the present invention, from the human eye observation side to the display device I side (from left to right), is successively the diaphragm E, the first lens group G1, the second lens Group G2 and display device I. Wherein, the first lens group G1 is composed of the first lens L1 and the second lens L2, and the second lens group G2 is composed of the third lens L3, the fourth lens L4 and the fifth lens L5. In the present invention, the diaphragm E can be the exit pupil of the eyepiece optical system, which is a virtual light exit aperture. When the pupil of the human eye is at the diaphragm position, the best imaging effect can be observed. In this embodiment, the first lens L1 is a positive lens, and the second lens L2 is a negative lens, forming a first lens group G1 with negative refractive power, wherein the first lens L1 is a biconv...

Embodiment 2

[0148] as attached Figure 4 As shown, the optical path structure schematic diagram of the eyepiece optical system of the second embodiment of the present invention, from the human eye observation side to the display device I side (from left to right), is successively the diaphragm E, the first lens group G1, the second lens Group G2 and display device I. Wherein, the first lens group G1 is composed of the first lens L1 and the second lens L2, and the second lens group G2 is composed of the third lens L3, the fourth lens L4 and the fifth lens L5. In this embodiment, the first lens L1 is a positive lens, and the second lens L2 is a negative lens, forming a first lens group G1 with negative refractive power, wherein the first lens L1 is a biconvex surface type, and the second lens L2 is a negative lens. The optical surface of lens L2 facing the human eye side is concave toward the human eye, and both the first lens L1 and the second lens L2 are even-order aspheric surfaces to f...

Embodiment 6

[0177] The eyepiece optical system design data of Example 6 is shown in Table 8 below:

[0178] Table 8

[0179]

[0180]

[0181] After testing, the radii of the scattered spots on the image plane (display device 1) of the rays of each field of view in Example 6 are small and uniform, the dislocation of the scattered spots formed by focusing light of different wavelengths in the same field of view is low, and the aberration of the optical system is well obtained. Correction, through the eyepiece optical system, a display image with overall uniformity and high optical performance can be observed.

[0182] In the further provided embodiment 9-27, each data of the eyepiece optical system meets the parameter requirements recorded in the summary of the invention, and the results are shown in the following table 5:

[0183] table 5

[0184] f 1 / f w

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Abstract

The invention relates to an eyepiece optical system with a large field angle and high image quality and a head-mounted display device. The eyepiece optical system with a large field angle and high image quality comprises a first lens group and a second lens group which are coaxially arranged in sequence along the direction of an optical axis from the human eye to an image source, and a certain focal length relation is satisfied. The effective focal length of the first lens group is a negative value, and the first lens group is composed of a first lens close to the human eye and a second lens away from the human eye. The effective focal length of the second lens group is a positive value, and the second lens group is composed of one or two lenses. The first lens is of a bi-convex shape, an optical surface, which is close to the human eye, of the second lens is concave towards the human eye direction, and the optical surface is an aspherical surface. An interval between the first lens and the second lens, a focal length relation of the lenses in the second lens group and material characteristics of each lens meet a certain relation. The second lens group further comprises a fourth lens and a fifth lens. The eyepiece optical system has the advantages of large aperture, large field angle, high resolution, low distortion, small size and the like, and is applicable to a head-mounted display and similar devices.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to an eyepiece optical system with a large field of view and high image quality suitable for a head-mounted display or similar devices and a head-mounted display device. Background technique [0002] With the continuous development of electronic devices towards ultra-miniaturization, as well as the development of new computer, microelectronics, optoelectronic devices and communication theories and technologies, wearable computing, a new model based on "people-oriented" and "integration of man and machine" has become possible. . Applications are emerging in military, industrial, medical, education, consumer and other fields. In a typical wearable computing system architecture, the head-mounted display device is a key component. The head-mounted display device guides the video image light emitted by the micro-image display (such as transmissive or reflective liquid crystal display,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B25/00G02B27/01
CPCG02B25/001G02B27/0172
Inventor 不公告发明人
Owner SHENZHEN NED OPTICS CO LTD
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