Eyepiece

A technology of eyepieces and lenses, which is applied in the field of eyepieces, can solve the problems of large exit pupil diameter and short-focus compactness, etc., and achieve the effect of being convenient for human eyes to see, light in weight and compact in structure

Active Publication Date: 2009-12-23
BEIJING NEDPLUSAR DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the field of view, exit pupil diameter, and focal length of the optical system are mutually restrictive, and it is not easy to achieve a large field of view, a large exit pupil diameter, and a short focus (that is, the compactness of the system) at the same time.

Method used

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Examples

Experimental program
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Embodiment Construction

[0042] figure 1 shows an eyepiece according to a first embodiment of the invention, as figure 1 As shown, from the human eye observation side to the display device I side (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 sixth lens L6, the first lens L1 and the second lens L2 are positive lenses, the third lens L3 and the fourth lens L4 constitute a positive-negative doublet lens to correct the chromatic aberration of the system, and the fifth lens L5 is a positive lens , the sixth lens L6 is a negative lens, L5, L6 correct the aberrations related to the field of view, including distortion and field curvature, and well control the telecentricity of the image space of the system. The surface number of the diaphragm is 1, and so on, and the surface number of the display device is 13. The eyepiece design data of the first embodiment are shown in Table 1 below.

[0043] Table 1

[0044]

[0045] ...

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Abstract

The invention relates to an eyepiece, in particular to an eyepiece used in a head-mounted display, belonging to the field of optical technique. The eyepiece is formed by six pieces of lenses, and a lens screen, the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are sequentially arranged from the observing side of human eyes and the display device side along the direction of an optic axis in a coaxial way; the exit pupil diameter of the eyepiece is larger than that of the common eyepiece, the eye relief is long, the angle of view field is large, and the focal distance and F/# are small; furthermore, illuminance of image plane is evener, so that the eyepiece especially meets the requirements of the head-mounted display.

Description

technical field [0001] The invention relates to an eyepiece, in particular to an eyepiece used in a helmet-mounted display, and belongs to the field of optical technology. Background technique [0002] Head Mounted Display (HMD) is a popular product in the field of display in recent years, and the HMD image display device for virtual reality and augmented display has made great progress. Since the head-mounted display device is installed on the observer's head, it must be compact and light in weight to reduce the load on the observer. The helmet-mounted display is mainly composed of three parts: display components, optical lenses and the helmet. To reduce weight, the optical system is the key. However, there is a certain contradiction between the compactness of the optical system and the requirements for the imaging quality of the optical system of the helmet-mounted display. For helmet-mounted displays, the optical system is required to achieve a relatively large field of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B25/00G02B27/01
Inventor 程德文王涌天
Owner BEIJING NEDPLUSAR DISPLAY TECH CO LTD
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