Diopter-adjustable optical system for helmet display

A helmet-mounted display and optical system technology, applied in the field of optics, can solve the problems that the lens magnifying device cannot be directly applied to the optical transmission-type helmet-mounted display, and can not see the external scenery, etc., and achieves simple and convenient focus adjustment, satisfactory imaging quality, and a wide range of applications Effect

Active Publication Date: 2014-08-20
BEIJING NEDPLUSAR DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the lens magnifying device and the micro-display screen are placed in front of the human eye, the human eye can only observe the magnified image of the micro-display screen, and cannot see the external scenery. Therefore, the lens magnifying device cannot be directly applied to an optical transmission helmet-mounted display. middle

Method used

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  • Diopter-adjustable optical system for helmet display
  • Diopter-adjustable optical system for helmet display
  • Diopter-adjustable optical system for helmet display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as image 3 As shown, from the human eye observation side to the microdisplay device side, there are diaphragm 101, spectacle lens 102, biconvex lens 103, plane mirror 104, negative meniscus lens 105, positive doublet lens 106, positive doublet lens 107 , a positive meniscus lens 108 , and a microdisplay device 109 . Taking the surface of the diaphragm as number 1, and so on, the surface number of the microdisplay is 16. The design data of each element of the optical system in this embodiment is shown in Table 1.

[0038] Table 1

[0039]

[0040] The system parameters of the optical system in the embodiment are as follows: exit pupil diameter=9mm, horizontal field of view=34°, vertical field of view=23.3°, exit pupil distance=47.23mm, diopter adjustment range-5.5 to 0.

[0041] The surface with "*" on the upper corner of the surface number in Table 1 determines the position of the surface using the global coordinate system OXYZ, the Z axis is horizontal to th...

Embodiment 2

[0055] Figure 5 Shows the diopter-adjustable optical system for helmet display of Embodiment 2 of the present invention, from the human eye observation side to the micro-display side, followed by an aperture 201, a spectacle-like reflector 202, a positive meniscus lens 203, and a plane Mirror 204, negative meniscus lens 205, positive doublet lens 206, positive doublet lens 207, positive meniscus lens 208 and microdisplay 209, wherein there is a real image between the spectacle-like lens 202 and the positive meniscus lens 203, doublet The lens 206 is a negative-positive doublet lens, and the doublet lens 207 is a positive-negative doublet lens. The combination of the doublet lens 206 and the doublet lens 207 can reduce vertical aberration and system chromatic aberration. As a function, the positive meniscus lens 208 corrects aberrations related to the field of view, including distortion and field curvature, and well controls the telecentricity of the image space of the system....

Embodiment 3

[0069] Figure 7 Shows the adjustable diopter optical system for the helmet display of Embodiment 3 of the present invention, from the human eye observation side to the micro-display side, followed by an aperture 301, a spectacle-shaped mirror 302, a positive biconvex lens 303, and a plane reflection mirror 304, negative meniscus lens 305, positive doublet lens 306, positive doublet lens 307, positive meniscus lens 308, and microdisplay 309, wherein there is a real image between the spectacle-like lens 302 and the positive doublet lens 303, and the doublet lens 306 It is a negative-positive doublet lens, and the positive doublet lens 307 is a positive-negative doublet lens. The combination of the positive doublet lens 306 and the positive doublet lens 307 can reduce vertical aberration and system chromatic aberration The positive meniscus lens 308 corrects aberrations related to the field of view, including distortion and field curvature, and well controls the telecentricity o...

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Abstract

The invention provides a diopter-adjustable optical system for a helmet display. The diopter-adjustable optical system comprises a glasses-shaped lens and a relay lens set. The glasses-shaped lens is arranged before the human eyes, and the relay lens set is arranged between a micro-display and the inner surface of the glasses-shaped lens. Image light rays sent by the micro-display of the helmet display are transmitted to the inner surface of the glasses-shaped lens by the relay lens set, and then the glasses-shaped lens is used for reflecting the light rays to the human eyes. The relay lens set is used for imaging an image of the micro-display to the position between the glasses-shaped lens and the relay lens set, and the glasses-shaped lens is used for magnifying the real image into a virtual image before the human eyes. The distance between the virtual image and the human eyes is changed according to the vision level of a user through zooming of the relay lens set, and therefore people with the normal eyes, the myopic eyes and the hypermetropic eyes can clearly see the image of the micro-display. Imaging and zooming of the relay lens set can be achieved by adopting six lenses, the complex degree of the relay lens set is reduced, and the structure is simplified.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to an optical system for a helmet-mounted display with adjustable diopter. Background technique [0002] Head Mounted Displays (HMDs) are popular products in the display field in recent years, and HMDs for virtual reality and augmented reality have achieved rapid development. The existing helmet-mounted displays, whether they are head-mounted or glasses-type, are usually designed and manufactured for normal human eyes, and the distance between the image displayed on the micro-display and the human eyes is fixed, that is, there is no diopter adjustment function. Such as figure 1 The shown patent CN101726856B discloses an airborne goggle-type helmet display optical system, including an image source, a relay lens assembly, a prism assembly and a concave mirror, and the relay lens assembly transmits the image light generated by the image source to the prism assembly , the prism compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/01G02B27/64G02B7/10G02B25/00
Inventor 程德文许晨王涌天刘越
Owner BEIJING NEDPLUSAR DISPLAY TECH CO LTD
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