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
CN103995355AActive Publication Date: 2014-08-20BEIJING NEDPLUSAR DISPLAY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING NEDPLUSAR DISPLAY TECH CO LTD
Publication Date
2014-08-20

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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.
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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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