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Off-axis dual-reflection head-wearing glasses display optical system

An optical system and double-reflection technology, applied in optics, optical components, instruments, etc., can solve the problems of high processing cost, difficult assembly and adjustment, and difficult aberration correction, and achieve light weight and facilitate the correction of system aberrations , the effect of large field of view

Inactive Publication Date: 2018-09-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0005] The purpose of the present invention is to provide an off-axis double-reflection head-mounted display optical system to solve the problems of the existing head-mounted display optical system with small field of view, small exit pupil diameter, complex structure, high processing cost, difficult installation and adjustment, and image problems. Difficult problem of difference correction

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Embodiment Construction

[0020] The coordinate system of the present invention is defined as: the center of the exit pupil (i.e. the pupil of the human eye) position is set as the system coordinate origin, the YOZ plane is the paper surface, the Y axis is horizontally left, the Z axis is vertically upward, and the X axis is vertical to the inside of the paper ; The optical system is symmetrical about the YOZ plane;

[0021] The system structure of the embodiment of the optical system of the off-axis double-reflection head-mounted glasses display of the present invention is as follows figure 1 As shown, it consists of a micro display screen (19), a first free-form surface reflector (A), a second free-form surface reflector (B), a light collimating lens group and an aberration correction lens group. to combine figure 2 Explain the numbers of each optical surface, the plane where the exit pupil (i.e. the pupil of the human eye) is located is plane 1, and the direction from the observer to the image sou...

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Abstract

The present invention relates to an off-axis dual-reflection head-wearing glasses display optical system, belongs to the fields of optical systems and device design, and is suitable for the fields ofvirtual reality and augmented reality. The system comprises a micro display, two pieces of free-form surface reflectors, a light collimating lens and an aberration correction lens set. The micro display is an OLED about 1 inch, the two pieces of the free-form surface reflectors meet a free-form surface shape equation, and lenses of the light collimating lens and the aberration correction lens setare coaxial, and the surface shapes of the light collimating lens and the aberration correction lens set are in rotation symmetrical modes. The optical system related in the invention is designed according to a reverse optical path. The system is large in view field angle, large in exit pupil diameter, simple in structure, easy to process, small in size and light in weight, the surface shape parameters, the thicknesses, the eccentricity and the inclined angles of the two pieces of the free-form surface reflectors can be taken as optimization variables to more facilitate correction of system aberration.

Description

technical field [0001] The invention relates to an off-axis double-reflection head-mounted glasses display optical system, belongs to the field of optical system and device design, and is suitable for the fields of virtual reality and augmented reality. Background technique [0002] Currently, virtual reality (Virtual Reality, referred to as VR) and augmented reality (Augmented Reality, referred to as AR) are in a stage of rapid development, and the two technologies have made great progress in the helmet image display device. Since the head-mounted display device needs to be worn on the observer's head, compact structure, small size and light weight are important development goals. Moreover, the size of the field of view of the head-wearing display device determines the immersion and observation range of the observer, so a large field of view is another important development goal of the head-wearing display device. [0003] The development of head-wearing display devices ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/01
CPCG02B27/0172G02B2027/0123G02B2027/013
Inventor 冯云鹏黄颂超程灏波
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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