Large view field angle eyepiece optical system

Abstract

The invention provides a large view field angle eyepiece optical system for a head-mounted displayer, wherein the large view field angle eyepiece optical system comprises a first lens, a second lens, and a third lens which are successively and coaxially arranged along an optical axis direction from a human eye observing side to a displayer side; the first lens and the third lens are all positive lenses and the second lens is a negative lens; the surface, facing the human eye observing side, of the first lens is projected towards the human eye observing side and has a positive curvature radius; the surface, facing a diaphragm side, of the second lens is projected away from the human eye observing side and has a negative curvature radius; and at the same time, the materials, the focuses and the positions of the first lens, the second lens and the third lens should satisfy certain relationship, so that an image displayed on the displayer is imaged in human eyes after the image is amplified by an eyepiece. The eyepiece has the advantages of large hole diameter, large view field, high resolution ratio, low distortion and small size; and the eyepiece is suitable for head-mounted displayers and apparatuses similar to the head-mounted displayers.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to an eyepiece optical system suitable for head-mounted displays or similar devices. 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, organic electroluminescent device, DMD device) to the user's pupil through optical t...

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Problems solved by technology

[0004] Patent Document 1 (Chinese Patent Publication No. CN101609208A) provides an eyepiece system for head-mounted displays. The field of view of the eyepiece system is not large enough, not exceeding 55 degrees, and cannot meet the application of virtual reality; the lens size of the optical system Large size will lead to a large head-mounted near-eye display; insufficient consideration of mass production, insufficient space reserved for assembly at the edge of the lens, resulting in difficult assembly of the lens and difficult production

Patent Document 2 (Chinese Patent Publication No. CN101887166A) provides an eyepiece system for a head-mounted display. The field of view of the eyepiece system is small, less than 40 degrees, and it is difficult to achieve a large field of view and a sense of immersion.

Although the eyepiece of Patent Document 3 (Chinese Patent Publication No. CN104570323A) can achieve a large field of view (>70 degrees) optical performance, it cannot achieve key optical performances such as low distortion, large exit pupil, and image square telecentricity.

These properties play a vital role in the eyepiece observer's comfort, high presence experience and reducing the impact of dioptric adjustment on optical performance. And other performance at the same time, the difficulty of system design and optimization of aberration will be very difficult

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