Short distance optical magnification module, glasses, helmet and vr system

Abstract

The embodiment of the invention discloses a short distance optical amplification module, spectacles, a helmet and a VR system. The amplification module comprises a reflective polarizing film, a first phase retarder, a second lens and a second phase retarder which are sequentially arranged, and any position on the two sides of any optical element among the reflective polarizing film, the first phase retarder, the second lens and the second phase retarder is further provided with a first lens; the optical surface, close to the second phase retarder, in the second lens is a semi-transmission semi-reflection optical surface; a first focal distance f2 of the second lens meets the condition that f2 is larger than or equal to 1.2 F and smaller than or equal to 2 F, wherein F is the system focal distance of the optical amplification module. Parameter refinement is conducted on the first focal distance f2 which affects the optical amplification effect so that the module can maintain small overall thickness while obtaining a high optical amplification effect, the VR equipment can achieve a better field angle, a large eye movement range and a high-quality imaging effect, and a better experience feeling is brought to a user.

Description

technical field [0001] The invention relates to an optical instrument, in particular to a short-distance optical amplification module, glasses, a helmet and a VR system. Background technique [0002] In the existing optical amplification module structure, such as figure 1 As shown, from the image side to the object side, it includes a reflective polarizer 01, a first phase retarder 02, a lens unit 03, and a second phase retarder 04. In the lens unit 03, close to the second phase retarder The optical surface of sheet 04 is a transflective optical surface. During use, the optical image on the object side is transmitted and enlarged through the lens unit 03, then reflected on the reflective polarizer 01, and then amplified twice through the lens unit 03, and finally passed through the reflective polarizer Piece 01 enters the human eye. Further, there is also a Other lens units that do not affect the phase delay of light rays. The lens unit 03 and other lens units form a le...

AI Technical Summary

Problems solved by technology

[0004] An embodiment of the present invention provides a short-distance optical zoom module, glasses, a helmet, and a VR system to solve the problem of low user experience in smart VR wearable devices in the prior art

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