Polarization folding light path structure, optical imaging system and virtual reality equipment

Abstract

The invention discloses a polarization folding light path structure which comprises a first 1 / 4 wave plate, a polaroid, a first polarization reflector plate, a second 1 / 4 wave plate and a semi-transparent and semi-reflective layer which are arranged in sequence. According to the polarization folding light path structure, the polarization reflection sheet is additionally arranged between the polaroid and the second 1 / 4 wave plate, light energy loss caused by reflection of the semi-transparent and semi-reflection layer can be reduced, and therefore the lighting effect of a polarization folding light path is improved. Meanwhile, due to the fact that the 1 / 4 wave plate and the polaroid are sequentially attached to the front portion of the OLED screen, stray light transmitted and reflected by the semi-transmitting and semi-reflecting layer can be absorbed to the maximum extent, the occurrence of undesirable phenomena such as ghost images can be reduced, and then the imaging quality can be improved. The invention also discloses an optical imaging system and virtual reality equipment.

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