3D film and television system and 3D projection method

Abstract

The present invention relates to the field of optics, in particular to a 3D video system and a 3D video method, comprising: an L-shaped reflective polarizer for dividing incident projected light into transmitted light and two beams of reflected light, two mirrors, a second One liquid crystal wave plate group and two second liquid crystal wave plate groups; the transmission direction of the L-shaped reflective polarizer is provided with the first liquid crystal wave plate group; the reflection direction of each beam of reflected light of the L-shaped reflective polarizer is provided with a Reflecting the reflected light to the mirror of the second liquid crystal wave plate group; the reflection direction of the mirror is provided with the second liquid crystal wave plate group; the light path of the transmitted light reaching the first liquid crystal wave plate group and the reflected light reaching the second liquid crystal wave plate The length of the light path of the film group is equal, so that the image presented by each beam of reflected light on the screen coincides with the image presented by the transmitted light on the screen, increasing the light reaching the screen, so that the ratio of the light reaching the screen to the incident projection light Larger, so that the images presented on the screen are bright and clear, and the visual effect is better.

Description

technical field [0001] The present invention relates to the field of optics, in particular to a 3D video system and a 3D video method. Background technique [0002] With the development of 3D film and television, audiences and theater chains are constantly increasing their requirements for 3D film and television presentation effects, and need to use 3D film and television systems to meet viewing needs. [0003] related technologies, such as figure 1 As shown, the 3D video system includes a transmissive polarizer 1 and a first liquid crystal wave plate group 2 ; the first liquid crystal wave plate group is provided in the transmission direction of the transmissive polarizer 1 . During projection, the projection light of the projector is transmitted through the transmissive polarizer 1 and then reaches the first liquid crystal wave plate group 2, and then becomes circularly polarized light and reaches the screen after being transmitted through the first liquid crystal wave pl...

AI Technical Summary

Problems solved by technology

[0004] In such a 3D video system, since the projection light of the projector passes through the transmissive polarizer 1, reflection and transmission occur, only the transmitted light reaches the first liquid crystal wave plate group 2, and then reaches the screen after being transmitted through the first liquid crystal wave plate group 2 Compared with the projection light of the projector, the ratio of the light reaching the screen is small, resulting in dim and fuzzy images on the screen and poor visual effects.

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