3D (three dimensional) film and television system and 3D projection method

Abstract

The invention relates to the field of optics, in particular to a 3D film and television system and a 3D film and television method. The 3D film and television system comprises an L-shaped reflection type polaroid, two reflection mirrors, a first liquid crystal wave plate set and two second liquid crystal wave plate sets, wherein the L-shaped reflection type polaroid is used for splitting incident projection light into transmission light and two beams of reflection light; the first liquid crystal wave plate set is arranged in a transmission direction of the L-shaped reflection type polaroid; a reflection mirror which is used for reflecting the reflection light to a second liquid crystal wave plate set is arranged in a reflection direction of each beam of reflection light of the L-shaped reflection type polaroid; the second liquid crystal wave plate sets are arranged in reflection directions of the reflection mirrors; and a light ray path that the transmission light reaches the first liquid crystal wave plate set is equal to light ray paths that the reflection light reaches the second liquid crystal wave plate sets, so that an image which is presented on a screen by each beam of reflection light is overlapped with an image which is presented on the screen by the transmission light, light reaching the screen is increased, the specific value of the light reaching the screen to incident projection light is larger, 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 s

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