Conduction-type polarizing and beam-splitting synchronized lighting device

Abstract

The invention provides a conduction-type polarizing and beam-splitting synchronized lighting device. The lighting device comprises a light source, a light guide stick, a polarizing and beam-splitting prism, a first lens, a polarized light conversion unit and a second lens, wherein light emitted by the light source is focused on the light guide stick; the incident face of the polarizing and beam-splitting prism is bonded with the exit face of the light guide stick; the polarizing and beam-splitting prism divides incident light into a first linearly polarized light and a second linearly polarized light; the first lens projects the first linearly polarized light to one of a plurality of first projectors; the polarized light conversion unit converts the polarization direction of the second linearly polarized light to be the same as that of the first linearly polarized light; and the second lens projects the second linearly polarized light of which the polarization direction is converted to one of a plurality of second projectors. The lighting device adopts the polarizing and beam-splitting prism to divide natural light of the light source into two paths of linearly polarized light, converts natural light into linearly polarized light while achieving beam-splitting, improves the light efficiency and lowers interference of parasitic light in the projectors.

Description

technical field [0001] The present application relates to an illuminating device, in particular to a conductive polarization splitting synchronous illuminating device used in a projector. Background technique [0002] The projectors of the multi-projector true three-dimensional display are arranged in a circle. When the flat screen turns to face the projector, the projector projects the graphics of the corresponding cross-section. The screen rotates continuously, and the persistence of human vision will pass through the series of cross-sectional images of the rotating shaft. Synthesize a complete true three-dimensional image. To reconstruct an undistorted true three-dimensional image, the screen rotation should be completely synchronized with the projector lighting. [0003] In the Chinese patent application CN101038421A, a multi-projector layout scheme and multiple illumination light paths are disclosed, in which at least two projectors are used, placed around a rotating sc...

AI Technical Summary

Problems solved by technology

Wherein there are following problems, first, the illumination light that adopts is natural light, because the commonly used LCD and LCOS spatial light modulator require linearly polarized light illumination at present, so the light energy loss of synchronous illumination light path is bigger; One-to-one setting, the quantity is large, and the cost is high; in addition, the distance between the incident end of the beam transmission or the aperture and the rotating shaft is relatively long, generally between 300 and 800mm, and the projection distance of the illumination source is correspondingly relatively long. It is also correspondingly larger, thereby increasing the volume and moment of inertia of the rotating optical path

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