Projection system and projector

Abstract

The embodiment of the invention discloses a projection system and a projector. The projection system comprises a light emitting module, a light uniformizing module, a light modulation module, a digital micromirror array and a projection imaging module. The light emitting module is used for emitting light beams required by the projection system. The light uniformizing module comprises a light uniformizing sheet which is used for carrying out light uniformizing treatment on the light-emitting light beam to form a light-uniformized light beam. The light modulation module comprises a first modulation unit, and the first modulation unit is used for adjusting the uniform light beam to be incident to the digital micromirror array. The digital micromirror array is used for reflecting the uniform light beam to form a reflected light beam, and the reflected light beam carries a coding pattern. The light modulation module further comprises a second modulation unit, and the second modulation unit is used for reflecting at least part of the reflected light beam to the projection imaging module. The projection imaging module is used for projecting the reflected light beam to a to-be-projected position. The light uniformizing sheet is used for uniformizing light beams, so that the size of the projection system is effectively reduced and the manufacturing cost is reduced on the premise of ensuring the projection effect.

Description

technical field [0001] Embodiments of the present invention relate to the field of projection technology, and in particular, to a projection system and a projector. Background technique [0002] Structured light three-dimensional imaging technology is widely used in the field of precision measurement. Its imaging principle is to project coded stripes onto the surface of the measured object, and the acquisition camera obtains the deformed fringe information modulated by the shape of the object. The modulated fringe contains the measured object's Height information, so as to further obtain the three-dimensional shape of the measured object. [0003] The common structure of structured light 3D imaging technology in the prior art is a 3D camera composed of dual acquisition cameras and a projector. The volume of the industrial camera and FA lens is very small. The overall volume of the 3D camera is due to the reflective bowl and compound eye used in the projector. Or various opt...

AI Technical Summary

Problems solved by technology

[0003] The common structure of structured light 3D imaging technology in the prior art is a 3D camera composed of dual acquisition cameras and a projector. The volume of the industrial camera and FA lens is very small. The overall volume of the 3D camera is due to the use of reflective bowls and compound eyes in the projector. Or a variety of optical components such as light uniform rods have been shaped into beams, making the overall structure complex, large in size, and high in manufacturing costs, which is not conducive to the miniaturization design, batch, and large-scale production of 3D cameras.

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