Method and device for generating low-coherence light by broadband chaotic modulation in laser display

Abstract

The invention discloses a method and device for generating low coherent light by wideband chaos modulation in laser display, and relates to the field of laser modulation application of a chaos circuit. The method is specially characterized in that a wideband chaos light source gives out a light source signal, the light source signal is input to a high-speed photoelectric detector, a wideband chaoselectrical signal is generated and then is amplified by a wideband amplifier, the wideband chaos electrical signal is input to a bias device, a driving voltage of a laser driving circuit is also input the bias device and is mixed with the chaos signal amplified by wideband, power is supplied to a plurality of lasers for laser display so as to drive the lasers to work, meanwhile, the chaos modulation signal is also output, each signal is input in parallel to the modulation laser and passes through a circuit with delay larger than 0.3ns or 6cm, each laser outputs chaos laser, no coherence is generated when an output signal reaches a screen end, namely low coherent light output is obtained, the light is converged by a convergent lens, is collimated by a collimating lens and is injected to anMEMS lens in parallel, and the imaging of a laser display system on a screen is achieved by adjustment of a corresponding scanning circuit.

Description

Technical field[0001]The invention relates to the laser modulation application field of chaotic circuits, and specifically relates to a method and device for generating low-coherence light by broadband chaotic modulation in laser display.Background technique[0002]Laser display technology, with its advantages of large color gamut, high color saturation, high electro-optical conversion efficiency, and long light source life, has become the most promising new generation of display technology after CRT, plasma, and LCD / LED display technologies. However, due to the extremely high temporal and spatial coherence of the laser, compound speckles exist during laser projection imaging, resulting in a serious decline in the resolution and contrast of the projected image. This problem has always been a key issue hindering the development of laser display technology.[0003]In order to solve this problem, most researchers add different devices to reduce the coherence of the laser in the optical pat...

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Problems solved by technology

[0008] In order to solve the problem in the prior art that the utilization rate of the laser is not high and the output cannot reach the maximum due to the existence of speckles, the present invention provides a method and device for generating low-coherence light by broadband chaotic modulation in laser display

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