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Method and device for generating low coherent light by wideband chaos modulation in laser display

A laser display and chaotic modulation technology, applied in projection devices, optics, optical components, etc., can solve the problems of not reaching the maximum output, low laser utilization rate, etc., and achieve the effect of fewer devices, improved laser utilization rate, and good effect.

Active Publication Date: 2019-05-21
TAIYUAN UNIV OF TECH
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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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  • Method and device for generating low coherent light by wideband chaos modulation in laser display

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with specific examples.

[0016] A device for producing low-coherence light by broadband chaotic modulation in a laser display, such as figure 1 As shown, it includes a broadband chaotic light source 1 and a laser drive circuit 5, the output of the broadband chaotic light source 1 is connected to the input of the high-speed photodetector 2, and the output of the high-speed photodetector 2 is connected to the input of the broadband amplifier 3 The output end of the broadband amplifier 3 is connected to an input end of the bias device 4, the output end of the laser drive circuit 5 is connected to the other input end of the bias device 4, and the output end of the bias device 4 The output end is connected to the input end of multiple lasers 6 through a line with a delay greater than 0.3ns or greater than 6cm to drive the lasers 6. A converging lens 7, a collimating lens 8 and a MEMS mirror 10 are arranged...

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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 application field of laser modulation of chaotic circuits, in particular to a method and device for generating low-coherent light through broadband chaotic modulation in laser display. Background technique [0002] With its advantages such as large color gamut, high color saturation, high electro-optical conversion efficiency, and long light source life, laser display technology has become the most promising new generation display technology after CRT, plasma, and LCD / LED display technologies. However, due to the extremely high temporal and spatial coherence of laser light, compound speckle exists in laser projection imaging, which seriously reduces the resolution and contrast of projected images. 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 p...

Claims

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Application Information

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IPC IPC(8): G03B21/20G02B27/48
Inventor 韩国华张青兰李月仙赵彤韩红贾志伟郭园园
Owner TAIYUAN UNIV OF TECH
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