Optical engine of multiple-path green light source projector

A technology of optical engine and projector, which is applied in the field of projectors, can solve the problems of difficulty in realization, reduce the stability of green light output, increase the cost of crystal production, etc., and achieve the effect of reducing difficulty, improving stability and enhancing the intensity of green light

Inactive Publication Date: 2011-04-13
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to achieve a projection brightness of more than 15lm, it is necessary to use a green laser light source with an energy intensity higher than 50mw. This is still difficult to achieve for the current cemented crystal frequency doubling technology. On the one hand, it will reduce the stability of green light output. On the other hand, it will increase the production cost of the crystal

Method used

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  • Optical engine of multiple-path green light source projector
  • Optical engine of multiple-path green light source projector
  • Optical engine of multiple-path green light source projector

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0029] The green laser light source includes two green lasers, and the light emitted by one of the green lasers is first synthesized into basic three-color synthetic light through the dichroic mirror 1 and the light emitted by the red laser of the red laser source and the blue laser of the blue laser source;

[0030] The other green laser is located at an angle of 90° to the optical axis of the basic three-color synthetic light, and changes the direction of the optical path through the lens group, so that the emitted light path is combined with the previously synthesized basic three-color synthetic light to form a three-color path Synthesize light, thereby enhancing green light energy.

[0031]The three-color composite light is sent to the diffuser 2, passes through the diffuser 2, the beam shaper 3, and reaches the objective lens 4. The beam shaper 3 can be a fly-eye lens, a lamp tube, etc. The fly-eye lens includes a transparent substrate on which a plurality of spherical or...

specific Embodiment 2

[0035] Embodiment 2 is a variant of Embodiment 1. Figure 4 change in form relative to figure 2 There is one more reflector 10, and the reflector 10 can only reflect green light, or reflect all light.

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Abstract

The invention discloses an optical engine of a multiple-path green light source projector, and relates to a portable mini projector. The optical engine of the multiple-path green light source projector comprises an optical engine main body, and the optical engine main body comprises a green laser light source. The green laser light source comprises at least two green laser devices, and light beams emitted by the green laser devices become one beam of light by an optical lens. Light emitted by at least two green laser devices, a blue laser device and a red laser device becomes one path, so that the green light intensity of a system is increased, and the problems of color cast, dark brightness and the like caused by green energy shortage are avoided. Meanwhile, as the green laser devices with medium energy intensity can be adopted for synthesis to replace one green laser device with high energy intensity, the difficulty of a green light module can be reduced, the stability of an illuminating system is increased, and therefore the mini projection optical engine with high brightness is realized.

Description

technical field [0001] The invention relates to a projector, in particular to an optical engine for the projector. Background technique [0002] In order to commercialize portable pico projectors such as pico projectors that are smaller than the palm of your hand and projectors that can fit into a notebook, it is necessary to develop a projector that is small in size and low in power consumption. Miniaturization of projectors requires the use of light sources that are small in size but high in brightness. The most suitable light source for this type of low-power pico projector is a laser light source or a light-emitting diode light source. Among them, the laser light source is widely regarded as a high-efficiency light source with low power consumption and high brightness. [0003] A projector uses a light modulator to convert the light emitted from a light source into an image frame. At present, such light modulators usually use liquid crystal projection / reflection liqui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20G02B27/18G02B27/10G02B27/09G03B21/14
Inventor 张薇杨波程抒一窦晓鸣庄松林
Owner UNIV OF SHANGHAI FOR SCI & TECH
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