Video projector using coherent light source

Details Video projector using coherent light source Video projector using coherent light source

2011-01-11

2011-01-11

Epps, Georgia Y (Department: 2878)

Optics: image projectors

Composite projected image

Multicolor picture

Reexamination Certificate

active

07866822

ABSTRACT:
In the video projector of the present invention, a fiber part of a fiber laser is disposed so as to draw a circulating orbit of more than one circulation along the inner wall of the projector housing. Further, an FBG which is part of the fiber laser is fixed so that its shape is not changed. Furthermore, a pump LD part of the fiber laser is disposed apart from the SHG element. As a result, the video projector can be miniaturized, and the portability and installment of the video projector are facilitated. Further, the output stabilization of the fiber laser can be realized by preventing a shape change of the FBG. Furthermore, by disposing the SHG element apart from the pump LD part which forms a heat source, the temperature change of the SHG element is suppressed and the wavelength conversion efficiency by the SHG element is enhanced.

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