Light source equipment

Abstract

The invention provides light source equipment. The equipment is characterized by comprising a light source, a reflection element, a polarization beam splitter and a wavelength conversion device, a transmission area of the reflection element allows light of a first wave band emitted by the light source to pass through or enter the polarization beam splitter after passing through, and a reflection area of the reflection element can reflect the light of the first wave band from the polarization beam splitter, so the light is emitted back to polarizing beam splitter, the light can be reused, and the light emitting efficiency of the light source equipment is improved. The light source equipment provided by the invention has the characteristics of high brightness, small optical expansion amount,high color rendering index, long service life and the like, and can be applied to systems requiring high illumination intensity and small optical expansion amount, such as an entertainment illumination system, a projection system, an automobile illumination system, a medical illumination system, a searchlighting illumination system, a field operation illumination system, a navigation illuminationsystem, a portable illumination system and the like.

Description

technical field [0001] The invention belongs to the field of lighting, in particular to the field of solid-state light source lighting. The light source device provided by the present invention can be applied to systems that require high light intensity and small etendue, such as entertainment lighting systems, projection systems, automotive lighting systems, medical lighting systems, search lighting systems, field operation lighting systems, Nautical lighting systems, portable lighting systems, etc. Background technique [0002] As an ideal point light source, laser has the advantages of small etendue, long life and no mercury. Using it as a light source to excite the fluorescent body can produce colored light or white light, and at the same time cooperate with the use of optical elements to obtain an ideal light-emitting device with a small etendue. [0003] figure 1 It is a structural schematic diagram of an existing polarization-splitting light source device. like f...

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Problems solved by technology

[0004] figure 1 The scheme shown is based on the assumption that the blue light of circularly polarized light is reflected by the reflective layer 50a of the wavelength conversion device 50, and its polarization state remains unchanged (that is, it is still circularly polarized light). However, according to common sense of optics, we know that the polarization After light is diffusely reflected, it is difficult for the reflected light to fully retain the polarization state of the original incident light. Usually, the reflected light may partially retain the polarization state of the original incident light or completely become unpolarized light.

while in figure 1 In the solution shown, the reflection of the circularly polarized blue light by the wavelength conversion device 50 is diffuse reflection, because only in this way can a uniform white light output be obtained, but in this way there will be a considerable part of the reflected light by the wavelength conversion device 50 Blue light cannot maintain the polarization state of circularly polarized light, and even all the blue light reflected by the wavelength conversion device 50 will become non-polarized light, which will cause at least part of the blue light to fail to become The blue light of P polarized light cannot be completely emitted from the light source device, which will lead to low luminous efficiency of the entire light source device

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