Wavelength conversion element, method for manufacturing same, light source device, and projector
A wavelength conversion element and light source device technology, applied in projection devices, optics, instruments, etc., can solve the problems of not considering the fluorescence Brewster's condition, the reduction of the utilization efficiency of P polarization components, and the inability to improve the utilization efficiency of fluorescence, etc.
Active Publication Date: 2021-09-14
SEIKO EPSON CORP
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Problems solved by technology
However, in Patent Document 1, the Brewster's condition when the fluorescence enters the intermediate layer and the dielectric multilayer film is not taken into account, so the utilization efficiency of the P-polarized component contained in the fluorescence decreases, and it may not be possible to improve the utilization efficiency of the fluorescence.
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no. 1 approach
[0038] Below, use Figure 1 to Figure 10 A first embodiment of the present invention will be described.
[0039] In order to make each component easier to see in each of the following drawings, it may be shown with a different scale for dimensions depending on the component.
[0040] An example of the projector of this embodiment will be described.
[0041] figure 1 It is a diagram showing a schematic configuration of the projector 1 according to the present embodiment.
[0042] like figure 1 As shown, the projector 1 of this embodiment is a projection type image display device that displays a color image on a screen SCR. Projector 1 has illumination device 2 , color separation optical system 3 , light modulation device 4R, light modulation device 4G, light modulation device 4B, synthesis optical system 5 , and projection optical device 6 . The configuration of the lighting device 2 will be described later.
[0043] The color separation optical system 3 has a first dichr...
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Abstract
Provided are a wavelength conversion element, a method for manufacturing the same, a light source device, and a projector, wherein the utilization efficiency of fluorescence is excellent. This wavelength conversion element is provided with: a substrate; a color separation layer disposed on the first surface of the substrate; an intermediate layer provided so as to face the substrate with the color separation layer interposed therebetween; and a wavelength conversion layer that is provided so as to face the color separation layer with the intermediate layer interposed therebetween and converts light of the first wavelength band into light of the second wavelength band. The color separation layer has two or more refractive index layers. The refractive index of the wavelength conversion layer is nm, the refractive index of the intermediate layer is nLm, the refractive index of the refractive index layer having the first refractive index among two or more refractive index layers is nL, and the refractive index of the refractive index layer having the second refractive index among two or more refractive index layers is nH. When nH is greater than nL, theta B >= theta C is satisfied with respect to theta B obtained by the following formula (1) and theta C obtained by the following formula (2) (shown in the description).
Description
technical field [0001] The present invention relates to a wavelength conversion element, a light source device, a projector, and a method for manufacturing the wavelength conversion element. Background technique [0002] As a light source device used in a projector, a light source device using fluorescence emitted from a phosphor when the phosphor is irradiated with excitation light emitted from a light emitting element has been proposed. Patent Document 1 below discloses a wavelength conversion element including a phosphor layer, an intermediate layer, a dielectric multilayer film, an adhesive layer, and a substrate. Patent Document 1 describes that the refractive index of the intermediate layer is, for example, 2.2 to 2.4, and that the refractive index of the phosphor layer is 1.83. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2016-99566 [0004] Patent Document 1 describes that by providing an intermediate layer having a refractive index larger than that of...
Claims
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IPC IPC(8): G03B21/20
CPCG03B21/204G03B21/2066G03B33/12
Inventor 白鸟幸也安松航御供田崇矢野邦彦
Owner SEIKO EPSON CORP