Patent ID: 9513539
Filing Date: 2016-12-06
CPC Classification: F21K,F21Y,G02B,G03B

Claim Text:
1. A light source unit comprising: an excitation light source; a blue light source which emits light in a blue wavelength band; a luminescent plate comprising a luminescent material layer which emits luminescent light by receiving light emitted from the excitation light source; a microlens array which is disposed between the excitation light source and the luminescent plate and which converts light emitted from the excitation light source into a plurality of pencils of light so as to be shone onto the luminescent plate; and a collective lens which is disposed in proximity to the luminescent plate and which shines the plurality of pencils of light so that their center positions are superposed one on another on the luminescent material layer; and a dichroic mirror which makes an optical axis of the blue light source and an optical axis of the luminescent light coincide with each other on the same optical axis, wherein a surface of the luminescent plate is formed into a reflecting plane and the luminescent material layer having a predetermined shape is laid on the luminescent plate, and wherein the microlens array is made up of a plurality of micro convex lenses which each have a similar shape to the shape of the luminescent material layer and which are arranged into a matrix.