Patent ID: 9325955
Filing Date: 2016-04-26
CPC Classification: G03B,H04N

Claim Text:
1. A light source apparatus, comprising: a rotary driver; an optical plate which is rotated by the rotary driver and which includes a translucent segment and a fluorescent substance layer; an excitation light source unit which emits excitation light; a convergence optical system which converges the excitation light emitted from the excitation light source unit to the translucent segment and to the fluorescent substance layer; a transfer optical system which transfers a spot of the excitation light converged to the translucent segment by the convergence optical system to a transfer plane different from an optical plate plane of the optical plate; a first casting optical system which projects a light source image of fluorescence onto a common casting plane different from both the optical plate plane and the transfer plane, wherein the convergence optical system converges the excitation light to the fluorescent substance layer to form the light source image of the fluorescence on the fluorescent substance layer; and a second casting optical system which projects the spot of the excitation light transferred on the transfer plane by the transfer optical system onto the common casting plane, wherein an optical path length of the first casting optical system from the optical plate plane to the common casting plane is equal to an optical path length of the second casting optical system from the transfer plane to the common casting plane, wherein the transfer optical system includes an ellipsoidal concave mirror, wherein a first focal point of the ellipsoidal concave mirror is positioned at the spot of the excitation light converged to the optical plate plane by the convergence optical system, wherein a second focal point of the ellipsoidal concave mirror is on the transfer plane, and wherein the transfer plane is perpendicular to the optical plate plane and to the common casting plane.