Patent ID: 8287138
Filing Date: 2012-10-16
Classification: F21V,G02B,G03B

Abstract:
1. A light source device comprising: first and second lamps; first and second concave mirrors provided corresponding respectively to the first and second lamps; third and fourth concave mirrors provided corresponding respectively to the first and second lamps; and a plane mirror disposed between the first and second lamps, wherein the third concave mirror is provided on the same side as the first concave mirror with respect to a light source center of the first lamp and at a position closer to the light source center of the first lamp than the first concave mirror, and reflects a part of light emitted from the first lamp toward the first concave mirror, the fourth concave mirror is provided on an opening side of the second concave mirror with respect to a light source center of the second lamp and at a position closer to the light source center of the second lamp than the second concave mirror, and reflects a part of light emitted from the second lamp toward the second concave mirror, the first concave mirror condenses light emitted from the first lamp and light reflected at the third concave mirror, the second concave mirror condenses light emitted from the second lamp and light reflected at the fourth concave mirror, the first concave mirror and the second concave mirror are arranged such that optical axes of reflected light beams thereof intersect with each other, the plane mirror either reflects light exiting from the first concave mirror, while transmitting light exiting from the second concave mirror, or transmits light exiting from the first concave mirror, while reflecting light exiting from the second concave mirror, light beams exiting from the first and second concave mirrors are combined by the plane mirror so as to become light beams travelling coaxially and in the same direction, and the first concave mirror and the second concave mirror have the same shape, and the third concave mirror and the fourth concave mirror have the same shape.