Patent ID: 7874714
Filing Date: 2011-01-25
Classification: G02B

Abstract:
1. An optical unit that introduces light emitted from a light emitting element through a proximal end side and emits the light through a distal end side comprising: a light condensing section; and a light transmitting section integrally formed at a distal end of the light condensing section with respective optical axes coincided with each other, the light condensing section includes a shape of a parabolic body of rotation substantially widening from a proximal end toward a distal end including a central lower concave section that opens at a proximal end face of the light condensing section to accommodate a light emitting element, a lower side parabola circumferential face to reflect light from the light emitting element inward and a cylindrical upper side face having a distal end face to introduce the light from the light emitting element into the light transmitting section, wherein the light transmitting section is in a substantially cylindrical shape, with a proximal end face of a smaller diameter than the light condensing section distal end face to provide a mounting surface, the proximal end face introduces the light from the light condensing section and includes a side circumferential face to reflect the light introduced from the proximal end face inward and a distal flat end face to emit the light introduced from the proximal end face.