Light projection apparatus, light condensing unit, and light emitting apparatus
View Patent ↗A light projection apparatus that can produce an elongate light projection pattern is provided. The light projection apparatus includes a fluorescent member which is excited with exciting light and a light projecting member which reflects or transmits the light emanating from the fluorescent member to project it outside. The fluorescent member includes an irradiated region which is irradiated with the exciting light, and the length of the irradiated region in a first direction is greater than its length in a second direction.
1. A light projection apparatus, comprising:
a fluorescent member which is excited with exciting light; and
a light projecting member which reflects or transmits light emanating from the fluorescent member to project the light outside, wherein
the fluorescent member includes an irradiated face, and
the irradiated face includes an irradiated region which is irradiated with the exciting light such that a length of the irradiated region in a first direction is greater than a length of the irradiated region in a second direction perpendicular to the first direction and parallel to the irradiated face of the fluorescent member.
2. The light projection apparatus according to claim 1 , further comprising a light condensing member which includes a light entrance face through which the exciting light enters and a light exit face that has a smaller area than the light entrance face and through which the exciting light exits, wherein
a length of the light exit face in the first direction is greater than a length of the light exit face in the second direction.
3. The light projection apparatus according to claim 1 , wherein
the irradiated region has a rectangular, elliptical, or elongate hexagonal shape.
4. The light projection apparatus according to claim 1 , wherein
the light projecting member includes a reflecting member which reflects the light emanating from the fluorescent member to project the light outside.
5. The light projection apparatus according to claim 1 , wherein
the exciting light includes laser light.