Vehicle headlamp and illuminating device
First Claim
Patent Images
1. A vehicle headlamp, comprising:
- an excitation light source that emits excitation light;
a light emitting part that emits light upon receiving the excitation light emitted from the excitation light source; and
an optical system that distributes the light emitted from the light emitting part,the light emitting part having a luminance greater than 75 cd/mm2, andan area size of the optical system, when viewed from a direction in which the light travels outward from the vehicle headlamp, being less than 1500 mm2, and at least 100 times as large as an area size of a surface of the light-emitting part, which surface receives the excitation light.
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Accused Products
Abstract
A headlamp 1 includes a laser diode 3 that emits a laser beam, a light emitting part 7 that emits light upon receiving the laser beam emitted from the laser diode 3, and a reflection mirror 8 that reflects the light emitted from the light emitting part 7. According to the headlamp 1, the light emitting part 7 has a luminance greater than 25 cd/mm2, and an area size of an aperture plane 8a perpendicular to a direction in which an incoherent light travels outward from the headlamp 1 is less than 2000 mm2.
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Citations
7 Claims
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1. A vehicle headlamp, comprising:
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an excitation light source that emits excitation light; a light emitting part that emits light upon receiving the excitation light emitted from the excitation light source; and an optical system that distributes the light emitted from the light emitting part, the light emitting part having a luminance greater than 75 cd/mm2, and an area size of the optical system, when viewed from a direction in which the light travels outward from the vehicle headlamp, being less than 1500 mm2, and at least 100 times as large as an area size of a surface of the light-emitting part, which surface receives the excitation light. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An illuminating device, comprising:
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an excitation light source that emits excitation light; a light emitting part that emits light upon receiving the excitation light emitted from the excitation light source; and an optical system that distributes the light emitted from the light emitting part, the light emitting part having a luminance greater than 75 cd/mm2, and an area size of the optical system, when viewed from a direction in which the light travels outward from the illumination device being less than 1500 mm2, and at least 100 times as large as an area size of a surface of the light-emitting part, which surface receives the excitation light.
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Specification