Light emitting diode unit for distance measuring system
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorIsami Hirai
Life of this patent
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Abstract
A light emitting diode (LED) unit is provided with an LED chip having a light emitting surface; and a transparent body enclosing the LED chip. The transparent body has a reflection surface that is arranged to face the light emitting surface to reflect a light beam emitted by the LED chip, and a light emerging surface that is a surface opposite to the reflection surface. The light beam emitted from the light emitting surface of the LED chip is reflected by the reflection surface, and then emerged from the light emerging surface. At least one of the reflection surface and the light emerging surface is formed to have a positive power so that a converging light beam is emerged from the light emerging surface
Claims15
A light emitting diode (LED) unit, comprising:
- an LED chip having a light emitting surface;
- and
- a transparent body enclosing said LED chip, said transparent body having:
- a reflection surface that is arranged to face said light emitting surface to reflect a light beam emitted by said LED chip;
- and
- a light emerging surface that is a surface opposite to said reflection surface,
- wherein the light beam emitted from said light emitting surface of said LED chip is reflected by said reflection surface, and then emerged from said light emerging surface, and
- wherein at least one of said reflection surface and said light emerging surface is formed to have a positive power so that a converging light beam is emerged from said light emerging surface.
A light emitting diode (LED) unit, comprising:
- an LED chip having a light emitting surface;
- and
- a transparent body enclosing said LED chip, said transparent body having:
- a reflection surface that is arranged to face said light emitting surface to reflect a light beam emitted by said LED chip;
- and
- a light emerging surface that is a surface opposite to said reflection surface, the light beam emitted from said light emitting surface of said LED chip being reflected by said reflection surface and then emerged from said light emerging surface;
- and
- a chart having a predetermined pattern, the light beam emerged from said light emerging surface forming an image of said predetermined pattern.
Dependencies are inferred from the claim text.