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US 6,296,376 B1Granted
Led lamp having a prismatically-cut modifier
AssigneeStanley Electric Co., Ltd.
InventorsToshiyuki Kondo, Yoshifumi Kawaguchi, Tadashi Nomura, Nobumichi Aita
Life of this patent
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Abstract
An LED lamp includes a first optical member and a second optical member. The first optical member is for providing light from an LED chip, provided with at least one of a concave mirror and a dome lens, at an appropriate illumination angle. The second optical member is a lens positioned to receive light from the first optical part via an air layer. At least one surface of the second optical member is a prismatically cut surface.
Claims10
An LED lamp comprising:
- a first optical member for providing light, from an LED chip provided with at least one of a concave mirror and a dome lens, at an appropriate illuminating angle;
- and
- a second optical member for diffusing light from the first optical member via an air layer and shaped as a lens in such a manner that a composite focal point thereof substantially coincides with the position of the LED chip,
- wherein at least one surface of the second optical member is a prismatically cut surface,
- and the second optical member has a convex surface facing the LED chip.
2 more elements
Dependencies are inferred from the claim text.