Total internal reflection lens for color mixing
First Claim
1. A lens, comprising:
- a body member having an outer surface and an interior open channel extending longitudinally through the body member, the body member and the interior open channel being substantially symmetric with respect to an optical axis, the outer surface being shaped to provide total internal reflection,the body member having a first end surface region at a first end region of the open channel for accommodating a light source and a second end surface region opposite the first end surface region and surrounding a second end region of the open channel, the second end surface region including a plurality of refractive surface regions positioned around the second end region of the open channel,wherein the lens is configured to provide collimated light substantially centered with respected to the optical axis when the light source is positioned off the optical axis.
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Abstract
A total-internal-reflection (TIR) lens for color mixing includes a body member having an outer surface and an interior open channel extending longitudinally through the body member. The body member and the interior open channel are substantially symmetric with respect to an optical axis, and the outer surface is shaped to provide total internal reflection. The body member has a first end surface region at a first end of the open channel for accommodating a light source and a second end surface region opposite the first end region. The second end surface region includes a plurality of refractive surface regions positioned around the second end region of the open channel. The lens is configured to provide projected light substantially centered with respect to the optical axis when the light source is positioned off the optical axis. In a specific embodiment, a lighting apparatus for providing centered white light includes such a lens and a plurality of light sources.
84 Citations
17 Claims
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1. A lens, comprising:
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a body member having an outer surface and an interior open channel extending longitudinally through the body member, the body member and the interior open channel being substantially symmetric with respect to an optical axis, the outer surface being shaped to provide total internal reflection, the body member having a first end surface region at a first end region of the open channel for accommodating a light source and a second end surface region opposite the first end surface region and surrounding a second end region of the open channel, the second end surface region including a plurality of refractive surface regions positioned around the second end region of the open channel, wherein the lens is configured to provide collimated light substantially centered with respected to the optical axis when the light source is positioned off the optical axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A lens, comprising:
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a body member having an outer surface and an interior open channel extending longitudinally through the body member, the body member and the interior open channel being substantially symmetric with respect to an optical axis, the outer surface being shaped to provide total internal reflection, the body member having a first end surface region at a first end region of the open channel for accommodating a light source and a second end surface region opposite the first end surface region and surrounding a second end region of the open channel, the second end surface region including a plurality of refractive surface regions positioned around the second end region of the open channel, wherein the lens is configured to provide collimated white light substantially centered with respected to the optical axis when the light source is positioned off the optical axis. - View Dependent Claims (11, 12, 13, 14)
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15. A lens, comprising:
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a body member having an outer surface and an interior open channel extending longitudinally through the body member, the body member and the interior open channel being substantially symmetric with respect to an optical axis, the outer surface being shaped to provide total internal reflection, the body member having a first end surface region at a first end region of the open channel for accommodating a light source and a second end surface region opposite the first end surface region and surrounding a second end region of the open channel, the second end surface region including a plurality of refractive surface regions positioned around the second end region of the open channel, wherein the lens is configured to provide collimated white light substantially centered with respected to the optical axis, and wherein the light source comprises a red LED die, a green LE die, and a blue LED die, each of the LED dies being disposed off the optical axis. - View Dependent Claims (16, 17)
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Specification