 Device for mounting a glass pane on an oven door |
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| Coaxial dual primary heat exchanger |
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| Illumination panel |
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| Necktie with a flat flashlight concealed therein |
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| Food oven and smoker device |
| OF THE PREFERRED EMBODIMENT Referring to FIG. 1, there is shown the improved food oven apparatus 10... |
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| Heat treatment of food with flow-dependent control |
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| Oven with excess steam treatment device |
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| Cooking apparatus |
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Light extraction from LEDs with light pipes
| Details |
Inventors: Parkyn, Jr., William A.; Pelka, David G.;
Assignee: Teledyne Lighting and Display Products, Inc. (Hawthorne, CA)
Primary Examiner: Ben; Loha
Assistant Examiner:
Attorney, Agent or Firm: Kirkpatrick & Lockhart LLP
A non-imaging optical coupler that is a figure of revolution combining a light-transmitting body defining a recessed input cavity, a transparent droplet-shaped encapsulant of a light-emitting diode, or array of diodes in the cavity, the body having a curved side wall shaped to totally internally reflect all the light emitted from the LED and encapsulant, traveling toward the side wall, within a predetermined distance from the diode or center of array, the body having a cylindrical transition section extending from a curved side wall and forwardly, and a planar exit face at the forward end of the body, transverse to the central axis of the figure of revolution. |
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DETAILED DESCRIPTION It is a major object of the invention to provide a solution and/or solutions to the above problems and difficulties.
Basically, a non-imaging coupler is provided, as in the form of a figure of resolution (about the optical axis), and comprises a) a light transmitting body defining a recessed input cavity, a transparent-droplet encapsulant for a light emitting diode, or for an array of diodes in the cavity, b) there being a body curved side wall shaped to totally internally reflect all the light emitted from the LED and encapsulant within a predetermined distance from the diode or center of said array, c) there being a body cylindrical transition section extending from said curved side wall, and forwardly, and d) a planar exit face at the forward end of the body, transverse to an axis of said figure of revolution.
It is another object to provide, in association with the coupler, an endwise transparent rod that is juxtaposed to said body exit face, in order to receive light from the coupler.
A bend is typically provided at the distal end of the rod when delivering light to a dental-curing site in a patient's mouth.
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