1
John Popovich, David G Pelka, William A Parkyn, Michael J Popovich, Eric D Pelka: Lighting apparatus. Teledyne Lighting and Display Products, Kirkpatrick & Lockhart, June 24, 2003: US06582103 (254 worldwide citation)

An illumination apparatus provides an output with high spatial uniformity of luminance. The illumination apparatus includes a cavity that has reflective surfaces and an output area. At least one light source is disposed in the cavity, with the light source including a point source (such as an LED) a ...


2
David G Pelka, William A Parkyn Jr: Multiple wavelength light processor. TIR Technologies, William W Haefliger, August 12, 1997: US05655832 (155 worldwide citation)

A radiant energy redirecting system, comprising at least two light-emitting sources, each emitting different frequency light; an optical cavity receiving light output from the sources, to mix therein, and act as a secondary emitter; a light receiver positioned to be illuminated by light from the sec ...


3
William A Parkyn Jr, David G Pelka: TIR lens for waveguide injection. TIR Technologies, William W Haefliger, September 15, 1998: US05806955 (149 worldwide citation)

A radiant energy redirecting system comprising a radiant energy transmitting body structure; the structure comprising multiple elements, each of which acts as a radiant energy redirecting module, having on its cross-sectional perimeter an entry face to receive incidence of the energy into the interi ...


4
William A Parkyn Jr, David G Pelka: Light extraction from LEDs with light pipes. Teledyne Lighting and Display Products, Kirkpatrick & Lockhart, May 6, 2003: US06560038 (144 worldwide citation)

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 ref ...


5
Juan C Mi overscore, Pablo Benitez, William A Parkyn Jr, Waqidi Falicoff: Optical device for repositioning and redistributing an LEDs light. Light Prescriptions Innovators, Thomas F Lebens, Sinsheimer Schiebelhut & Baggett, April 4, 2006: US07021797 (132 worldwide citation)

An optical device is for spatially displacing the output of a light-emitting diode (LED) and coupling the output to a predominantly spherical emission pattern produced at a useftul height above the LED. The device is made of a transparent dielectric material, such as an injection-molded plastic. It ...


6
Vladimir Medvedev, William A Parkyn Jr: Beam-forming lens with internal cavity that prevents front losses. TIR Technologies, William W Haefliger, May 26, 1998: US05757557 (122 worldwide citation)

A device for directing light longitudinally forwardly, that comprises a lens body having a front face facing forwardly, rearward body extent, and a curved sidewall extending between the rearward body extent and the front face; a rear cavity in the body, the cavity having a sidewall and a front wall ...


7
David G Pelka, William A Parkyn: Strip lighting apparatus and method. Teledyne Lighting and Display Products, Kirkpatrick & Lockhart, October 28, 2003: US06637924 (121 worldwide citation)

An illumination apparatus comprises an elongated waveguide having proximal and distal ends and a central longitudinal axis. The waveguide includes an elongated forward side for outputting light and an elongated rearward side having an elongated reflective surface for reflecting light towards the for ...


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William A Parkyn Jr, David G Pelka, John M Popovich: Faceted totally internally reflecting lens with individually curved faces on facets. TIR Technologies, William W Haefliger, April 11, 1995: US05404869 (116 worldwide citation)

A radiant energy redirecting system comprising a radiant energy transmitting body structure; the structure comprising multiple elements, each of which acts as a radiant energy redirecting module, having on its cross-sectional perimeter an entry face to receive incidence of the energy into the interi ...


10
William A Parkyn Jr: Illuminating lens designed by extrinsic differential geometry. Teledyne Lighting and Display Products, William W Haefliger, July 20, 1999: US05924788 (114 worldwide citation)

An illumination system with a prescribed output pattern comprising a light source and an optical lens redirecting the light of the source into an output beam, the lens with multiple surfaces at least one of which has a shape that is not a surface of revolution, the shape generated by the following m ...