3m Innovative Properties Company

Eye Lighting International of North America, Inc.

William E Phillips, Iii

Patrick Rene Destain

Michael W O'Keefe

John E Duncan

Jennifer L Grace

Stephen J Willett

Tomasz A Pol

Alexander A Glinski

Jiaying Ma

Zhisheng Yun

Jacob Moskovich

Todd S Rutherford

Ronald E English, Jr

An LED lighting apparatus and method provide efficient illumination in a downward and forward direction toward a preferential side, by mounting a plurality of LED devices to the apparatus in at least one horizontal row oriented perpendicularly to the downward and forward direction; mounting a vertical reflector behind and parallel to the horizontal row; and orienting the LED apparatus such that the vertical reflector extends substantially straight downward. A two axis orthogonally symmetric secondary lens is associated with each LED and the vertical reflector has a specular reflective front surface facing the LEDs. The vertical reflector may be curved around ends of the row of LEDs. Also it may be continued further downward, on the outside of a cover lens, by a backlight shield with a straight linear outer edge that extends horizontally across an uplight ring shield. The backlight shield may have a specular or diffuse reflecting front surface.

LED lighting apparatus with reflectors

A projection subsystem includes a light engine that provides a collection lens, a collimator and at least one solid state light emitter. A projection lens assembly receives the image and provides a projection beam having a luminous flux level. The projection subsystem has a portability efficacy.

Optical projection subsystem

An image forming system is described that includes a light source that provides a light beam and an anamorphic refractive optical element. A first outer surface of the anamorphic element faces the light source and includes a toric surface. The light beam is incident upon the first outer face and then an incident surface of the anamorphic element. The anamorphic element directs the light beam to an image forming device. An illumination system is also described where an anamorphic element includes a toric surface and a facet surface.

Optical element having a toric surface

A light source module is disclosed. The light source module includes an emitter having a light emitting surface, a solid integrating optic aligned to accept light emitted from the emitter at an entrance face and deliver light to an exit face, and a lens aligned to receive light from the exit face. The lens has a substantially hemispherical portion having a radius of curvature and the exit face of the solid integrating optic has an exit face diagonal. The ratio of the radius of curvature to the exit face diagonal is greater than 0.7. The solid integrating optic and the lens each have an index of refraction, and the ratio of the lens index of refraction to the solid integrating optic index of refraction is greater than unity.

Light source module

Optical element having a toric surface and method of making

A light engine has a light source front surface that emits non-collimated light. A collection lens collects the non-collimated light and provides incompletely collimated light. A collimating lens receives the incompletely collimated light and provides a collimated image. A non-orthogonal polarizing filter receives the collimated image and passes a polarized portion of the collimated image as a direct component of the polarized light engine image. The non-orthogonal polarizing filter reflects a recycled image back to the front surface. The non-orthogonal shape of the polarizing filter is selected according to the pattern of light on the light source front surface.

LED illumination system with polarization recycling

A light source module is provided comprising an emitter having at least one light emitting surface and an at least partially hollow integrating optic mounted over the emitting surface; where the index of refraction within the hollowed area is less then the index of the subsequent medium along the optical path. The integrating optic has a proximal end facing the emitting surface and a distal end facing away from the emitting surface. The distal end of the integrating optic is flat and has a rectangular aspect ratio which can differ from the aspect ratio of the emitter. One or more optical films and/or an optical component such as a collection lens can be adhered to the distal end of the integrating optic.

Integrating light source module

A polarizing beam splitter that includes at least one prism, and a reflective polarizing film. The prism comprises a first polymeric material, and has at least one curved outer surface and an incident surface, where the reflective polarizing film is disposed adjacent the incident surface.

Polarizing beam splitter

A polarizing beam splitter is disclosed that includes a first prism, a second prism, and a reflective polarizing film disposed between the first prism and the second prism. The first prism comprises a first polymeric material, and has a first outer curved surface and an additional outer surface. The second prism comprises a second polymeric material, which in some embodiments may be the same as the first polymeric material, and has a second outer curved surface.

Growing community of inventors

Cincinnati, OH, United States of America

William E Phillips, Iii