Abstract: A camera flash is provided with a lens element adjacent a light source, wherein the lens element has a plurality of concentric ridges projecting from a surface of the generally planar member to define facets of a Fresnel lens, and wherein the plurality of concentric ridges define a generally square or rectangular shape having rounded corners.

Abstract: An optical element for use with a white LED to absorb blue light and re-emit warmer light is made of an admixture of an optically transmissive polymeric material, a first luminescent compound that predominantly absorbs light at wavelengths between 380 nm and 580 nm and predominantly re-emits light at wavelengths between 620 nm and 740 nm, and a second luminescent compound that predominantly absorbs light at wavelengths between 380 nm and 490 nm and predominantly re-emits light at wavelengths between 495 nm and 590 nm. The optical element, which may be a lens for defracting light into a desired beam pattern, eliminates substantially all blue light emitted from the white LED and re-emits a warmer light having a color temperature below 3000 Kelvin and a color rendering index (CRI) above 80.

Abstract: A luminaire having an array of light emitting diodes on a circuit board, and a generally planar lens element adjacent each of the LEDs, wherein each lens element has a plurality of concentric ridges projecting from a surface of the lens member to define Fresnel facets for redirecting light emitted from the corresponding LED, providing more uniform light distribution in a compact configuration.

Abstract: An illuminating optical lens article of manufacture for use with a light emitting diode (LED) mounted on a circuit board has (a) a base portion defining a rim on a plane having a bottom surface around a longitudinal axis for mounting over the LED; (b) an integral refractive outer surface of the lens extending towards the longitudinal axis from the base; (c) an integral refractive inner surface of the lens extending from the base forming a cavity shaped and sized to receive an LED; and optionally (d) a plurality of grooved sections for receiving an adhesive formed on the bottom surface of the base portion. The base is adapted to be mounted on the circuit board onto which the LED is mounted. The integral refractive outer and inner surfaces each define a predetermined geometry adapted to direct and focus light emitting from the LED to a predetermined path.

Abstract: An illuminating optical lens article of manufacture for use with a light emitting diode (LED) mounted on a circuit board is provided. The lens has (a) a base portion defining a rim on a plane having a bottom surface around a longitudinal axis for mounting over the LED; (b) an integral refractory outer surface of the lens extending towards the longitudinal axis from the base; (c) an integral refractory inner surface of the lens extending from the base forming a cavity shaped and sized to receive an LED; and optionally (d) a plurality of grooved sections for receiving an adhesive formed on the bottom surface of the base portion. The base is adapted to be mounted on the circuit board onto which the LED is mounted. The integral refractory outer and inner surfaces each define a predetermined geometry adapted to direct and focus light emitting from the LED to a predetermined path. The lens is fabricated with a tolerance range of within 0.15 mm or better.