Excelitas Canada, Inc.

Erik Sorensen

Yong Wang

Paul Constantinou

Stewart Clark

Douglas MacDonald

A method is disclosed for maintaining a desired optical output in a solid state illumination device, where the device is configured to accommodate multiple light emitting diodes (LEDs) and to combine light from the LEDs to produce a single optical output. The method includes testing the LEDs before adding them into the device. The testing produces characterizing information that describes how one or more optical properties (e.g., optical power and/or peak wavelength) of the tested LED change with temperature. This characterizing information is stored in a computer-based memory of the device, and the tested LED is added (connected) into the device. Then, during operation, temperature sensors measure a temperature associated with each respective LED in the device, and electrical current to one or more of the LEDs can be adjusted based on the measured temperatures associated with each LED and its stored characterizing information.

Maintaining stable optical output of solid state illumination system

A dispensing and ultraviolet (UV) curing system is disclosed with low backscatter. The system includes a dispenser for dispensing an ultraviolet (UV) curable material onto a substrate and a UV radiation source assembly coupled to the dispenser and operable to facilitate curing the UV curable material that has been dispensed onto the substrate. The UV radiation source assembly has a UV radiation source with a first optical axis and an optical element with a second optical axis. The second optical axis is different than the first optical axis. The optical element is configured such that, during operation, UV radiation from the UV radiation source passes through the optical element.

Dispensing and ultraviolet (UV) curing with low backscatter

Embodiments of a light source include a substrate having a first end and a second end opposite the first end. A plurality of solid state light emitting diodes (LEDs) form an array, with the plurality of LEDs mounted on the substrate in a row between the first end and the second end. The plurality of LEDs further have a first edge LED and a second edge LED having a first encapsulation lens height relative to the substrate. At least one interior LED having a second encapsulation lens height less than the first encapsulation lens height is disposed between the first edge LED and the second edge LED. The spacing between the plurality of LEDs is substantially uniform.

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Mississauga, Canada

Erik Sorensen