Abstract: A method for the manufacture of a light emitting device is provided. The method comprises the steps of: providing a substrate (102) on which at least one light emitting diode (101) is arranged and; arranging a collimator (103), at least partly laterally surrounding said at least one light emitting diode, by bonding said collimator to said at least one light emitting diode and said substrate using a transmissive bonding material (104). By using the inventive method, the collimator can be arranged after the placement of the LED, which facilitates the placement of the LED.

Abstract: A method for the manufacture of a wavelength converted light emitting device is provided. A light curable coating material is arranged on the outer surface of a wavelength converted light emitting diode. The light curable coating material is cured, in positions where a high intensity of unconverted LED-light encounters the curable coating material. The method can be used to selectively stop unconverted light from exiting the device, leading to a wavelength converted LED essentially only emitting converted light.

Abstract: The invention relates to an illumination system (100), a projection device, and a color wheel (20, 22, 24). The illumination system comprises a light source comprising a first light-emitting unit (50) and a second light-emitting unit each emitting light towards a light output window (110). The illumination system comprises the color wheel comprising a plurality of color segments (R, G, B), a boundary between two adjacent color segment being a spoke (40). The first light-emitting unit, the second light-emitting unit and the spoke are configured for preventing the spoke when transiting the optical path (80) between the light source and the light output window to simultaneously transit a first optical path between the first light-emitting unit and the light output window and a second optical path between the second light-emitting unit and the light output window.

Abstract: A lighting device (1) comprising an LED-unit (5), a collimator (2) and a housing (3), the LED-unit (5) is rigidly coupled to the collimator (2) only, so that no substantial forces can be applied to the LED-unit (5). A non-rigid heat transferring medium (10) is provided in a cavity (12) in the housing (3), to dissipate heat, generated by the LED-unit (5). The LED-unit (5) is therefore at least partly contained in the heat transferring medium (10).