Light-source device, in particular for use in a micromirror device

Abstract

The invention proposes a light-source device, in particular for use in a micromirror device, comprising a first red light source for emitting light in the red spectral range, a second red light source for emitting light in the red spectral range, a green light source for emitting light in the green spectral range and a blue light source for emitting light in the blue spectral range, and superposition means, wherein the superposition means are arranged in such a way that the light from the first red light source, the light from the second red light source, the light from the blue light source and the light from the green light source are superposed in a collinear manner to form a common light beam, the light from the first red light source having a wavelength different from that of the light from the second red light source.

Description

technical field [0001] The invention relates to a device according to the preamble of the main claim. Background technique [0002] Such light source arrangements are generally known in various variants and are also referred to as RGB modules. The development of powerful laser sources of increasingly smaller dimensions has made said light source devices an important component of micromirror devices or micromirror actuators, because despite their small spatial extension they can still Produces bright colored pixels. In this case, the light source arrangement only uses the light that is actually required. The micromirror arrangement can form in the future, for example, a core component of a pico-projector, a mini-barcode scanner or a device for endoscopy. However, the use of laser light is disadvantageous in that the high coherence of the laser light leads to speckle effects caused by interference on the screen towards which the light is directed. The use of semiconductor ...

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Therefore, the resolving power is degraded in an unfavorable way

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