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Areal Illumination Diode Lasers

Photonics.com
Mar 2011
DILAS Diodenlaser GmbHRequest Info
 
MAINZ, Germany, March 18, 2011 — Dilas is now producing diode laser modules for homogenized areal illumination.

Homogenization of radiation is important in thermal and medical applications. The company is using active mixing of the laser radiation with crossed microlens arrays, resulting in a defined rearrangement of the light. This concept is suitable for use in medical applications such as hair removal and dermatology, as well as for thermal treatments in industrial environments.

The process leads to uniformity of >95% with steep edges and no spikes in a square-shaped 12 × 12-mm spot with a defined working distance of 62 mm. The square shape is best for rasterization of larger areas with no overlap and very high coverage of the area. Other geometries are available upon request, according to customer specifications.

The homogenization optics is suitable for a variety of fast-axis collimated diode laser beams, and it can be attached to a variety of the company’s products, such as the 12-bar water-cooled stack, delivering up to 1-kW pulse power in the millisecond range and, because of its compact size, suitable for integration into a hand piece for hair removal.

Attached to any proprietary conduction-cooled high-power multibar modules, the technology can generate various homogeneous line geometries for thermal transformation processes, such as in thin-film photovoltaic applications.


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GLOSSARY
collimation
1. The process of aligning the optical axes of optical systems to the reference mechanical axes or surfaces of an instrument. 2. The adjustment of two or more optical axes with respect to each other. 3. The process by which a divergent beam of radiation or particles is converted into a parallel beam.
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