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F-Theta Lenses

Photonics.com
Jun 2011
JENOPTIK Optical Systems GmbH, Optics Business UnitRequest Info
 
JENA, Germany, June 20, 2011 — The Optical Systems Div. of Jenoptik has demonstrated new f-Theta fused-silica lenses for laser materials processing and other high-power laser applications, and a new generation of LED point source dies.

The lenses operate at wavelengths of 266 and 355 nm. They offer the benefits of standard f-Theta lenses, yet provide a higher damage threshold.

The diffraction-limited objective lenses feature high spot uniformity over the entire scan range. They are intended for laser powers of up to 2 kW at 1070 nm. Their coatings have been optimized for fused-silica optics that warrant low absorption.

The new generation of LED point source dies emit red light and generate a circular emission area that can easily be imaged and focused. Emission is at 650 nm.

Compared with the previous generation, the new point source dies generate a five-times-higher luminous intensity, according to the company. The high efficiency results in extended battery life, which makes them suitable for portable applications. The high current capacity of up to 500 A/cm² and the low switching times make them suitable for data transfer applications. They offer a lifetime of 100,000 h at 100 A/cm².

The LED point source dies are supplied in standard and customized versions of different shapes and spot diameters, variable up to 200 µm. They can be used to replace vertical-cavity surface-emitting semiconductor lasers, as radiation sources for rotation transducer sensors, as miniature light points in optical sights, as focused beams for light barriers and in dot-line arrays for printers.


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