Aspheric Lenses

LightPath Technologies Inc.

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LightPath Technologies Inc. has introduced a family of four aspheric lenses designed for laser diodes operating at 405 or 488 nm and as the primary optics for collimating blue lasers in a variety of applications including biomedical instrumentation such as flow cytometers, microscopes and fluorescence spectroscopy equipment.

Suitable for use also in high-volume data storage systems, the diffraction-limited molded aspheric glass lenses have a compact single-lens design that is optimized for the specific beam divergences, peak wavelength and window material of commercial blue diode lasers to deliver good performance and beam quality.

The L-LAL12 and D-LaK6 glasses are fully RoHS-compliant and are available as mounted lenses in the company’s MT lens holders.

The356300 model is designed for 405 nm and has a numerical aperture of 0.66, a focal length of 2.54 mm, an outer diameter of 4 mm, a clear aperture of 3.30 mm and a working distance of 1.55 mm. The 356785 version at 488 nm has a numerical aperture of 0.62, a focal length of 1.42 mm, an outer diameter of 2.75 mm, a clear aperture of 1.70 and a working distance of 0.86 mm. At 488 nm, the 357765 model has a numerical aperture of 0.61, a focal length of 4.0 mm, an outer diameter of 6.325 mm, a clear aperture of 4.80 mm and a working distance of 2.37 mm. And the 357775, at 405 nm, has a numerical aperture of 0.60, a focal length of 4.02 mm, an outer diameter of 6.325 mm, a clear aperture of 4.80 mm and a working distance of 2.41 mm.

All of the blue laser lenses are available with proprietary standard MLBB-A antireflection coating for 400 to 600 nm.

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Published: August 2010