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Jenoptik experiences surge in demand for GaP devices

The gallium phosphide based microoptic products are primarily used in the medical industry
Microlenses, microlens arrays, and diffractive optics are used for homogenisation of laser beams for laser eye surgery and aesthetic skin treatment.

They create multi-spot arrays for ophthalmic diagnostics, for collimating and shaping laser beams for surgical applications, and for imaging applications such as optical coherence tomography and scanning confocal microscopy.

Recent advances in near infrared (NIR) and mid-wavelength infrared (MWIR) quantum cascade and fibre lasers in conjunction with new diagnostic and treatment approaches are placing new demands on microoptics for these applications.

These needs include a broad NIR - MWIR transmission, high numerical aperture (NA), and small form factor for minimally invasive applications.

Jenoptik´s Grayscale lithographically fabricated GaP microlenses and microlens arrays meet these demands with:

1) A broad wavelength range from 600 nm beyond 5 µm

2) A high refractive index of 3.1 allowing a single element lens or lens array with NA’s up to 0.85.

3) Complex surface shapes providing for beam collimation and circularization of high divergence diode lasers with a single element.

Scanning confocal microscopy and minimally invasive optical coherence tomography are two examples where a single GaP microlens or microlens array can be used to extend the wavelength range over traditional GRIN and silicon lenses.

Jenoptik’s says it fabricates complex aspheric elements with high numerical aperture also provide for better imaging performance when compared with GRIN lens based systems.

What's more, standard manufacturing processes are available for a range of different optical materials such as SiO2, GaAs, CaF2, Al2O3, ZnS, ZnSe, Ge, and chalcogenide glass.

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