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FAC lens



The J10919 series FAC lens is an optical lens that collimates light spreading from a semiconductor laser (LD) in the fast-axis direction. LD have a large divergence angle in the fast-axis direction, so the output light cannot be efficiently used unless collimated. The FAC lens collimates light spreading from a LD into a narrow beam with a radiation angle of several milliradians (mrad) or less so that the diverging light can be efficiently utilized.

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Collimating light


Aspheric micro-cylindrical lens

Highly efficient utilization of light from LD bar

Small variations in characteristics allow mass production

Minimized smile and side lobes due to high-precision fabricating technology

Output distribution image

Output distribution image when installed to LD


Dimensional outlines (Unit mm)

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