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Frequently Asked Questions

Bi-concave lenses are used to diverge incoming light or increase the focal length of an existing optical system.

The diameter range of the bi-concave lenses is 5.00-100.00 mm.

The surface quality of the bi-concave lenses is 40-20 for diameters between 5.00-25.00 mm and 60-40 for diameters between 25.01-100.00 mm.

The focal length tolerance of the bi-concave lenses is ±2%.

The bi-concave lenses can be uncoated or you can specify your coating from the available options in the coating chart.

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