Frequently Asked Questions

The Bi-Concave Lens is made from various optical glasses including BK7, H-K9L, UVFS, Germanium, Silicon, CaF2, MgF2, ZnSe, ZnS, and Sapphire.

The diameter of the Bi-Concave Lens ranges from 0.35mm to 700mm.

The surface quality of the lens is rated at 10-5.

The surface irregularity is λ/10 at 632.8nm or can be customized as per customer design.

The thickness tolerance of the lens is +0/-0.02mm.

The lens can be coated with Single Mag2 or Multiple Layers AR Coating, with options for wavelength ranges A: 350-650nm, B: 650-1050nm, C: 1050-1585nm, or a custom design.

The clear aperture is greater than 90% of the diameter.

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