MSE supplies customized Double Concave Lenses with different materials, dimension, surface qualify, etc.

Double Concave Lenses, which are also called Biconcave Lenses, are lenses with symmetric concave curvature on both size. They are used for light protection, image reduction and beam expansion. Some times they are also used to extend the focal length. It is widely used in optical field such as laser, projection, etc.

MSE Supplies can offer a variant of optical elements, with different material, size, surface quality and coating. Please contact us for customization or bulk orders.

Technical Data:

Parameters	Value
Material	Optical Glass Fused Silica Silicon Germanium ZnSe Sapphire CaF₂ MgF₂ BaF₂
Diameter (mm)	0.5-500
Diameter Tolerance (mm)	+0/-0.01~+0/-0.1
Thickness Tolerance (mm)	±0.01~±0.1
Focal Length Tolerance (%)	±1
Irregularity (P-V) @ 632.8nm	λ/10~λ/2@632.8
Surface Quality	10/5~60/40
Centration	<30”~3'
Clear Aperture (%)	>90
Bevel	Protective bevel as needed
Coating	Uncoated, AR, BBAR