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Convex lens

Biconvex Lens

Name: Biconvex Lens
Place of Origin: Shaanxi, China
Surface quality: 20/10--80/60
Supply Ability: 100000 Piece/Pieces per Month
Description: Biconvex Lens
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Material: K9, BK7, FS, UVFS, CaF₂, ZnSe

Diameter:3mm-200mm±0.05mm

Center Thickness Tolerance:±0.05mm

Lens Alignment Error:≤3min

Surface Accuracy:λ/ 8 @

Surface Quality:40/20. 60/40. 80/60

Effective Caliber: 90%

Biconvex lens is a lenticular lens sheet that includes an incident surface and an exit surface, and is characterized in that the focal length of the middle part of the lens surface is longer, and the focal length of the ends of each lens surface is shorter. The lenticular lens is mainly used to condense the light from a point light source or transmit an image to other optical systems.

Example with BK7 material：These N-BK7 biconvex lenses are available uncoated or with one of five antireflection coatings (-A, -AB, -B, -C, or -D), which reduces the amount of light reflected from each surface of the lens (see the Selection Guide table below for coating option). Since approximately 4% of the incident light is reflected at each surface of an uncoated substrate, the application of an AR coating improves transmission, which is important in low-light applications, and prevents the undesirable effects (e.g., ghost images) associated with multiple reflections. Having optics that are AR coated on both surfaces is particularly desirable for applications utilizing multiple optical elements. Please see the Graphs tab for additional coating information.

N-BK7 Biconvex Lens Selection Guide
Coating name	wavelength band
Uncoated	Uncoated
A Coating	350nm-700nm
AB Coating	400nm-1100nm
B Coating	650nm-1050nm
C Coating	1050-1700nm
D Coating	1650nm-3000nm