optical glass bk7 convex lenses for Microscope

Optical glass BK7 Convex Lens for microscope can be used in precision optical instruments such as microscope. BK7 may be the most commonly used optical glass for making high-quality optical elements. This optical glass is usually used when other advantages of UV fused quartz are not required (i.e. good transmittance and low coefficient of thermal expansion in the UV region). The quality of the convex lens produced by our company is strictly controlled, and has been highly praised by customers with high-quality products and after-sales service.

Material: K9, BK7, FS, UVFS, CaF₂, ZnSe

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 Double- Convex 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

Other series products：

Meniscus Lens  Visible Light Optical Window  Achromatic Lens Silicon Window Zinc Selenide Window