Good Quality bk7 k9 Ball Lens Spherical Mirror
Spherical Lenses are solid or hollow glass beads with a diameter of several micrometers to tens of micrometers. The application fields involve chenical industry, military industry, aerospace, transportation, petroleum, light industry, medical treatment, etc. Spherical lens is an important optical element, used for oupling between optical fiber, between laser and optical fiber and between optical fiber and detector, or used for the collimation of optical fiber beam in thin film filter dense wavelength division multiplexer.
Material: K9, BK7, FS, UVFS, CaF₂, ZnSe
Diameter:3mm-200mm±0.05mm
Center Thickness Tolerance:±0.05mm
Lens Alignment Error:≤3min
Surface Accuracy:λ/ 10 @
Surface Quality:40/20. 60/40. 80/60
Effective Caliber: 90%
Example with BK7 material：These N-BK7 Meniscus Lens 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.
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