K9 Biconvex lens

Calcium fluoride Caf2 biconvex lens
  • Biconvex lens consists of two spherical radii, which effectively eliminates coma, distortion and color difference. They are combined with other lenses to form an imaging system.
  • This type of lens is suitable for the following cases: the object and image are on both sides of the lens, and the ratio of image distance to object distance (conjugate ratio) is between 0.2 and 5.
  • K9 biconvex spherical lens has good transmittance in near infrared (350-2000nm).
  • H-K9L(N-BK7) is an optical glass commonly used in the preparation of optical elements.
  • These uncoated biconvex lenses are prepared using H-K9L(N-BK7) conforming to ROHS standard. The collimated beam can converge on the rear focus, or the point light source can be changed into a collimated beam.
Technical parameters
Items Parameters
Material optical glass, H-K9L (N-BK7)
Radius of curvature ± 1mm - ± 50000mm ± 1%
Diameter 3mm-300mm ± 0.1mm
Center thickness tolerance ± 0.05mm (we can process to ± 0.01mm with high precision)
Center deviation 3′(we can process to 30 ″with high precision)
Surface accuracy λ/ 8 (high precision, we can process to 1 / 10λ)
Surface quality 40/20 (we can process to 10-5 with high precision)
Effective caliber ≥90%
Coating multilayer antireflective film A:350-650nm B:650-1050nm C:1050-1580nm
spectral curve

In addition, we have thousands of stock of K9 Biconvex lens, biconcave lens, plano concave lens, plano convex lens, meniscus lens and so on. The price is preferential and the quality is excellent, which can meet your demand for a small order.

For details, please consult:

Related Products
Contact Form Demo (#3)