Brand: Bena
Certification: Reach
Support Customization: Oem
Place Of Origin: China
Packaging: Carton
Productivity: 80000000pcs/year
Transportation: Air, DHL
Place of Origin: Changchun
Supply Ability: 80000000pcs/year
Certificate: ISO9001
HS Code: 90019090
Port: Dalian,Changchun,Beijing
Payment Type: T/T
Incoterm: FOB,CFR,CIF,EXW,FCA
When used in light sparse medium, it can diverge the incident beam, so it is also called divergent lens. It is also called negative lens because its focal length is negative. For thin concave lens, the imaging formula, transverse magnification formula and sign rule are the same as those for convex lens. The image formed by biconcave lens is always smaller than the vertical virtual image of the object. Biconcave lens is mainly used to correct myopia. Myopia is mainly due to the deformation of the lens, resulting in the premature collection of light in front of the retina. The biconcave lens plays the role of divergent light. The biconcave lens becomes an upright and reduced virtual image, which lengthens the image distance and just falls on the retina. Product advantages It integrates material growth, component processing, coating and devices Self produced materials: calcium fluoride CaF2, barium fluoride BaF2, magnesium fluoride MgF2, lithium fluoride LIF, silicon Si, germanium Ge materials are grown by themselves. Self processing: blank forming, fine grinding, polishing and coating are completed in the factory. Reliable quality: mature process and perfect inspection process. Controllable delivery time: one-stop processing, quality control supervision and delivery guarantee. 
Product Categories : Optical Lenses > Biconcave Lenses
Founded in 2014, Bena was co-founded by several experienced engineers who have more than 10 years of optical design, process, production and test. We provide customization service for high precision (rms = 1/100λ, λ=632.8nm), large diameter plane mirror (>500mm) and aspherical lens, as well as professional spherical lens (such as optical domes with diameter 280mm), involving different materials including K9, Silicon, Sapphire, SiC, glass ceramics, fused silica, and other various optical glasses, and we can also deal with the nickel-phosphorus alloy surface on different substrates.
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