Hanzhong Hengpu Photoelectric Technology Co.,Ltd
HomeProductsSpherical LensesConcave Lens50.8mm glass biconcave glass optical lens

50.8mm glass biconcave glass optical lens

  • $35.6
    10-99
    Piece/Pieces
  • $12.5
    100-999
    Piece/Pieces
  • $4.5
    ≥1000
    Piece/Pieces
Payment Type:
T/T,L/C,Paypal,Western Union
Incoterm:
FOB,CFR,CIF,EXW
Min. Order:
1 Piece/Pieces
Transportation:
Ocean,Land,Air,Express,Others
Port:
Shanghai,Shenzheng,Xiaan
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  • Product Description
Overview
Product Attributes

Place Of OriginChina

Diameter:3-300mm+-0.05mm

Center Thickness Tolerance+-0.05mm

Parallel Error≤3min

Surface Accuracyλ/10@

Effective Caliber90%

Focal Length Tolerance+-1%

Surface Quality40-20 scratch & dig

Working Wavelengthcustomer inquirement

MaterialBK7, FS, UVFS, CaF₂, ZnSe

Product Name:biconcave

Supply Ability & Additional Information

TransportationOcean,Land,Air,Express,Others

Supply Ability5000 pieces per month

PortShanghai,Shenzheng,Xiaan

Payment TypeT/T,L/C,Paypal,Western Union

IncotermFOB,CFR,CIF,EXW

Packaging & Delivery
Selling Units:
Piece/Pieces
Picture Example:

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.


bi concave lens

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 biconcave 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 bi-Concave 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:

  Concave lens    Achromatic Lens   Ball Lens  Silicon Window Zinc Selenide Window Wedge Optical Window



Product Categories : Spherical Lenses > Concave Lens

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