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N-BK7 Plano Concave Lens With Both Surfaces AR Coating 1000-1700nm

Basic Information
Place of Origin: Wuhan,China
Brand Name: Wuhan Siwer Optics
Minimum Order Quantity: 10 pieces
Price: 3-20USD/piece
Packaging Details: 1.Tissue paper.plastic foam packaging film And hard carton box with quakeproof filler
Delivery Time: 4-5 weeks
Supply Ability: 2000 pieces/month
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Detail Information
Material: BK7 Type: Plano Concave
Diameter Range: 4-260mm Demension Tolerance: +/-0.1mm
Surface Quality: 40/20 Surface Accuracy: Lambda/4 In 25.4mm
Centration: 3 Arc Min Usage: Optical System
Coating: Customized

Product Description

N-BK7 Plano-Concave Lenses with both surfaces AR Coating 1000-1700nm

These Plano-Concave lenses, which are fabricated from RoHS-compliant N-BK7 glass, have a broadband antireflection coating for the 1050 - 1700 nm range. This coating greatly reduces the 4% losses per surface incurred when using an uncoated lens.
N-BK7 is one of the most common types of optical glass used for high quality optical components. It is typically chosen whenever the additional benefits of UV fused silica (i.e., good transmission further into the UV and a lower coefficient of thermal expansion) are not necessary.
These lenses, like all plano-concave lenses, have negative focal lengths and can be used to diverge collimated beams. In this case, the curved surface of the lens should face the source to minimize spherical aberration. In addition, they can be employed to offset the effects of spherical aberration caused by other lenses in an optical system.

 

Common Specifications
Lens Shape Plano-Concave
Substrate Material N-BK7 or H-K9L
Wavelength Range 350 nm - 2.0 µm
Diameter Tolerance +0.0/-0.1 mm
Thickness Tolerance ±0.1 mm
Focal Length Tolerance ±1%
Design Wavelength 587.6 nm
Index of Refraction@ 633 nm 1.515
Surface Quality 40-20 Scratch-Dig
Surface Flatness(Plano Side) λ/2
Spherical Surface Accuracy (Concave Side) 3λ/2
Surface Irregularity(Peak to Valley) λ/4
Abbe Number vd = 64.17
Centration <3 arcmin
Coating Ravg<0.5%@1000-1700

 

N-BK7 Plano Concave Lens With Both Surfaces AR Coating 1000-1700nm

N-BK7 Plano Concave Lens With Both Surfaces AR Coating 1000-1700nm

Production Line

N-BK7 Plano Concave Lens With Both Surfaces AR Coating 1000-1700nm

 

 

Contact Details
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