Custom Optical Glass Lenses Beam Expanding Double Bi Concave Lens Anti-Reflecting Coating

US$2.20 - 7.90 5 Pieces (MOQ)
Port:
Shanghai, China
Production Capacity:
50000pieces/Month
Payment Terms:
L/C, T/T, D/P, Western Union, Paypal, Money Gram, Online
Rating: 5.0/5

Last Login Date:

Jul 09, 2025

Business Type:

Manufacturer/Factory

Main Products:

Spherical Lens, Cylindrical Lens, Optical Window, Mirror, Prism, Filter, Metal Base Mirror, Other High-Precision Optical Elements, Optical Coatings

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Product Description

Company Info

Basic Info.

Model NO.
2127
After-sales Service
After Sales Worry Free
Warranty
1 Years
Usage
Lighting, Medical, Optical, Photography
Type
Convex Lens
Transmittance
>95%
Shape
Single-lens
Material
Optical Glass
Lenses Color
Clear
Certification
ISO9001
Customized
Customized
Coating
HC
Radius of Curvature
± 1mm - ± 50000mm ± 1%
Outer Circle
3mm-500mm ± 0.1mm
Center Thickness Tolerance
: ± 0.05mm
Center Deviation
:3′
Surface Accuracy
λ/ 8
Surface Quality
60/40
Effective Caliber
≥90%
Transport Package
Standard Export Carton Protection & Close Package
Specification
3-500mm
Origin
Shaanxi
HS Code
9001909090

Product Description

 
Biconcave lens is similar to plano concave lens. The focal length is negative, but the light incident in parallel diverges outward. The curvature radii of the two sides of double concave lens are equal. It is generally used for beam expansion and projection.

K9 biconcave 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 biconcave 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

 

ItemsParameters
Materialoptical glass, H-K9L (N-BK7)
Outer circle: 3mm-500mm ± 0.1mm
Radius of curvature: ± 1mm - ± 50000mm ± 1%
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: 60/40 (we can process to 10-5 with high precision)
Effective caliber: ≥90%
Coating:Maultilayer Antireflective Coating
A:350-650nm
B:650-1050nm
C:1050-1580nm
Spectral Curve

 


 
Stock Sizes

 

Diameter
(mm)
Focal Length
(mm)
Back Focal Length (mm)R1=R2
(mm)
Center Thickness
(mm)
Edge Thickness (mm)Coating
(customizable)
12.7-25 -26.172.54.1No400-700nm650-1100nm1000-1650nm
12.7-30 -31.413.04.3
12.7-50 -52.103.54.3
25.4-50 -52.013.06.1
25.4-75 -77.863.55.6
25.4-100 -103.69405.6
 
Note

The above parameters are for reference only. For detailed Plano convex lens parameters, please consult our online customer service personnel or call our company.

In addition, We can customize the optical Plano concave lens according to customer requirements or drawings.



Spectral Curve
Spectral Curve
Spectral Curve


 
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