eo_logo
 
Product added to cart
All Products / Optics / Optical Lenses / Double-Concave (DCV) Lenses / VIS-NIR Coated Double-Concave (DCV) Lenses
See all 26 Products in Family
TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

9mm Dia. x -18mm FL, VIS-NIR, Inked, Double-Concave Lens

Any of our lenses with a diameter of 5mm or greater can be specified with blackened edges. To specify the blackening, simply append a –INK to the BBAR coated stock number.
×
Stock #48-700-INK Contact Us
×
Quantity Selector - Use the plus and minus buttons to adjust the quantity. +
£44.20
Qty 1-9
£44.20
Qty 10+
£39.74
Volume Pricing
Request Quote
Prices shown are exclusive of VAT/local taxes
Get Product Downloads
Diameter (mm):
9.00
Effective Focal Length EFL (mm):
-18.00
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
N-BK7
f/#:
2.00
Numerical Aperture NA:
0.25
Coating:
VIS-NIR (400-1000nm)
Type:
Double-Concave Lens
Wavelength Range (nm):
400 - 1000
Back Focal Length BFL (mm):
-18.49
Bevel:
Protective bevel as needed
Center Thickness CT (mm):
1.50
Center Thickness Tolerance (mm):
±0.05
Centering (arcmin):
<1
Clear Aperture CA (mm):
8.1
Coating Specification:
Rabs ≤0.25% @ 880nm
Ravg ≤1.25% @ 400 - 870nm
Ravg ≤1.25% @ 890 - 1000nm
Edge Thickness ET (mm):
2.45
Focal Length Tolerance (%):
±1
Radius R1=-R2 (mm):
-18.86
Surface Quality:
40-20

Regulatory Compliance

RoHS:
Compliant
×
Certificate of Conformance:
View
×

Product Family Description

  • AR Coated to Provide <1.25% Reflectance per Surface for 400 - 1000nm
  • <0.25% Reflectance @ 880nm
  • Designed for 0° Angle of Incidence
  • Various Coating Options: Uncoated, VIS-EXT, MgF2, VIS 0°, NIR I, and NIR II

TECHSPEC® VIS-NIR Coated Double-Concave (DCV) Lenses are designed to have two inward curved surfaces and a negative focal length similar to Plano-Concave (PCV) lenses. These lenses can be used for balancing aberrations created by other lenses within a system due to their negative spherical aberration. Double-Concave (DCV) lenses are commonly used in a variety of applications including image reduction, beam expansion and telescopes. TECHSPEC® VIS-NIR Coated Double-Concave (DCV) Lenses are optimized for transmission (>99%) in the near-infrared. These lenses are also available Uncoated, VIS-EXT, MgF2, VIS 0°, NIR I, or with NIR II AR coating options.