eo_logo
 
Product added to cart
All Products / Optics / Optical Lenses / Achromatic Lenses / VIS-NIR Coated Achromatic Lenses
See all 280 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

6.25mm Dia. x 20mm FL, VIS-NIR, Inked, Achromatic 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 #49-306-INK 3-5 days
×
Other Coating Options
×
Quantity Selector - Use the plus and minus buttons to adjust the quantity. +
£69.70
Qty 1-5
£69.70
Qty 6+
£55.67
Volume Pricing
Request Quote
Prices shown are exclusive of VAT/local taxes
Get Product Downloads
Diameter (mm):
6.25 ±0.025
Effective Focal Length EFL (mm):
20.00
Focal Length Tolerance (%):
±1
Back Focal Length BFL (mm):
18.23
Focal Length Specification Wavelength (nm):
587.6
Clear Aperture CA (mm):
5.625
Centering (arcmin):
<1
Center Thickness CT (mm):
3.60 ±0.10
Center Thickness CT 1 (mm):
2.70 ±0.05
Center Thickness CT 2 (mm):
0.90 ±0.05
Radius R1 (mm):
12.30
Radius R2 (mm):
-8.71
Radius R3 (mm):
-24.98
Edge Thickness ET (mm):
3.00
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
N-BK7 / N-SF5
Surface Quality:
40-20
f/#:
3.2
Numerical Aperture NA:
0.16
Coating:
VIS-NIR (400-1000nm)
Coating Specification:
Rabs ≤0.25% @ 880nm
Ravg ≤1.25% @ 400 - 870nm
Ravg ≤1.25% @ 890 - 1000nm
Power (P-V) @ 632.8nm:
1.5λ
Irregularity (P-V) @ 632.8nm:
λ/4
Bevel:
Protective bevel as needed
Type:
Achromatic Lens
Wavelength Range (nm):
400 - 1000

Regulatory Compliance

RoHS 2015:
Compliant
×
REACH 201:
Compliant
×
Certificate of Conformance:
View
×

Product Family Description

  • Designed for 0° Angle of Incidence
  • Less Than 0.25% Reflectance Per Surface @ 880nm
  • MgF2 and VIS 0° Coated Achromats Also Available

TECHSPEC® VIS-NIR Coated Achromatic Lenses consist of two optical components cemented together to form an achromatic doublet. The doublet is computer optimized to correct for on-axis spherical and chromatic aberrations. TECHSPEC® VIS-NIR Coated Achromatic Lenses have visible/near-infrared broadband anti-reflection coating, which is specially optimized to yield maximum transmission (>99%) in the near-infrared. The achromatic lenses reduce reflection to less than 0.25 percent per surface at 880nm. Magnesium Fluoride coated and VIS 0° coated achromats are also available.