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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
9mm Dia. x -18mm FL, NIR II, Inked, Double-Concave Lens

Stock #68-010-INK
€44,00
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Cant. 1-9
€44,00
Cant. 10
€39,60
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Diameter (mm):
9.00 ±0.025
Effective Focal Length EFL (mm):
-18.00
Back Focal Length BFL (mm):
-18.49
Coating:
NIR II (750-1550nm)
Coating Specification:
Rabs ≤1.5% @ 750 - 800nm
Rabs ≤1.0% @ 800 - 1550nm
Ravg ≤0.7% @ 750 - 1550nm
Substrate:
Surface Quality:
40-20
Power (P-V) @ 632.8nm:
1.5λ
Irregularity (P-V) @ 632.8nm:
λ/4
Clear Aperture CA (mm):
8.10
Center Thickness CT (mm):
1.50
Center Thickness Tolerance (mm):
±0.05
Centering (arcmin):
<1
Edge Thickness ET (mm):
2.45
f/#:
2.00
Focal Length Specification Wavelength (nm):
587.6
Focal Length Tolerance (%):
±1.00
Numerical Aperture NA:
0.25
Radius R1=-R2 (mm):
-18.86
Type:
Double-Concave Lens
Typical Energy Density Limit:
8 J/cm2 @ 1064nm, 10ns
Wavelength Range (nm):
750 - 1550

Regulatory Compliance

Product Family Description

  • AR Coated to Provide <0.7% Reflectance per Surface for 750 - 1550nm
  • Double-Concave Lenses Have Two Inward Curved Surfaces and a Negative Focal Length
  • Used for Image Reduction and to Spread Light
  • Various Coating Options: Uncoated, MgF2, VIS 0°, VIS-NIR, and NIR I

Double-Concave (DCV) Lenses have two inward curved surfaces and a negative focal length. They are used for image reduction and to spread light.

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