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TECHSPEC^® components are designed, specified, or manufactured by Edmund Optics. Learn More

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

Name: 9mm Dia. x -9mm FL, VIS-NIR, Inked, Double-Concave Lens
Brand: TECHSPEC
SKU: 48-348-INK
Price: ₹4,524

Stock #48-348-INK 17 to 22 D=days

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₹4,524

Qty 1-9
₹4,524

Qty 10+
₹4,067

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Diameter (mm):

9.00

Effective Focal Length EFL (mm):

-9.00

N-SF11

f/#:

1.00

Numerical Aperture NA:

0.50

Coating:

VIS-NIR (400-1000nm)

Type:

Double-Concave Lens

Wavelength Range (nm):

400 - 1000

Back Focal Length BFL (mm):

-9.61

Bevel:

Protective bevel as needed

Center Thickness CT (mm):

2.25

Center Thickness Tolerance (mm):

±0.05

Centering (arcmin):

Clear Aperture CA (mm):

8.1

Coating Specification:

R_abs ≤0.25% @ 880nm
R_avg ≤1.25% @ 400 - 870nm
R_avg ≤1.25% @ 890 - 1000nm

Edge Thickness ET (mm):

3.48

Focal Length Tolerance (%):

±1

Radius R₁=-R₂ (mm):

-14.60

Surface Quality:

40-20

Regulatory Compliance

RoHS:

Compliant

Certificate of Conformance:

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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.