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See all 13 Products in Family

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

20mm Dia. x -20mm FL, MgF₂ Coated, Double-Concave Lens

Stock #32-991

€31.50 Other Coating Options

Qty 1-9
€31.50

Qty 10
€28.50

Volume Pricing
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Code V Curves eDrawings: eprt IGES ISO PDF Drawings STEP: stp Zemax: zar Zemax: zmx

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Diameter (mm):

20.00 +0.0/-0.025

Effective Focal Length EFL (mm):

-20.00

Back Focal Length BFL (mm):

-20.55

Coating:

MgF₂ (400-700nm)

Coating Specification:

R_avg ≤1.75% @ 400 - 700nm

Substrate:

N-SF11

Surface Quality:

40-20

Power (P-V) @ 632.8nm:

1.5λ

Irregularity (P-V) @ 632.8nm:

λ/4

Clear Aperture CA (mm):

19.0

Center Thickness CT (mm):

2.00

Center Thickness Tolerance (mm):

±0.10

Centering (arcmin):

Bevel:

Protective bevel as needed

Edge Thickness ET (mm):

5.03

f/#:

1.00

Focal Length Specification Wavelength (nm):

587.6

Focal Length Tolerance (%):

±1

Numerical Aperture NA:

0.50

Radius R₁=-R₂ (mm):

-31.82

Type:

Double-Concave Lens

Typical Energy Density Limit:

10 J/cm² @ 532nm, 10ns

Wavelength Range (nm):

400 - 700

Regulatory Compliance

RoHS 2015:

Compliant

REACH 201:

Compliant

Product Family Description

AR Coated to Provide <1.75% Reflectance per Surface for 400 - 700nm
Designed for 0° Angle of Incidence
Various Coating Options: Uncoated, VIS 0°, VIS-NIR, NIR I, and NIR II

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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Call Now! +44 (0)1904 788600

Edmund Optics GmbH Germany acts as an agent for Edmund Optics Ltd. UK.
The contract partner is Edmund Optics Ltd. UK. Products are shipped from the UK.

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