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37-423 20mm Dia. N-SF6 Precision Aspheric Lens; EFL=12.5mm; NA=0.8 Uncoated

37-423 20mm Dia. N-SF6 Precision Aspheric Lens; EFL=12.5mm; NA=0.8 Uncoated

Type
Lens
Subtype
Aspheric Lens
Brand
Edmund Optics
Product webpage
Edmund Optics products in the 3DOptix catalog

Properties

Shape
Circular
Diameter
20 mm
EFL
12.5 mm
BFL
6.68 mm
R1
10.07 mm
R2

Material

Name
N-SF6
Dispersion Equation
Sellmeier
n (λ)
1.8051741184501493
λ
587.6 nm
B1
1.77931763
C1
0.0133714182 μm2
B2
0.338149866
C2
0.0617533621 μm2
B3
2.08734474
C3
174.01759 μm2

37-423 20mm Dia. N-SF6 Precision Aspheric Lens; EFL=12.5mm; NA=0.8 Uncoated

This is the 37-423 model from Edmund Optics, a high-precision aspheric lens with a 20mm diameter and a numerical aperture of 0.8. The lens is made from N-SF6 Schott, a high-refractive index glass, and is uncoated.

The lens has an effective focal length (EFL) of 12.5mm, making it suitable for applications that require a short focal length. The inner radius of the lens is 0, while the outer radius is also 0, indicating a symmetrical design. The lens has a thickness of 5.01mm at the edge and 10.5mm at the center.

The aspheric design of the lens is defined by its radius of curvature (r1) of 10.065mm and a conic constant (k1) of -1.206658. The lens has no secondary radius of curvature (r2), indicating a single curvature surface. The lens's back focal length (BFL) is 6.68mm.

The lens is designed to operate at a wavelength of 587.6nm. It is important to note that the lens is uncoated, which may affect its performance in high-intensity light applications or where low reflectivity is required.

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