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SLB-20-70NIR2 20.0 mm Dia. x -70.0 mm FL; Coated; Plano-Concave Lens 750-1550nm

SLB-20-70NIR2 20.0 mm Dia. x -70.0 mm FL; Coated; Plano-Concave Lens 750-1550nm

Type
Lens
Subtype
Spherical Lens (Plano-Concave)
Brand
OptoSigma
Product webpage
OptoSigma products in the 3DOptix catalog

Properties

Shape
Circular
Diameter
20 mm
EFL
-70 mm
BFL
-71.3 mm
R1
-36.33 mm

Material

Name
N-BK7
Dispersion Equation
Sellmeier
n (λ)
1.518720636186463
λ
546.1 nm
B1
1.03961212
C1
0.00600069867 μm2
B2
0.231792344
C2
0.0200179144 μm2
B3
1.01046945
C3
103.560653 μm2

SLB-20-70NIR2 20.0 mm Dia. x -70.0 mm FL; Coated; Plano-Concave Lens 750-1550nm

The SLB-20-70NIR2 is a Plano-Concave Spherical Lens, sourced from the reputable vendor OptoSigma. This lens boasts a diameter of 20.0 mm and a focal length of -70.0 mm, making it suitable for a wide range of optical applications.

The lens is crafted from n-bk7 schott, a high-quality optical glass known for its excellent transmittance and homogeneity. The base shape of the lens is circular, and it features an inner radius of 0 mm and an outer radius of 0 mm.

The lens's geometry is defined by a thickness edge of 3.4 mm and a thickness center of 2 mm. The back focal length (bfl) is -71.3 mm, and the radius of curvature (r1) is -36.33 mm.

The SLB-20-70NIR2 is coated with opt ir2 on both the front and back, enhancing its performance in the 750-1550nm wavelength range. This coating ensures optimal light transmission and reduces surface reflections, making it an ideal choice for applications that require high-precision optical performance.

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