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SLB-50.8-250NIR2 50.8 mm Dia. x -250.0 mm FL; Coated; Plano-Concave Lens 750-1550nm

SLB-50.8-250NIR2 50.8 mm Dia. x -250.0 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
50.8 mm
EFL
-250 mm
BFL
-252 mm
R1
-129.75 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-50.8-250NIR2 50.8 mm Dia. x -250.0 mm FL; Coated; Plano-Concave Lens 750-1550nm

The SLB-50.8-250NIR2 is a Plano-Concave Spherical Lens, designed with a diameter of 50.8 mm and a focal length of -250.0 mm. This lens is sourced from OptoSigma, a renowned vendor in the optical industry. The lens is made of n-bk7 schott material, a high-quality glass known for its excellent optical properties.

The lens's geometry is meticulously crafted, with a thickness edge of 5.5 mm and a thickness center of 3 mm. The inner and outer radii are both zero, indicating a uniform curvature. The back focal length (bfl) is -252 mm, slightly longer than the effective focal length (efl) of -250 mm. This discrepancy is common in optical lenses and does not affect the lens's performance.

The lens is coated with opt ir2 on both the front and back surfaces, enhancing its performance in the 750-1550nm wavelength range. This coating is specifically designed for near-infrared applications, making this lens an ideal choice for such uses.

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