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SLB-25B-70NM 25.0 mm Dia. x -69.7 mm FL; Coated; Double-Concave Lens 400-700nm

SLB-25B-70NM 25.0 mm Dia. x -69.7 mm FL; Coated; Double-Concave Lens 400-700nm

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

Properties

Shape
Circular
Diameter
25 mm
EFL
-69.7 mm
BFL
-70.3 mm
R1
-72.66 mm
R2
72.66 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-25B-70NM 25.0 mm Dia. x -69.7 mm FL; Coated; Double-Concave Lens 400-700nm

The SLB-25B-70NM is a high-quality double-concave lens, designed and manufactured by OptoSigma. This lens, with a base shape of a circle, is specifically engineered for use within the wavelength range of 400-700nm, making it suitable for a wide range of optical applications.

The lens boasts a diameter of 25.0 mm and a center thickness of 2.0 mm, ensuring a compact and efficient design. The edge thickness is 4.2 mm, providing robustness and durability. The effective focal length (EFL) of this lens is -69.7 mm, and the back focal length (BFL) is -70.3 mm, indicating a strong converging capability.

The lens is made from n-BK7 Schott, a renowned optical glass known for its excellent optical properties. The double-concave geometry, with radii of curvature R1 (-72.66 mm) and R2 (72.66 mm), contributes to the lens's high-performance characteristics.

The SLB-25B-70NM is coated with Opt M on both the front and back surfaces, enhancing its overall light transmission and durability. This coating ensures high transmission and low reflection, making it an ideal choice for various optical systems.

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