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89-170 20mm Dia. x 30mm FL; VIS-EXT Coated; Double-Convex Lens VIS-EXT 350-700nm

89-170 20mm Dia. x 30mm FL; VIS-EXT Coated; Double-Convex Lens VIS-EXT 350-700nm

Type
Lens
Subtype
Spherical Lens (Convex-Convex)
Brand
Edmund Optics
Product webpage
Edmund Optics products in the 3DOptix catalog

Properties

Shape
Circular
Diameter
20 mm
EFL
30 mm
BFL
28.2 mm
R1
30.08 mm
R2
-30.08 mm

Material

Name
N-BK7
Dispersion Equation
Sellmeier
n (λ)
1.5167984379050088
λ
587.6 nm
B1
1.03961212
C1
0.00600069867 μm2
B2
0.231792344
C2
0.0200179144 μm2
B3
1.01046945
C3
103.560653 μm2

89-170 20mm Dia. x 30mm FL; VIS-EXT Coated; Double-Convex Lens VIS-EXT 350-700nm

The 89-170 is a Double-Convex Lens, a type of Spherical Lens, sourced from Edmund Optics. This lens, with a base shape of Circular, has a diameter of 20mm and a thickness of 1.88mm at the edge, while the center thickness measures 5.3mm. The effective focal length (EFL) of this lens is 30mm.

The lens's first radius of curvature (R1) is 30.08mm, and the second radius of curvature (R2) is -30.08mm, indicating its double-convex shape. The back focal length (BFL) is 28.2mm. The lens is made of n-BK7 Schott, a popular optical glass due to its excellent optical properties and relatively low cost.

The lens features VIS-EXT coating on both the front and back surfaces, designed for the visible spectrum (350-700nm). This coating enhances the lens's performance by reducing reflection and increasing transmission, thereby improving the overall system's efficiency.

Please note that the Inner and Outer Radius parameters are not specified in the provided data, indicating that these values are either not applicable or not provided by the vendor.

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