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89-171 20mm Dia. x 40mm FL; VIS-EXT Coated; Double-Convex Lens VIS-EXT 350-700nm

89-171 20mm Dia. x 40mm 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
40 mm
BFL
38.44 mm
R1
40.67 mm
R2
-40.67 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

89-171 20mm Dia. x 40mm FL; VIS-EXT Coated; Double-Convex Lens VIS-EXT 350-700nm

The 89-171 is a high-quality double-convex lens, boasting a 20mm diameter and a focal length of 40mm. This lens is sourced from the reputable vendor, Edmund Optics, and is available in stock for immediate use. The lens is designed for use within the visible light spectrum, specifically between 350-700nm, making it suitable for a wide range of optical applications.

The lens is constructed from Schott's n-BK7 glass, a popular choice due to its excellent optical properties and versatility. The lens features a front and back coating of EDM VIS-EXT, which is designed to enhance the lens's performance within the visible light spectrum. This coating aids in reducing surface reflections and increasing transmission, thereby improving the overall efficiency and quality of the optical system.

The lens's geometry is characterized by its double-convex shape, with a center thickness of 5.3mm and an edge thickness of 2.8mm. The inner and outer radii are 0mm, and the lens has a base shape of a circle. The effective focal length (EFL) is 40mm, and the back focal length (BFL) is 38.44mm.

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