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89-177 25mm Dia. x 35mm FL; VIS-EXT Coated; Double-Convex Lens VIS-EXT 350-700nm

89-177 25mm Dia. x 35mm 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
25 mm
EFL
35 mm
BFL
32.81 mm
R1
35.09 mm
R2
-35.09 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

89-177 25mm Dia. x 35mm FL; VIS-EXT Coated; Double-Convex Lens VIS-EXT 350-700nm

The 89-177 is a high-quality double-convex lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a base shape of a circle, has a diameter of 25mm and a focal length of 35mm, making it suitable for a wide range of optical applications.

The lens is made from n-BK7 Schott, a popular optical glass known for its excellent transparency and low auto-fluorescence. The geometry of the lens includes an edge thickness of 2mm and a center thickness of 6.6mm, contributing to its robust construction. The effective focal length (EFL) is 35mm, and the radii of curvature are 35.09mm for the first surface and -35.09mm for the second surface. The back focal length (BFL) is 32.81mm.

The lens features a VIS-EXT coating on both the front and back surfaces, designed to enhance its performance in the visible spectrum, specifically between 350-700nm. This coating reduces surface reflections, improving transmission and overall image quality.

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