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48-700 9mm Dia. x -18mm FL; VIS-NIR Coated; Double-Concave Lens 400-1000nm

48-700 9mm Dia. x -18mm FL; VIS-NIR Coated; Double-Concave Lens 400-1000nm

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

Properties

Shape
Circular
Diameter
9 mm
EFL
-18 mm
BFL
-18.49 mm
R1
-18.86 mm
R2
18.86 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

48-700 9mm Dia. x -18mm FL; VIS-NIR Coated; Double-Concave Lens 400-1000nm

The 48-700 is a double-concave spherical lens with a 9mm diameter and a focal length of -18mm. This lens is sourced from Edmund Optics and is currently in stock. It is designed for use in the visible to near-infrared spectrum, with a wavelength of 587.6nm.

The lens is made from n-BK7 Schott, a popular optical glass known for its excellent optical properties and high transmittance in the visible spectrum. The lens features a double-concave geometry, with radii of curvature of -18.86mm and 18.86mm for the first and second surfaces, respectively. This geometry results in a back focal length of -18.49mm.

The lens has a center thickness of 1.5mm and an edge thickness of 2.45mm, providing robustness and durability. The lens is coated with a VIS-NIR coating, specifically the edm visnir0sp2002000 coating, on both the front and back surfaces. This coating enhances the lens's performance in the visible to near-infrared spectrum, improving its transmittance and reducing reflections.

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