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68-247 25mm Dia. Germanium Infrared Aspheric Lens; EFL=30mm; NA=0.42 BBAR 3-5µm

68-247 25mm Dia. Germanium Infrared Aspheric Lens; EFL=30mm; NA=0.42 BBAR 3-5µm

Type
Lens
Subtype
Aspheric Lens
Brand
Edmund Optics
Product webpage
Edmund Optics products in the 3DOptix catalog

Properties

Shape
Circular
Diameter
25 mm
EFL
30 mm
BFL
27.52 mm
R1
29.46 mm
R2
40 mm

Material

Name
Germanium
Dispersion Equation
Sellmeier
n (λ)
4.024720747638282
λ
4000 nm
B1
0.4886331
C1
1.393959 μm2
B2
14.5142535
C2
0.1626427 μm2
B3
0.0091224
C3
752.19 μm2

68-247 25mm Dia. Germanium Infrared Aspheric Lens; EFL=30mm; NA=0.42 BBAR 3-5µm

This is the 68-247 model from Edmund Optics, a 25mm diameter Germanium Aspheric Lens with an effective focal length of 30mm and a numerical aperture of 0.42. The lens is coated with BBAR 3-5µm, ensuring high-quality performance in the infrared spectrum.

The lens is designed with a base shape of a circle, featuring an inner radius of 0 and an outer radius of 0. The lens's thickness at the edge is 2.29mm, while its center thickness is 3.25mm. The first radius of curvature (r1) is 29.46mm, and the second radius of curvature (r2) is 40mm. The back focal length (bfl) is 27.52mm.

The lens's front and back are coated with "edm arcedgermanium35", providing excellent durability and performance. The lens's shape is aspheric, which helps to reduce spherical aberration and improve optical performance.

The lens is currently in stock and can be purchased directly from the Edmund Optics website using the provided weblink. The link has been verified and is valid as of the last update.

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