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89-608 25mm Dia. Germanium Infrared Aspheric Lens; EFL=15mm; NA=0.83 BBAR 3-12µm

89-608 25mm Dia. Germanium Infrared Aspheric Lens; EFL=15mm; NA=0.83 BBAR 3-12µm

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

Properties

Shape
Circular
Diameter
25 mm
EFL
15 mm
BFL
14 mm
R1
45.37 mm
R2

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

89-608 25mm Dia. Germanium Infrared Aspheric Lens; EFL=15mm; NA=0.83 BBAR 3-12µm

This is the 89-608 model from Edmund Optics, a 25mm diameter Germanium Aspheric Lens, specifically designed for infrared applications with a wavelength of 4000µm. The lens boasts an effective focal length (EFL) of 15mm and a numerical aperture (NA) of 0.83, making it a high-performance component in its class.

The lens is made from Germanium burnett, a material known for its excellent transmission properties in the infrared spectrum. The aspheric design of the lens helps to reduce spherical aberration, a common issue in traditional lenses, thereby improving the overall image quality.

The lens features a broadband anti-reflection (BBAR) coating, which is applied to both the front and back surfaces. This coating enhances the lens's performance by reducing surface reflections, thereby increasing the amount of light transmitted through the lens. The BBAR coating is designed to work across a wide range of wavelengths, from 3µm to 12µm, making this lens highly versatile.

The geometry of the lens includes an inner radius of 0mm, an outer radius of 0mm, a thickness at the edge of 2.47mm, and a thickness at the center of 4mm. The front and back focal lengths are -1.0785422e-05mm and 1.1954471e-08mm respectively, and the lens has a conic constant of 0. The lens's shape is aspheric, which contributes to its high performance.

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