89-612 25mm Dia. Germanium Infrared Aspheric Lens; EFL=40mm; NA=0.31 BBAR 3-12µm
- Type
- Lens
- Subtype
- Aspheric Lens
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 40 mm
- BFL
- 37.89 mm
- R1
- 44.05 mm
- R2
- 65.6 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
89-612 25mm Dia. Germanium Infrared Aspheric Lens; EFL=40mm; NA=0.31 BBAR 3-12µm
The 89-612 is a 25mm diameter Germanium Aspheric Lens, designed for use in the infrared spectrum with a wavelength of 4000µm. This lens boasts an effective focal length (EFL) of 40mm and a numerical aperture (NA) of 0.31, making it a versatile choice for a variety of applications.
The lens is made from Germanium burnett, a material known for its excellent transmission properties in the infrared range. It features a BBAR coating on both the front and back surfaces, which further enhances its performance by reducing surface reflections and increasing transmission.
The lens geometry includes a 2.38mm thickness at the edge, a 3.1mm thickness at the center, and a 37.89mm back focal length (BFL). The aspheric design of the lens helps to correct spherical aberration, a common issue in traditional spherical lenses, resulting in improved image quality and resolution.
The 89-612 is available from Edmund Optics and is currently in stock. For more information, including detailed specifications and purchasing options, please refer to the provided weblink.
