68-238 25mm Dia. Germanium Infrared Aspheric Lens; EFL=25mm; NA=0.5 Uncoated
- Type
- Lens
- Subtype
- Aspheric Lens
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 25 mm
- BFL
- 22.51 mm
- R1
- 26.93 mm
- R2
- 37.8 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
68-238 25mm Dia. Germanium Infrared Aspheric Lens; EFL=25mm; NA=0.5 Uncoated
This is a 25mm diameter germanium aspheric lens, catalog number 68-238, sourced from Edmund Optics. The lens is uncoated and designed for infrared applications with a wavelength of 4000nm. The lens features a base shape of a circle, with an inner radius of 0mm and an outer radius of 0mm. The lens has a thickness of 2.32mm at the edge and a center thickness of 3.45mm.
The effective focal length (EFL) of this lens is 25mm, and it has a numerical aperture (NA) of 0.5. The first radius of curvature (R1) is 26.93mm, and the second radius of curvature (R2) is 37.8mm. The back focal length (BFL) is 22.51mm. The lens does not have any coating, as indicated by the empty 'coating' parameter in the item data.
This lens is available for purchase from the Edmund Optics website, and the link provided in the item data indicates that it is currently in stock. The detailed specifications and availability make this lens a suitable choice for users looking for a high-quality, uncoated germanium aspheric lens for infrared applications.
More Lens
