87-994 50mm Dia. Germanium Infrared Aspheric Lens; EFL=50mm; NA=0.5 Uncoated
- Type
- Lens
- Subtype
- Aspheric Lens
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 50 mm
- EFL
- 50 mm
- BFL
- 45.92 mm
- R1
- 46.88 mm
- R2
- 62.38 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
87-994 50mm Dia. Germanium Infrared Aspheric Lens; EFL=50mm; NA=0.5 Uncoated
This is the 87-994 model from Edmund Optics, a 50mm diameter Germanium Infrared Aspheric Lens with an effective focal length of 50mm and a numerical aperture of 0.5, offered in an uncoated finish.
The lens is designed with a base shape of a circle, featuring a germanium burnett material. It is optimized for a wavelength of 4000nm. The geometry of the lens includes an inner radius of 0mm, an outer radius of 0mm, a thickness at the edge of 2.52mm, and a thickness at the center of 5.1mm. The lens's front surface has a radius of curvature of 46.88mm, while the second surface has a radius of curvature of 62.38mm. The back focal length of the lens is 45.92mm.
The lens's shape is aspheric, which is a type of lens surface that deviates from a simple sphere. This design allows for improved optical performance, particularly in terms of reducing spherical aberration. The uncoated finish of the lens means it does not have any additional layers to protect the surface or enhance its optical properties.
The item data provided does not include specific details about the coating of the lens. Therefore, we cannot provide information on this aspect. However, the lens's uncoated state ensures that it is free from any additional layers that could potentially affect its performance.
More Lens
