23-023 50mm Dia. N-SF6 Precision Aspheric Lens; EFL=50mm; NA=0.5 SWIR-Plus 900-1700nm
- Type
- Lens
- Subtype
- Aspheric Lens
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 50 mm
- EFL
- 50 mm
- BFL
- 42.77 mm
- R1
- 40.26 mm
- R2
Material
- Name
- N-SF6
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.8051741184501493
- λ
- 587.6 nm
- B1
- 1.77931763
- C1
- 0.0133714182 μm2
- B2
- 0.338149866
- C2
- 0.0617533621 μm2
- B3
- 2.08734474
- C3
- 174.01759 μm2
23-023 50mm Dia. N-SF6 Precision Aspheric Lens; EFL=50mm; NA=0.5 SWIR-Plus 900-1700nm
This is the 23-023 model from Edmund Optics, a high-precision aspheric lens with a 50mm diameter and a numerical aperture (NA) of 0.5. The lens is designed for use in the shortwave infrared (SWIR) region, specifically between 900 and 1700nm.
The lens is made from N-SF6 Schott, a high-refractive index glass that is often used in optical systems due to its excellent transmission properties in the infrared region. The aspheric design of the lens helps to reduce spherical aberration, improving the overall image quality.
The lens has an effective focal length (EFL) of 50mm, which is the distance from the lens's principal point to the image plane when the lens is focused at infinity. The back focal length (BFL) is 42.77mm, which is the distance from the rear surface of the lens to the image plane when the lens is focused at infinity.
The lens is coated with Edmund Optics' SWIR-Plus coating, which is designed to enhance the lens's performance in the SWIR region. This coating reduces surface reflections, improving the transmission of light through the lens and reducing the likelihood of flare and ghosting.
The lens has a center thickness of 13.06mm and an edge thickness of 5.08mm. The front and back surfaces of the lens are coated with the same SWIR-Plus coating.
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