49-512 50mm Dia. x 250mm FL; NIR I Coated; Double-Convex Lens NIR I 600-1050nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 50 mm
- EFL
- 250 mm
- BFL
- 248.37 mm
- R1
- 257.57 mm
- R2
- -257.57 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5167984379050088
- λ
- 587.6 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
49-512 50mm Dia. x 250mm FL; NIR I Coated; Double-Convex Lens NIR I 600-1050nm
This is a 50mm diameter by 250mm focal length double-convex lens, specifically designed for use in the near-infrared (NIR) spectrum. The lens is sourced from Edmund Optics and is currently in stock. It is made from n-BK7 Schott, a popular optical glass known for its excellent transparency in the visible and near-infrared regions.
The lens features a standard NIR I coating on both the front and back surfaces, which enhances its performance in the 600-1050nm wavelength range. This coating is part of Edmund Optics' NIR I series, which provides high transmission and low reflectance in the NIR spectrum.
The geometry of the lens includes a thickness of 2.5mm at the edge and 4.93mm at the center. The front and back radii of curvature are 257.57mm and -257.57mm respectively, resulting in a back focal length of 248.37mm. The lens has a spherical shape, which is a common choice for its simplicity and wide range of applications.
