SLB-50.8B-250PIR2 50.8 mm Dia. x 251.0 mm FL; Coated; Double-Convex Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 50.8 mm
- EFL
- 251 mm
- BFL
- 249.1 mm
- R1
- 259.5 mm
- R2
- -259.5 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.518720636186463
- λ
- 546.1 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
SLB-50.8B-250PIR2 50.8 mm Dia. x 251.0 mm FL; Coated; Double-Convex Lens 750-1550nm
The SLB-50.8B-250PIR2 is a 50.8 mm diameter, double-convex lens with a focal length of 251.0 mm, specifically designed for use within the wavelength range of 750-1550nm. This lens is sourced from OptoSigma, a renowned vendor in the optical industry.
The lens is made from n-bk7 schott, a high-quality optical glass known for its excellent transmittance and homogeneity. The base shape of the lens is circular, and it features a spherical geometry with a center thickness of 5.4 mm and an edge thickness of 2.9 mm. The effective focal length (EFL) is 251.0 mm, and the back focal length (BFL) is 249.1 mm. The radii of curvature for the first and second surfaces are 259.5 mm and -259.5 mm, respectively.
The SLB-50.8B-250PIR2 is coated with Opt IR2, a proprietary coating developed by OptoSigma. This coating is applied to both the front and back surfaces of the lens, enhancing its performance within the specified wavelength range. The coating reduces surface reflections, improves transmission, and increases the lens's overall durability.
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