LE1613-B 50.8 mm Dia. N-BK7 Positive Meniscus Lens; EFL=250mm 650-1050nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Concave)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 50.8 mm
- EFL
- 250 mm
- BFL
- 243.5 mm
- R1
- 82.5 mm
- R2
- 224.7 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
LE1613-B 50.8 mm Dia. N-BK7 Positive Meniscus Lens; EFL=250mm 650-1050nm
The LE1613-B is a spherical lens with a base shape of a circle, sourced from the reputable vendor Thorlabs. This positive meniscus lens, designed for use within the wavelength range of 650-1050nm, boasts a diameter of 50.8mm and an effective focal length (EFL) of 250mm.
The lens's geometry is intricately designed with an edge thickness of 2.9mm and a center thickness of 5.5mm. The first radius of curvature (R1) is 82.5mm, while the second radius (R2) measures 224.7mm. The back focal length (BFL) is 243.5mm, and both the inner and outer radii are 0mm.
The lens is crafted from N-BK7 Schott, a high-quality optical glass known for its excellent transmission properties and low auto-fluorescence. This material makes the LE1613-B suitable for various applications, including but not limited to, beam shaping, collimation, and imaging.
The lens features a broadband anti-reflection coating, denoted as 'tho b bbar' on both the front and back surfaces. This coating enhances the lens's performance by reducing surface reflections and increasing transmission, thereby minimizing losses and improving signal quality.