LE1985-B 50.8 mm Dia. N-BK7 Positive Meniscus Lens; EFL=300mm 650-1050nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Concave)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 50.8 mm
- EFL
- 300 mm
- BFL
- 293.8 mm
- R1
- 100.1 mm
- R2
- 279.1 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
LE1985-B 50.8 mm Dia. N-BK7 Positive Meniscus Lens; EFL=300mm 650-1050nm
The LE1985-B is a 50.8 mm diameter Spherical Lens with a Positive Meniscus shape, sourced from the reputable vendor Thorlabs. This lens is designed for use within the wavelength range of 650-1050nm, making it suitable for a variety of optical applications.
The lens features a Base Shape of Circular geometry, with a diameter of 50.8 mm. The thickness at the edge of the lens is 3 mm, while the center thickness is 5.1 mm. The Effective Focal Length (EFL) of this lens is 300 mm, providing a significant degree of magnification.
The lens is made from N-BK7 Schott, a high-quality optical glass known for its excellent transparency and low auto-fluorescence. This material is widely used in the optical industry due to its superior optical properties.
The lens is coated with THo BBAR, a broadband anti-reflection coating, on both the front and back surfaces. This coating reduces reflection and increases transmission, enhancing the overall performance of the lens.
The lens's shape is Spherical, with radii of curvature R1 and R2 at 100.1 mm and 279.1 mm, respectively. The Back Focal Length (BFL) is 293.8 mm. The Inner and Outer Radius are both 0, indicating a uniform curvature.
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