LE1156-B 25.4 mm Dia. N-BK7 Positive Meniscus Lens; EFL=125mm 650-1050nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Concave)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- 125 mm
- BFL
- 121.2 mm
- R1
- 40.6 mm
- R2
- 106.9 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
LE1156-B 25.4 mm Dia. N-BK7 Positive Meniscus Lens; EFL=125mm 650-1050nm
The LE1156-B is a spherical lens with a base shape of a circle, sourced from the reputable vendor Thorlabs. This lens is a positive meniscus type, featuring a diameter of 25.4 mm and a thickness at the edge of 2 mm. The center thickness of the lens is 3.3 mm, and it has an effective focal length (EFL) of 125 mm. The lens is designed for use within the wavelength range of 650-1050 nm.
The lens's first radius of curvature (R1) is 40.6 mm, while the second radius (R2) is 106.9 mm. The back focal length (BFL) of the lens is 121.2 mm. The inner and outer radii are 0 mm each, indicating a uniform curvature.
The LE1156-B is made from N-BK7 Schott, a popular material for optical lenses due to its low dispersion and high Abbe number. This makes the lens suitable for a wide range of applications where high-quality imaging and minimal chromatic aberration are required.
The lens is coated with THo BBAR on both the front and back surfaces. This anti-reflection coating enhances the lens's performance by reducing surface reflections, thereby increasing transmission and improving image quality.
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