LA1258-A N-BK7 Plano-Convex Lens; Dia:1 in; f=2000.0 mm ARC 350-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- 2000 mm
- BFL
- 1998.6 mm
- R1
- 1033.6 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
LA1258-A N-BK7 Plano-Convex Lens; Dia:1 in; f=2000.0 mm ARC 350-700nm
The LA1258-A is a plano-convex lens made of N-BK7 glass, a popular material in the optical industry due to its excellent optical properties. This lens, sourced from Thorlabs, has a diameter of 1 inch (25.4 mm) and a focal length of 2000.0 mm, making it suitable for applications that require long focal lengths.
The lens's geometry includes a thickness of 2 mm at the edge and 2.1 mm at the center. The effective focal length (EFL) is 2000 mm, and the radius of curvature (R1) is 1033.6 mm. The back focal length (BFL) is 1998.6 mm, and both the inner and outer radii are 0.
The LA1258-A is coated with ARC 350-700nm on both the front and back surfaces. This anti-reflection coating reduces reflection losses and increases transmission in the spectral range of 350-700 nm. The lens's shape is spherical, a common choice for its ease of manufacturing and good imaging quality.