LA1725-A N-BK7 Plano-Convex Lens; Dia:2 in; f=400.0 mm ARC 350-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 50.8 mm
- EFL
- 400 mm
- BFL
- 395.7 mm
- R1
- 206 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
LA1725-A N-BK7 Plano-Convex Lens; Dia:2 in; f=400.0 mm ARC 350-700nm
The LA1725-A is a plano-convex lens, a type of spherical lens, manufactured by Thorlabs. This lens boasts a diameter of 2 inches, or 50.8 millimeters, and a focal length of 400 millimeters. The lens is made of N-BK7, a popular glass type in the optical industry, specifically from the Schott glass catalog.
The lens's geometry is characterized by its edge thickness of 3 millimeters and center thickness of 4.6 millimeters. The effective focal length (EFL) is 400 millimeters, and the radius of curvature (ROC) of the curved surface is 206 millimeters. The back focal length (BFL) is 395.7 millimeters, and both the inner and outer radii are 0 millimeters.
The LA1725-A is coated with a broadband anti-reflection coating (ARC), specifically designed for the 350-700 nanometer wavelength range. This coating helps reduce surface reflections, thereby increasing the amount of light transmitted through the lens.