LA1257-B N-BK7 Plano-Convex Lens; Dia:25.0 mm; f=75.0 mm ARC 650-1050nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 75 mm
- BFL
- 72.2 mm
- R1
- 38.6 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5150891983370924
- λ
- 632.8 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
LA1257-B N-BK7 Plano-Convex Lens; Dia:25.0 mm; f=75.0 mm ARC 650-1050nm
The LA1257-B is a plano-convex lens, a type of spherical lens, featuring a circular base shape and sourced from the reputable vendor, Thorlabs. This lens is designed for use within the wavelength range of 650-1050nm, with a central wavelength of 632.8nm, making it suitable for various applications within this spectrum.
The lens boasts a diameter of 25.0 mm and a thickness of 2.02 mm at the edge, while the center thickness measures 4.1 mm. The effective focal length (EFL) is 75.0 mm, and the radius of curvature (ROC) is 38.6 mm. The back focal length (BFL) is 72.2 mm, and the lens does not have an inner or outer radius.
The lens is crafted from the high-quality material N-BK7 Schott, a borosilicate crown glass known for its excellent optical properties. The lens features broadband anti-reflection (BBAR) coatings on both the front and back surfaces, denoted as 'tho b bbar'. These coatings help minimize surface reflections and maximize transmission within the specified wavelength range.
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