LA1908-AB 25.4 mm Dia. N-BK7 Plano-Convex Lens; EFL=500mm 400-1100nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- 500 mm
- R1
- 257.5 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
LA1908-AB 25.4 mm Dia. N-BK7 Plano-Convex Lens; EFL=500mm 400-1100nm
The LA1908-AB is a 25.4 mm diameter Plano-Convex lens made from N-BK7 Schott glass, sourced from Thorlabs. This lens is designed for use in the 400-1100nm wavelength range, making it suitable for a wide range of optical applications. The lens has a focal length (EFL) of 500mm, which is the distance from the lens's center to the point where light rays converge.
The lens's geometry includes a 2mm thickness at the edge and a 2.3mm thickness at the center. The front surface of the lens has a radius of curvature (R1) of 257.5mm, while the back surface has no curvature, as indicated by an inner radius of 0mm and an outer radius of 0mm. This asymmetrical design allows for precise control over the light path.
The LA1908-AB lens features anti-reflection coatings on both the front and back surfaces, specifically THo AB BAR coatings. These coatings are designed to reduce surface reflections and increase transmission, thereby improving overall system performance.
This lens is a Spherical lens, which means it has a spherical surface. Spherical lenses are the most common type of lens and are used in a wide variety of applications due to their simplicity and versatility.
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