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AL2520-A 25 mm Dia. S-LAH64 High-Precision; CNC Polished Aspheric Lenses; EFL=20 mm; NA=0.54 AR 350-700nm

AL2520-A 25 mm Dia. S-LAH64 High-Precision; CNC Polished Aspheric Lenses; EFL=20 mm; NA=0.54 AR 350-700nm

Type
Lens
Subtype
Aspheric Lens
Brand
Thorlabs
Product webpage
Thorlabs products in the 3DOptix catalog

Properties

Shape
Circular
Diameter
25 mm
EFL
20 mm
R1
15.54 mm
R2

Material

Name
S-LAH64
Dispersion Equation
Sellmeier
n (λ)
1.7768959986651893
λ
780 nm
B1
1.83021453
C1
0.0090482329 μm2
B2
0.29156359
C2
0.0330756689 μm2
B3
1.28544024
C3
89.3675501 μm2

AL2520-A 25 mm Dia. S-LAH64 High-Precision; CNC Polished Aspheric Lenses; EFL=20 mm; NA=0.54 AR 350-700nm

The AL2520-A is a high-precision aspheric lens offered by Thorlabs, a leading vendor in the optical industry. This lens is characterized by its 25 mm diameter and is designed for use with a wavelength of 780 nm. The lens is made from S-LAH64, a high-quality material from Ohara, ensuring excellent optical performance.

The lens features an effective focal length (EFL) of 20 mm, making it suitable for a wide range of optical applications. It has a high numerical aperture (NA) of 0.54, which allows for a larger light-gathering capacity and improved resolution. The lens is also coated with an anti-reflective (AR) coating, specifically designed for the 350-700 nm range, which reduces surface reflections and increases transmission.

The AL2520-A is CNC polished, ensuring a high level of precision and surface quality. The lens has a center thickness of 7.6 mm and an edge thickness of 2.4 mm, providing structural rigidity and resistance to deformation. The lens's front and back surfaces are coated with the same AR coating, ensuring consistent performance across the entire optical path.

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