AL72550-E1 25.4 mm Dia. ZnSe AR coated Aspheric Lenses; EFL=50 mm; NA=0.22 2-5µm
- Type
- Lens
- Subtype
- Aspheric Lens
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- 50 mm
- R1
- 71.66 mm
- R2
Material
- Name
- ZnSe
- Dispersion Equation
- Sellmeier
- n (λ)
- 2.43313289576804
- λ
- 4000 nm
- B1
- 4.45813734
- C1
- 0.040344681 μm2
- B2
- 0.467216334
- C2
- 0.15317139 μm2
- B3
- 2.8956629
- C3
- 2221.822369 μm2
AL72550-E1 25.4 mm Dia. ZnSe AR coated Aspheric Lenses; EFL=50 mm; NA=0.22 2-5µm
The AL72550-E1 is a high-quality aspheric lens, designed and manufactured by Thorlabs, a leading vendor in the optical industry. This lens is constructed from ZnSe (Zinc Selenide) material, specifically identified as "znse connolly" in the material ID. The lens is designed to operate at a wavelength of 4000 nanometers.
The lens features a circular base shape with a diameter of 25.4 millimeters. The edge thickness is 3.9 millimeters, while the center thickness is 5 millimeters. The effective focal length (EFL) of the lens is 50 millimeters, and it has a numerical aperture (NA) of 0.22.
The lens's geometry is defined by several radii and aspheric coefficients. The first radius (r1) is 71.66 millimeters, and the second radius (r2) is 0 millimeters. The lens has aspheric coefficients a2, a4, a6, and a8, all of which are set to 0, indicating a high degree of symmetry and precision in the lens's design.
The lens is coated with a front and back coating of "tho e1 bbar 8 aoi". This coating is designed to enhance the lens's performance by reducing reflections and increasing transmission, particularly in the infrared region of the spectrum.
