AL72512-E3 25.4 mm Dia. ZnSe AR coated Aspheric Lenses; EFL=12.7mm; NA=0.67 7-12µm
- Type
- Lens
- Subtype
- Aspheric Lens
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- 12.7 mm
- R1
- 17.8 mm
- R2
Material
- Name
- ZnSe
- Dispersion Equation
- Sellmeier
- n (λ)
- 2.402780893783937
- λ
- 10600 nm
- B1
- 4.45813734
- C1
- 0.040344681 μm2
- B2
- 0.467216334
- C2
- 0.15317139 μm2
- B3
- 2.8956629
- C3
- 2221.822369 μm2
AL72512-E3 25.4 mm Dia. ZnSe AR coated Aspheric Lenses; EFL=12.7mm; NA=0.67 7-12µm
The AL72512-E3 is a high-quality aspheric lens from Thorlabs, designed for use in the 7-12µm wavelength range. This lens is made from ZnSe (Zinc Selenide) material, specifically the ZnSe CONNOLLY variant, which is known for its excellent optical properties and durability.
The lens has a diameter of 25.4mm and a thickness of 2mm at the edge, with a center thickness of 6.2mm. The effective focal length (EFL) of this lens is 12.7mm, making it suitable for a wide range of optical applications. The lens features an NA (Numerical Aperture) of 0.67, which is a measure of the light-gathering ability of the lens.
The lens is coated with Thorlabs' E3 BBAR 8 AOI coating on both the front and back surfaces. This coating is designed to reduce reflection and increase transmission, enhancing the performance of the lens in its intended wavelength range.
The lens geometry is defined by several parameters, including the inner and outer radii, which are both 0 in this case. The lens also features a conic constant of -1, and aspheric coefficients up to the 16th order. These parameters contribute to the lens's excellent optical performance.
