LE7495-F 25.4 mm Dia. ZnSe Positive Meniscus Lens; EFL=500mm 8-12µm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Concave)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- 500 mm
- BFL
- 492 mm
- R1
- 146.1 mm
- R2
- 181.6 mm
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
LE7495-F 25.4 mm Dia. ZnSe Positive Meniscus Lens; EFL=500mm 8-12µm
The LE7495-F is a high-quality spherical lens from Thorlabs, designed with a convex-concave shape and a circular base. This lens boasts a diameter of 25.4 mm and a thickness of 3.9 mm at the edge, with a center thickness of 4 mm. The effective focal length (EFL) of this lens is 500mm, making it suitable for a wide range of optical applications.
The lens is made from ZnSe (Zinc Selenide) material, specifically the connolly variant, which is known for its excellent optical properties. The ZnSe material is coated with AR (Anti-Reflective) coating on both the front and back surfaces, specifically designed for the 8-12 µm wavelength range. This coating helps to reduce surface reflections, thereby improving the overall transmission of the lens.
The inner and outer radii of the lens are 0, and the back focal length (BFL) is 492 mm. The lens is designed to be used in the 8-12 µm wavelength range, making it suitable for a variety of mid-infrared applications.
The LE7495-F is available from Thorlabs and is currently in stock, according to the vendor's website. This lens is a reliable and versatile choice for anyone in need of a high-quality, mid-infrared spherical lens.
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