LB7639-E3 12.7 mm Dia. ZnSe Double-Convex Lens; EFL=20mm 7-12µm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 12.7 mm
- EFL
- 20 mm
- R1
- 55.3 mm
- R2
- -55.3 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
LB7639-E3 12.7 mm Dia. ZnSe Double-Convex Lens; EFL=20mm 7-12µm
The LB7639-E3 is a high-quality spherical lens from Thorlabs, designed for use in the mid-infrared spectrum with a wavelength of 10600 nm. This lens is constructed from ZnSe (Zinc Selenide) material, specifically the ZnSe CONNOLLY variant, which is known for its excellent transmission properties in the infrared region.
The lens features a double-convex geometry, with a diameter of 12.7 mm and a thickness of 2 mm at the edge, increasing to 2.7 mm at the center. The effective focal length (EFL) of this lens is 20 mm, making it suitable for a variety of optical applications. The radii of curvature for the first and second surfaces are 55.3 mm and -55.3 mm, respectively.
The LB7639-E3 is coated with the THo E3ZnSeARC7000120 coating on both the front and back surfaces. This anti-reflection coating is designed to improve the lens's transmission characteristics, reducing unwanted reflections and increasing the overall efficiency of the optical system.
This lens is currently in stock and available for immediate purchase from the Thorlabs website. The provided weblink leads directly to the product page for easy access and additional information.