LF7785-F 25.4 mm Dia. ZnSe Negative Meniscus Lens; EFL=-100mm 8-12µm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- -100 mm
- BFL
- -91.8 mm
- R1
- 28.4 mm
- R2
- 21.6 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
LF7785-F 25.4 mm Dia. ZnSe Negative Meniscus Lens; EFL=-100mm 8-12µm
The LF7785-F is a spherical lens with a concave-convex base shape and a circular geometry. It has a diameter of 25.4 mm and a thickness of 5.1 mm at the edge, tapering down to 4 mm at the center. The effective focal length (EFL) of this lens is -100 mm, making it a negative meniscus lens. The front and back radii of curvature are 28.4 mm and 21.6 mm, respectively, resulting in a back focal length (BFL) of -91.8 mm.
This lens is made of ZnSe (Zinc Selenide) material, identified as "znse connolly" in the material ID. It is designed to operate at a wavelength of 10600 nm. The lens comes with anti-reflection coatings on both the front and back surfaces, specifically the THo ZnSe-ARCED 8-12 coating, which is optimized for the 8-12 µm spectral range.
The lens is sourced from Thorlabs, a reputable vendor in the optical industry. According to the vendor's website, the lens is currently in stock, ensuring quick delivery upon order. The detailed specifications, including the geometry, material, coating, and wavelength, make this lens a suitable choice for various optical applications.
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