LF7321-F 25.4 mm Dia. ZnSe Negative Meniscus Lens; EFL=-200mm 8-12µm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- -200 mm
- BFL
- -191.9 mm
- R1
- 57.7 mm
- R2
- 45.9 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
LF7321-F 25.4 mm Dia. ZnSe Negative Meniscus Lens; EFL=-200mm 8-12µm
The LF7321-F is a spherical lens with a negative meniscus shape, sourced from Thorlabs. This lens is designed for use with a wavelength of 10600 nm and features a diameter of 25.4 mm. The lens has a center thickness of 4 mm and an edge thickness of 4.4 mm, providing a robust and durable structure.
The lens's effective focal length (EFL) is -200 mm, indicating that it is a diverging lens, which spreads out light rays that pass through it. This can be useful in a variety of optical applications where beam expansion is required. The lens's front and back surfaces are coated with tho znse-arced 8-12, which is specifically designed for use in the 8-12 µm spectral range, enhancing its performance in the infrared region.
The lens's inner and outer radii are 0, and its front and back radii are 57.7 mm and 45.9 mm, respectively. This specific curvature gives the lens its meniscus shape, which can be beneficial in certain optical systems. The lens is made of ZnSe (Zinc Selenide), a material known for its excellent optical properties, including high transparency in the infrared region.