LF5961-E 25.4 mm Dia. CaF2 Negative Meniscus Lens; EFL=-200mm 2-5µm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- -200 mm
- BFL
- -197.3 mm
- R1
- 86.2 mm
- R2
- 41.4 mm
Material
- Name
- CaF2
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.4096399504333625
- λ
- 4000 nm
- B1
- 0.5675888
- C1
- 0.00252643 μm2
- B2
- 0.4710914
- C2
- 0.010078333 μm2
- B3
- 3.8484723
- C3
- 1200.555973 μm2
LF5961-E 25.4 mm Dia. CaF2 Negative Meniscus Lens; EFL=-200mm 2-5µm
The LF5961-E is a spherical lens with a concave-convex base shape and a circular design, boasting a diameter of 25.4 mm. This lens is sourced from Thorlabs, a reputable vendor known for its high-quality optical components. The lens features a thickness of 5.1 mm at the edge and 4 mm at the center, making it a robust and durable choice for various applications.
The effective focal length (EFL) of the LF5961-E is -200 mm, indicating its concave nature. This negative meniscus lens is designed to refract light beams in a specific manner, making it suitable for use in systems where beam convergence is required. The back focal length (BFL) of the lens is -197.3 mm, further emphasizing its concave properties.
The lens is crafted from Calcium Fluoride (CaF2), a material with the material ID "caf2 mal-1963". This material is known for its excellent transparency across a wide spectrum, including the ultraviolet, visible, and infrared regions. The lens is coated with "tho ecaf2arc20005000" on both the front and back surfaces, enhancing its durability and performance.
The LF5961-E is designed to operate at a wavelength of 4000 nm. This makes it suitable for use in systems operating in the near-infrared region of the spectrum.