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LF5961-E 25.4 mm Dia. CaF2 Negative Meniscus Lens; EFL=-200mm 2-5µm

LF5961-E 25.4 mm Dia. CaF2 Negative Meniscus Lens; EFL=-200mm 2-5µm

Type
Lens
Subtype
Spherical Lens (Concave-Convex)
Brand
Thorlabs
Product webpage
Thorlabs products in the 3DOptix catalog

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.

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