LF1141-B 25.4 mm Dia. N-BK7 Negative Meniscus Lens; EFL=-1000mm 650-1050nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- -1000 mm
- BFL
- -994.6 mm
- R1
- 500 mm
- R2
- 253.2 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5167984379050088
- λ
- 587.6 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
LF1141-B 25.4 mm Dia. N-BK7 Negative Meniscus Lens; EFL=-1000mm 650-1050nm
The LF1141-B 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 3.2 mm at the edge, tapering down to 3 mm at the center. The effective focal length (EFL) of this lens is -1000mm, making it a negative meniscus lens. The front and back surfaces of the lens are coated with THo BBAR, a broadband anti-reflection coating that enhances transmission in the 650-1050nm wavelength range.
The lens is made of N-BK7, a high-quality borosilicate glass commonly used in optical applications. The first radius of curvature (R1) is 500mm, while the second radius (R2) is 253.2mm. The back focal length (BFL) is -994.6mm, and the lens has no inner or outer radius.
This lens is available from Thorlabs, a leading global manufacturer of photonics equipment. According to the vendor's website, the lens is currently in stock, indicating its availability for immediate purchase and delivery. The item data also includes a weblink to the product page on Thorlabs' website for easy reference and further details.
