LF1141 25.4 mm Dia. N-BK7 Negative Meniscus Lens; EFL=-1000mm Uncoated
- 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 25.4 mm Dia. N-BK7 Negative Meniscus Lens; EFL=-1000mm Uncoated
The LF1141 is a spherical lens with a concave-convex base shape and a circular geometry, sourced from the reputable vendor Thorlabs. This lens 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 lens's first radius of curvature (r1) is 500 mm, while the second radius (r2) is 253.2 mm. The back focal length (bfl) is measured at -994.6 mm.
The lens is crafted from N-BK7, a popular glass type from Schott, which is known for its excellent optical properties. The wavelength for this lens is 587.6 nm. The lens does not come with any coating, as indicated in the item data.
Please note that the weblink provided leads to the product page on Thorlabs' website, and the link status indicates that the lens is currently in stock. This information is subject to change and should be verified on the vendor's website.
