LF1822 25.4 mm Dia. N-BK7 Negative Meniscus Lens; EFL=-100mm Uncoated
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- -100 mm
- BFL
- -98.7 mm
- R1
- 100 mm
- R2
- 33.7 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
LF1822 25.4 mm Dia. N-BK7 Negative Meniscus Lens; EFL=-100mm Uncoated
The LF1822 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 at the edge of 4.7 mm, while the center thickness measures 3 mm. The effective focal length (EFL) is -100 mm, making it a negative meniscus lens.
The lens is made of n-BK7 Schott, a high-quality optical glass known for its excellent transparency and low auto-fluorescence. The radii of curvature for the first and second surfaces are 100 mm and 33.7 mm, respectively, resulting in a back focal length (BFL) of -98.7 mm. The lens does not come with any coating, as indicated by the empty 'coating' field in the item data.
This lens is designed to operate at a wavelength of 587.6 nm. The 'Inner Radius' and 'Outer Radius' fields are both 0, suggesting that this lens does not have any special features such as asphericity or aperture stops.
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