45-020 20.0mm Dia. x -30 FL; Uncoated; Plano-Concave Lens
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- -30 mm
- BFL
- -31.96 mm
- R1
- -23.54 mm
Material
- Name
- N-SF11
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.7847141030246312
- λ
- 587.6 nm
- B1
- 1.73759695
- C1
- 0.013188707 μm2
- B2
- 0.313747346
- C2
- 0.0623068142 μm2
- B3
- 1.89878101
- C3
- 155.23629 μm2
45-020 20.0mm Dia. x -30 FL; Uncoated; Plano-Concave Lens
The 45-020 is a 20.0mm diameter Plano-Concave lens with a -30 FL (Focal Length) from Edmund Optics. This lens is uncoated and features a spherical geometry, designed for use in a wide range of optical applications.
The lens has a base shape of a circle, with a thickness of 5.39mm at the edge and 3.5mm at the center. The effective focal length (EFL) is -30, making it a concave lens. The first radius of curvature (R1) is -23.54, and the back focal length (BFL) is -31.96. The lens does not have an inner or outer radius, indicating a uniform curvature.
The lens is made from n-sf11 Schott, a high-index glass with excellent optical properties. It is designed to operate at a wavelength of 587.6nm. The lack of coating suggests that this lens is intended for use in applications where coating is not necessary or desirable, such as in certain laser systems or where minimal reflection is required.