48-933 9mm Dia. x -12mm FL; Uncoated; Double-Concave Lens
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 9 mm
- EFL
- -12 mm
- BFL
- -12.41 mm
- R1
- -19.16 mm
- R2
- 19.16 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
48-933 9mm Dia. x -12mm FL; Uncoated; Double-Concave Lens
The 48-933 is a spherical lens with a base shape of a circle, sourced from the reputable vendor, Edmund Optics. This lens falls under the category of a Spherical Lens (Concave-Concave) and is uncoated. The lens has a diameter of 9mm and a focal length of -12mm, making it a double-concave lens.
The lens's geometry is meticulously designed with an edge thickness of 2.43mm and a center thickness of 1.5mm. The back focal length (BFL) is -12.41mm, and the effective focal length (EFL) is -12mm. The radii of curvature are -19.16mm for the first surface and 19.16mm for the second surface. The inner and outer radii are both 0mm, indicating a uniform curvature throughout the lens.
The lens is made of n-SF11 Schott material, a high-index glass often used in optical systems that require high performance. The material is optimized for a wavelength of 587.6nm. The lens is not coated, which means it does not have any anti-reflective or protective coatings. This may result in increased reflection and susceptibility to environmental damage, but it also means the lens is more cost-effective.