48-685 12.0mm Dia. x -15 FL; MgF2 Coated; Plano-Concave Lens 400-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 12 mm
- EFL
- -15 mm
- BFL
- -16.68 mm
- R1
- -11.77 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
48-685 12.0mm Dia. x -15 FL; MgF2 Coated; Plano-Concave Lens 400-700nm
The 48-685 is a plano-concave lens with a diameter of 12.0mm, a focal length of -15, and a central thickness of 3.0mm. The edge thickness measures 4.47mm. This lens is sourced from Edmund Optics and is currently in stock. It is designed for use within the wavelength range of 400-700nm, with a peak wavelength of 587.6nm.
The lens is made from n-SF11 Schott, a high-index glass with excellent transmittance in the visible spectrum. It features a spherical geometry, with an inner radius of 0mm and an outer radius of 0mm. The front and back surfaces of the lens are coated with EDM MgF2 std curve, a broadband anti-reflection coating that reduces surface reflections and increases transmission.
This lens is a type of spherical lens, specifically a plano-concave lens, which means it has one flat surface and one curved surface that is concave. This design is often used to diverge or spread out light, making it suitable for a variety of applications in imaging, illumination, and beam shaping.