47-917 25mm Dia. x -25mm FL; VIS 0deg Coated; Double-Concave Lens 425-675nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- -25 mm
- BFL
- -25.69 mm
- R1
- -39.78 mm
- R2
- 39.78 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
47-917 25mm Dia. x -25mm FL; VIS 0deg Coated; Double-Concave Lens 425-675nm
The 47-917 is a high-quality spherical lens, boasting a concave-concave base shape and a circular design. This lens, sourced from the reputable vendor Edmund Optics, is a 25mm diameter by -25mm focal length model, specifically designed for the visible light spectrum with a 0-degree coating.
The lens's geometry is meticulously crafted, with an edge thickness of 6.05mm and a center thickness of 2.5mm. The effective focal length (EFL) is -25mm, while the first radius of curvature (R1) is -39.78mm and the second radius (R2) is 39.78mm. The back focal length (BFL) is -25.69mm. The lens's inner and outer radii are both zero, indicating a uniform curvature throughout.
The lens is made from the high-quality material n-sf11 Schott, a popular choice for its excellent optical properties. The coating on both the front and back is the standard edm vis-0 curve, designed for the visible light spectrum ranging from 425 to 675nm.