47-915 12mm Dia. x -12mm FL; VIS 0deg Coated; Double-Concave Lens 425-675nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 12 mm
- EFL
- -12 mm
- BFL
- -12.81 mm
- R1
- -19.47 mm
- R2
- 19.47 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
47-915 12mm Dia. x -12mm FL; VIS 0deg Coated; Double-Concave Lens 425-675nm
The 47-915 is a double-concave spherical lens, 12mm in diameter and featuring a focal length of -12mm. This lens, sourced from Edmund Optics, is designed for use within the visible light spectrum, specifically between 425-675nm. The lens's geometry includes an edge thickness of 4.71mm and a center thickness of 3mm, with an effective focal length (EFL) of -12mm. The radii of curvature for the front and back surfaces are -19.47mm and 19.47mm, respectively, and the back focal length (BFL) is -12.81mm.
The lens is made from n-SF11 Schott, a high-index glass with excellent transmittance in the visible spectrum. It features a standard visible coating on both the front and back surfaces, following the VIS 0° curve, which is designed to reduce surface reflections and improve overall transmission.
This lens is a versatile option for applications that require a concave-concave lens shape within the visible light spectrum. Its high-quality construction and precise specifications make it a reliable choice for various optical systems.
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