47-918 25mm Dia. x -50mm 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
- -50 mm
- BFL
- -50.82 mm
- R1
- -52.1 mm
- R2
- 52.1 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5167984379050088
- λ
- 587.6 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
47-918 25mm Dia. x -50mm FL; VIS 0deg Coated; Double-Concave Lens 425-675nm
The 47-918 is a Spherical Lens (Concave-Concave) type of optical component, sourced from the reputable vendor, Edmund Optics. This lens boasts a circular base shape and is primarily designed for use within the visible light spectrum, specifically centered around 587.6nm.
The 47-918 features a diameter of 25mm, with a center thickness of 2.5mm and an edge thickness of 5.4mm. The effective focal length (EFL) of this lens is -50mm, while the back focal length (BFL) measures -50.82mm. The first and second radii of curvature are -52.1mm and 52.1mm, respectively. The lens does not have any inner or outer radius specified.
This lens is made from the popular material, n-BK7 Schott, which is known for its excellent optical properties and versatility. The lens is coated with the EDM VIS-0 STD CURVE coating on both the front and back surfaces, which enhances its performance within the specified wavelength range of 425-675nm.