48-700 9mm Dia. x -18mm FL; VIS-NIR Coated; Double-Concave Lens 400-1000nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 9 mm
- EFL
- -18 mm
- BFL
- -18.49 mm
- R1
- -18.86 mm
- R2
- 18.86 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
48-700 9mm Dia. x -18mm FL; VIS-NIR Coated; Double-Concave Lens 400-1000nm
The 48-700 is a double-concave spherical lens with a 9mm diameter and a focal length of -18mm. This lens is sourced from Edmund Optics and is currently in stock. It is designed for use in the visible to near-infrared spectrum, with a wavelength of 587.6nm.
The lens is made from n-BK7 Schott, a popular optical glass known for its excellent optical properties and high transmittance in the visible spectrum. The lens features a double-concave geometry, with radii of curvature of -18.86mm and 18.86mm for the first and second surfaces, respectively. This geometry results in a back focal length of -18.49mm.
The lens has a center thickness of 1.5mm and an edge thickness of 2.45mm, providing robustness and durability. The lens is coated with a VIS-NIR coating, specifically the edm visnir0sp2002000 coating, on both the front and back surfaces. This coating enhances the lens's performance in the visible to near-infrared spectrum, improving its transmittance and reducing reflections.
