48-943 12mm 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
- 12 mm
- EFL
- -18 mm
- BFL
- -18.65 mm
- R1
- -18.94 mm
- R2
- 18.94 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
48-943 12mm Dia. x -18mm FL; VIS-NIR Coated; Double-Concave Lens 400-1000nm
The 48-943 is a double-concave spherical lens with a diameter of 12mm and a focal length of -18mm, making it a negatively powered lens. This lens is sourced from Edmund Optics, a reputable vendor in the optical industry. The lens is made from the material n-BK7 Schott, a common and high-quality optical glass.
The lens features a VIS-NIR coating, specifically the edm visnir0sp2002000 coating, on both the front and back surfaces. This coating is designed to enhance the lens's performance in the visible and near-infrared spectrum, which covers a wavelength range of 400-1000nm. This coating aids in reducing surface reflections and increasing transmission, thereby improving the overall efficiency and quality of the optical system in which the lens is used.
The lens has a central thickness of 2mm and an edge thickness of 3.76mm, providing a robust structure while maintaining a compact form factor. The inner and outer radii are 0, indicating a symmetrical curvature. The back focal length (BFL) is -18.65mm, a value that is slightly different from the focal length due to the lens's concave-concave geometry.