45-891 25mm Dia. x 75mm FL; VIS-NIR Coated; Double-Convex Lens VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 75 mm
- BFL
- 73.84 mm
- R1
- 76.66 mm
- R2
- -76.66 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
45-891 25mm Dia. x 75mm FL; VIS-NIR Coated; Double-Convex Lens VIS-NIR 400-1000nm
The 45-891 is a high-quality double-convex lens, designed and manufactured by Edmund Optics, a leading global supplier of optical components. This lens boasts a 25mm diameter and a focal length of 75mm, making it suitable for a wide range of applications.
The lens is constructed from N-BK7 Schott, a popular optical glass due to its excellent optical properties and versatility. The base shape of the lens is circular, and it features a double-convex geometry, with radii of curvature of 76.66mm and -76.66mm for the first and second surfaces, respectively. This geometry results in a back focal length of 73.84mm.
The lens is coated with 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 regions of the spectrum, specifically between 400nm and 1000nm. The coating reduces reflection and increases transmission, thereby improving the overall efficiency and quality of the optical system in which the lens is used.
The lens has a thickness of 1.45mm at the edge and 3.5mm at the center. The inner and outer radii are 0mm, indicating that the lens is a simple double-convex lens without any additional features such as threads or mounts.