89-179 25mm Dia. x 50mm FL; VIS-EXT Coated; Double-Convex Lens VIS-EXT 350-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 50 mm
- BFL
- 48.29 mm
- R1
- 50.8 mm
- R2
- -50.8 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
89-179 25mm Dia. x 50mm FL; VIS-EXT Coated; Double-Convex Lens VIS-EXT 350-700nm
The 89-179 is a high-quality double-convex lens, boasting a diameter of 25mm and a focal length of 50mm. This lens is sourced from the renowned optical vendor, Edmund Optics, and is available for immediate purchase, as indicated by its "in stock" status on the vendor's website.
The lens is constructed from Schott's n-BK7 glass, a popular material known for 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 50.8mm and -50.8mm for the first and second surfaces, respectively. This geometry results in a back focal length of 48.29mm and an effective focal length of 50mm.
The lens's edges have a thickness of 1.88mm, while the center is 5mm thick. The lens is coated with Edmund Optics' VIS-EXT coating on both the front and back surfaces, which enhances its performance in the visible spectrum, specifically within the 350-700nm range. This coating is designed to reduce reflection and increase transmission, thereby improving the overall image quality.
