89-140 9mm Dia. x 36mm 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
- 9 mm
- EFL
- 36 mm
- BFL
- 35.15 mm
- R1
- 36.77 mm
- R2
- -36.77 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
89-140 9mm Dia. x 36mm FL; VIS-EXT Coated; Double-Convex Lens VIS-EXT 350-700nm
The 89-140 is a high-quality double-convex lens, sourced from the renowned optical vendor, Edmund Optics. This lens boasts a 9mm diameter and a focal length of 36mm, making it suitable for a wide range of optical applications. The lens is fabricated from the esteemed N-BK7 glass from Schott, a material known for its excellent optical properties and versatility.
The lens features a double-convex geometry, with radii of curvature of 36.77mm and -36.77mm for the first and second surfaces, respectively. This geometry results in a back focal length of 35.15mm and an effective focal length of 36mm. The lens has a central thickness of 2.55mm and an edge thickness of 2mm, providing robustness and durability.
The 89-140 lens is coated with the VIS-EXT coating on both the front and back surfaces. This coating is specifically designed for the visible spectrum, enhancing transmission within the 350-700nm range. The coating also provides excellent environmental resistance, ensuring the lens maintains its performance even in challenging conditions.