67-645 20mm Dia. x 60mm FL; NIR II Coated; Double-Convex Lens NIR II 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- 60 mm
- BFL
- 58.67 mm
- R1
- 61.33 mm
- R2
- -61.33 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
67-645 20mm Dia. x 60mm FL; NIR II Coated; Double-Convex Lens NIR II 750-1550nm
This is a 20mm diameter, double-convex lens with a focal length of 60mm, specifically designed for use in the near-infrared (NIR) spectrum. The lens is sourced from Edmund Optics, a reputable vendor known for their high-quality optical components.
The lens is made from n-BK7 Schott, a popular optical glass due to its excellent optical properties and high Abbe number. This material is particularly suitable for use in the NIR spectrum, ensuring high transmittance and minimal absorption in this wavelength range.
The lens features a double-convex geometry, with radii of curvature of 61.33mm for both the front and back surfaces. This geometry provides a large numerical aperture, making it ideal for applications requiring high light-gathering capability. The lens has an edge thickness of 2.36mm and a center thickness of 4mm, providing robustness and resistance to damage.
The lens is coated with Edmund Optics' standard NIR-II coating on both the front and back surfaces. This coating is designed to enhance the lens' performance in the NIR spectrum, reducing reflection and increasing transmission. The coating covers the wavelength range of 750-1550nm, making it suitable for a wide range of NIR applications.