67-646 20mm Dia. x 80mm 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
- 80 mm
- BFL
- 78.67 mm
- R1
- 82 mm
- R2
- -82 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
67-646 20mm Dia. x 80mm FL; NIR II Coated; Double-Convex Lens NIR II 750-1550nm
This is a 20mm diameter, 80mm focal length double-convex lens, designed for use in the near-infrared (NIR) spectrum, specifically covering the 750-1550nm range. The lens is sourced from Edmund Optics, a leading provider of optical components.
The lens is made from n-BK7 Schott, a high-quality borosilicate glass known for its excellent optical properties and durability. The double-convex shape, with radii of curvature of 82mm on both sides, provides a high degree of focusing power and a relatively wide field of view.
The lens features a standard NIR II coating on both the front and back surfaces. This coating is designed to enhance transmission in the NIR spectrum, reducing reflection and improving overall system performance. The coating is specified as "edm nir-ii std curve", indicating a standardized coating design optimized for this specific wavelength range.
The lens has a thickness of 2.78mm at the edge and 4mm at the center. The back focal length is 78.67mm, providing a good balance between compactness and optical performance. The lens is circular in shape, with no inner or outer radius specified, indicating a uniform curvature across the entire diameter.