67-661 30mm 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
- 30 mm
- EFL
- 60 mm
- BFL
- 58.33 mm
- R1
- 61.15 mm
- R2
- -61.15 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
67-661 30mm Dia. x 60mm FL; NIR II Coated; Double-Convex Lens NIR II 750-1550nm
The 67-661 is a high-quality double-convex lens, designed and manufactured by Edmund Optics, a leading global provider of optical components. This lens boasts a 30mm diameter and a focal length of 60mm, making it suitable for a wide range of applications.
The lens is constructed from N-BK7 Schott glass, a popular material 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 61.15mm for the first surface and -61.15mm for the second surface. This geometry results in a high refractive power, making the lens ideal for imaging and light collection applications.
The lens has an edge thickness of 1.26mm and a center thickness of 5mm, providing robustness and durability. The effective focal length (EFL) is 60mm, and the back focal length (BFL) is 58.33mm. The lens does not have any inner or outer radius, indicating a uniform thickness across the lens.
The 67-661 lens is coated with Edmund Optics' NIR-II standard curve coating on both the front and back surfaces. This coating enhances the lens' performance in the near-infrared (NIR) spectrum, specifically between 750nm and 1550nm. The coating reduces surface reflections, improves transmission, and increases the overall efficiency of the lens.