67-604 6mm Dia. x 18mm 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
- 6 mm
- EFL
- 18 mm
- BFL
- 17.26 mm
- R1
- 18.22 mm
- R2
- -18.22 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
67-604 6mm Dia. x 18mm FL; NIR II Coated; Double-Convex Lens NIR II 750-1550nm
The 67-604 is a high-quality double-convex lens, designed and manufactured by Edmund Optics, a leading provider of optical components. This lens boasts a 6mm diameter and a focal length of 18mm, making it suitable for a wide range of applications.
The lens is constructed from n-BK7 Schott, a popular optical glass known for its excellent optical properties and versatility. The base shape of the lens is circular, and it features a standard spherical geometry. The center thickness of the lens is 2.2mm, while the edge thickness is 1.7mm, providing a robust and durable structure.
The 67-604 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 spectrum, specifically between 750nm and 1550nm, making it ideal for applications such as night vision, thermal imaging, and spectral analysis.
The lens has an effective focal length (EFL) of 18mm and a back focal length (BFL) of 17.26mm. The first radius of curvature (R1) is 18.22mm, and the second radius (R2) is -18.22mm, indicating a double-convex design. The inner and outer radii are both 0mm, suggesting a symmetrical lens design.