49-547 12mm Dia. x -18mm FL; NIR I Coated; Double-Concave Lens 600-1050nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 12 mm
- EFL
- -18 mm
- BFL
- -18.65 mm
- R1
- -18.94 mm
- R2
- 18.94 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
49-547 12mm Dia. x -18mm FL; NIR I Coated; Double-Concave Lens 600-1050nm
The 49-547 is a high-quality double-concave lens, 12mm in diameter and featuring a focal length of -18mm, sourced from the renowned optical vendor, Edmund Optics. This lens is designed for use within the near-infrared (NIR) spectrum, specifically between 600-1050nm, making it suitable for a wide range of applications within this wavelength range.
The lens is constructed from the high-grade material, N-BK7 Schott, which is well-known for its excellent optical properties and versatility. The base shape of the lens is circular, and it boasts a center thickness of 2mm and an edge thickness of 3.76mm, providing a robust and durable structure.
The 49-547 lens features a double-concave geometry, with radii of curvature of -18.94mm and 18.94mm for the front and back surfaces, respectively. This geometry results in a back focal length of -18.65mm, contributing to the lens's overall optical performance.
The lens is coated with the EDM NIR-I standard curve on both the front and back surfaces. This coating enhances the lens's performance within the NIR spectrum, improving transmission and reducing unwanted reflections. The coating also provides excellent environmental stability, ensuring the lens maintains its performance over time.