LD1613-B N-BK7 Bi-Concave Lens; Dia:25.4 mm; f=-100.0 mm ARC 650-1050nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- -100 mm
- BFL
- -101 mm
- R1
- -103.7 mm
- R2
- 103.7 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
LD1613-B N-BK7 Bi-Concave Lens; Dia:25.4 mm; f=-100.0 mm ARC 650-1050nm
The LD1613-B is a high-quality bi-concave lens from Thorlabs, designed with a base shape of a circle and a sub-type of spherical lens. This lens is constructed from N-BK7, a popular glass type from Schott, known for its excellent optical properties. The lens has a diameter of 25.4 mm and a thickness at the edge of 5.6 mm, while the center thickness is 4 mm.
The lens's effective focal length (EFL) is -100 mm, indicating its concave nature. The first radius of curvature (R1) is -103.7 mm, and the second radius of curvature (R2) is 103.7 mm, which contributes to its bi-concave shape. The back focal length (BFL) is -101 mm. The lens is designed to operate at a wavelength of 587.6 nm.
The lens features anti-reflection coatings on both the front and back surfaces, specifically THo BBAR coatings designed for the 650-1050 nm range. This coating helps to reduce surface reflections and increase transmission, making it suitable for various applications.