LD1357-C N-BK7 Bi-Concave Lens; Dia:12.7 mm; f=-50.0 mm ARC 1050-1700nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 12.7 mm
- EFL
- -50 mm
- BFL
- -51 mm
- R1
- -52.1 mm
- R2
- 52.1 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
LD1357-C N-BK7 Bi-Concave Lens; Dia:12.7 mm; f=-50.0 mm ARC 1050-1700nm
The LD1357-C is a high-quality bi-concave lens offered by Thorlabs, a leading vendor in the optical industry. This lens, designed with a spherical shape, is ideal for applications that require a negative focal length. The lens is fabricated from N-BK7, a popular glass type known for its excellent optical properties, making it suitable for a wide range of wavelengths.
The LD1357-C has a diameter of 12.7 mm and a thickness of 4.3 mm at the edge, tapering down to 3.5 mm at the center. The bi-concave design features radii of curvature of -52.1 mm for the first surface and 52.1 mm for the second surface, resulting in an effective focal length of -50 mm. The back focal length is -51 mm.
This lens is equipped with anti-reflection coatings on both the front and back surfaces, specifically designed for the ARC 1050-1700nm range. These coatings significantly reduce surface reflections, thereby enhancing the overall transmission of the lens.