LC1715-B N-BK7 Plano-Concave Lens; Dia:1 in; f=-50.0 mm ARC 650-1050nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- -50 mm
- BFL
- -52.3 mm
- R1
- -25.7 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
LC1715-B N-BK7 Plano-Concave Lens; Dia:1 in; f=-50.0 mm ARC 650-1050nm
The LC1715-B is a plano-concave lens made from N-BK7 Schott glass, a popular choice for its high refractive index and low dispersion. This lens, sourced from Thorlabs, is designed for use in the visible spectrum, specifically at a wavelength of 587.6nm. The plano-concave design, characterized by a flat front surface and a concave rear surface, is ideal for applications requiring a reduction in beam diameter or a decrease in beam divergence.
The lens has a diameter of 1 inch (25.4mm) and a thickness of 6.9mm at the edge, tapering to 3.5mm at the center. The effective focal length (EFL) is -50mm, indicating a diverging lens. The front and back surfaces are coated with a broadband anti-reflection coating (ARC), specifically designed for the 650-1050nm range, which reduces surface reflections and increases transmission.
The LC1715-B is a spherical lens, meaning it has a constant radius of curvature. The radius of curvature for the concave surface is -25.7mm, and the back focal length (BFL) is -52.3mm. The lens is designed to be used in a mount, and the inner and outer radii are not applicable in this case.
