LB1258-B N-BK7 Bi-Convex Lens; Dia:0.5 in; f=30.0 mm ARC 650-1050nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 12.7 mm
- EFL
- 30 mm
- BFL
- 28.9 mm
- R1
- 30.4 mm
- R2
- -30.4 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5150823520020043
- λ
- 633 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
LB1258-B N-BK7 Bi-Convex Lens; Dia:0.5 in; f=30.0 mm ARC 650-1050nm
The LB1258-B is a high-quality bi-convex lens from Thorlabs, designed with a base shape of a circle and constructed from N-BK7 Schott glass. This lens is specifically engineered for use in the 650-1050nm wavelength range, making it suitable for a wide range of optical applications.
The lens features a diameter of 12.7mm and a thickness at the edge of 1.8mm, ensuring durability and stability. The center thickness is 3.1mm, and the effective focal length (EFL) is 30mm. The radii of curvature for the first and second surfaces are 30.4mm and -30.4mm, respectively, while the back focal length (BFL) is 28.9mm.
The LB1258-B is coated with Thorlabs' BBAR coating on both the front and back surfaces, which enhances its performance in the specified wavelength range. This coating reduces surface reflections, thereby improving transmission and overall system efficiency.
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