LB1199-C N-BK7 Bi-Convex Lens; Dia:2 in; f=200.0 mm ARC 1050-1700nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 50.8 mm
- EFL
- 100 mm
- BFL
- 198 mm
- R1
- 205 mm
- R2
- -205 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
LB1199-C N-BK7 Bi-Convex Lens; Dia:2 in; f=200.0 mm ARC 1050-1700nm
The LB1199-C is a high-quality bi-convex lens offered by Thorlabs, designed for use in the 1050-1700nm wavelength range. This lens is fabricated from N-BK7, a popular borosilicate crown glass known for its excellent optical properties, including a low coefficient of thermal expansion and high transmittance in the visible and near-infrared regions.
The lens boasts a diameter of 2 inches (50.8mm) and a focal length of 200.0mm, providing a beam waist (efl) of 100mm. The front and back surfaces of the lens are AR-coated (tho c bbar), ensuring high transmission and minimal reflection across the specified wavelength range.
The lens geometry is characterized by its base shape, which is circular, and its radii of curvature (r1 and r2) of 205mm and -205mm, respectively. The edge thickness of the lens is 3mm, while the center thickness is 11.8mm. The lens is designed for use in free space, with no inner or outer radius specified.