LB1199-A N-BK7 Bi-Convex Lens; Dia:2 in; f=200.0 mm ARC 350-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 50.8 mm
- EFL
- 200 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-A N-BK7 Bi-Convex Lens; Dia:2 in; f=200.0 mm ARC 350-700nm
The LB1199-A is a high-quality bi-convex lens from Thorlabs, designed for use in a wide range of optical applications. This lens is made from N-BK7, a popular glass type known for its excellent optical properties, and is Schott-manufactured, ensuring a high level of quality and consistency.
The lens features a diameter of 2 inches (50.8 mm) and a focal length of 200.0 mm, making it suitable for use in systems where a long focal length is required. The lens has a double-convex shape, with radii of curvature of 205 mm on both sides. This shape helps to minimize spherical aberration, ensuring that the lens delivers high-quality, distortion-free images.
The lens has a thickness of 3 mm at the edge and 6.2 mm at the center, providing rigidity and durability. The effective focal length (EFL) of the lens is 200 mm, and the back focal length (BFL) is 198 mm. The lens does not have any inner or outer radius, indicating a uniform thickness across the lens.
The lens is coated with a broadband anti-reflection coating, designed to reduce reflection across the visible spectrum (350-700 nm). This coating helps to improve transmission, reducing losses and increasing the efficiency of the optical system.