LB1723-A N-BK7 Bi-Convex Lens; Dia:2 in; f=60.0 mm ARC 350-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 50.8 mm
- EFL
- 60 mm
- BFL
- 55 mm
- R1
- 59.3 mm
- R2
- -59.3 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
LB1723-A N-BK7 Bi-Convex Lens; Dia:2 in; f=60.0 mm ARC 350-700nm
The LB1723-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 optical glass from Schott, known for its excellent optical properties and versatility.
The lens features a diameter of 2 inches (50.8 mm) and a focal length of 60.0 mm, making it suitable for applications that require a long focal length. The bi-convex design, with radii of curvature of 59.3 mm for both surfaces, ensures a high level of optical performance.
The lens has a center thickness of 14.4 mm and an edge thickness of 3 mm, providing rigidity and durability. The effective focal length (EFL) is 60 mm, and the back focal length (BFL) is 55 mm. The lens does not have any inner or outer radius, indicating a uniform curvature across the surfaces.
The lens is coated with THo A Bbar on both the front and back surfaces, providing anti-reflection properties in the 350-700 nm range. This coating helps to minimize losses due to reflection, thereby improving the overall efficiency of the optical system.
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