LB1901-A N-BK7 Bi-Convex Lens; Dia:1 in; f=75.0 mm ARC 350-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- 75 mm
- BFL
- 73.6 mm
- R1
- 76.6 mm
- R2
- -76.6 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
LB1901-A N-BK7 Bi-Convex Lens; Dia:1 in; f=75.0 mm ARC 350-700nm
The LB1901-A is a high-quality bi-convex lens, designed and manufactured by Thorlabs, a leading global supplier of photonics equipment. This lens, constructed from the renowned N-BK7 glass by Schott, is a spherical lens with a convex-convex base shape and a circular geometry.
The lens boasts a diameter of 1 inch (25.4 mm) and a thickness at the edge of 2 mm, while the center thickness measures 4.1 mm. The effective focal length (EFL) is 75 mm, and the back focal length (BFL) is 73.6 mm. The radii of curvature for the first and second surfaces are 76.6 mm and -76.6 mm, respectively. The inner and outer radii are both 0 mm.
The LB1901-A is coated with a broadband anti-reflection coating (ARC) that is optimized for the 350-700 nm wavelength range. This coating significantly reduces surface reflections, thereby enhancing the overall transmission of the lens. The lens is currently in stock and available for immediate shipping.
