LB1811 N-BK7 Bi-Convex Lens; Dia:1 in; f=35.0 mm Uncoated
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- 35 mm
- BFL
- 32.7 mm
- R1
- 34.9 mm
- R2
- -34.9 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5167984379050088
- λ
- 587.6 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
LB1811 N-BK7 Bi-Convex Lens; Dia:1 in; f=35.0 mm Uncoated
The LB1811 N-BK7 Bi-Convex Lens is a high-quality optical component sourced from Thorlabs, a leading vendor in the field of precision photonics. This lens, with a diameter of 1 inch and a focal length of 35.0 mm, is designed for use in a wide range of optical systems, including imaging, beam shaping, and laser applications.
The lens is made from N-BK7, a type of borosilicate glass known for its excellent optical properties. This material is characterized by a high refractive index and low dispersion, making it ideal for applications that require high-precision optical performance. The lens is uncoated, meaning it does not have any additional layers applied to enhance its optical properties. However, uncoated lenses can still provide excellent performance in many applications, especially where high transmission and low reflectivity are not critical.
The geometry of the lens is carefully designed to provide optimal performance. It has a diameter of 25.4 mm, with a thickness of 2 mm at the edge and 6.8 mm at the center. The lens's effective focal length (EFL) is 35 mm, and its back focal length (BFL) is 32.7 mm. The lens's first and second radii of curvature are 34.9 mm and -34.9 mm, respectively. The lens's inner and outer radii are both 0 mm, indicating a uniform curvature across the lens's surface.
This lens is a spherical lens with a convex-convex shape, meaning it has a convex surface on both sides. This shape is often used in optical systems where a high degree of focusing is required. The lens's high quality and precision make it suitable for use in a wide range of applications, from simple imaging systems to complex laser setups.
In conclusion, the LB1811 N-BK7 Bi-Convex Lens is a versatile and high-performance optical component, ideal for a wide range of applications. Its uncoated design, high-quality N-BK7 glass, and precise geometry make it a reliable choice for any optical system that requires a high-performance lens with a focal length of 35.0 mm.