LB1450-B N-BK7 Bi-Convex Lens; Dia:0.5 in; f=20.0 mm ARC 650-1050nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 12.7 mm
- EFL
- 20 mm
- BFL
- 18.7 mm
- R1
- 19.9 mm
- R2
- -19.9 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
LB1450-B N-BK7 Bi-Convex Lens; Dia:0.5 in; f=20.0 mm ARC 650-1050nm
The LB1450-B is a high-quality bi-convex lens, designed and manufactured by Thorlabs, a leading global supplier of photonics equipment. This lens boasts a diameter of 0.5 inches and a focal length of 20.0 mm, making it a versatile choice for a wide range of optical applications.
The lens is crafted from N-BK7, a type of borosilicate glass known for its excellent optical properties. This material is particularly prized for its low dispersion, high homogeneity, and exceptional transmission in the visible and near-infrared spectra. The N-BK7 designation indicates that this lens is made from Schott glass, a brand renowned for its consistency and quality.
The LB1450-B features a spherical shape, with both surfaces curved outwards. This design, also known as a plano-convex lens, provides a wide field of view and low spherical aberration. The lens has a center thickness of 3.9 mm and an edge thickness of 1.8 mm, contributing to its robustness and durability.
The lens is coated with Thorlabs' BBAR (Broadband Anti-Reflection) coating, which significantly reduces surface reflections and increases transmission across the 650-1050 nm range. This coating enhances the lens's performance in applications such as laser systems, biomedical imaging, and optical spectroscopy.