LB4821-C UV Fused Silica Bi-Convex Lens; Dia:2 in; f=100.0 mm ARC 1050-1700nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 50.8 mm
- EFL
- 100 mm
- BFL
- 96.4 mm
- R1
- 90.4 mm
- R2
- -90.4 mm
Material
- Name
- UVFS
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.458448271212196
- λ
- 588 nm
- B1
- 0.6961663
- C1
- 0.004679148 μm2
- B2
- 0.4079426
- C2
- 0.013512063 μm2
- B3
- 0.8974794
- C3
- 97.93400254 μm2
LB4821-C UV Fused Silica Bi-Convex Lens; Dia:2 in; f=100.0 mm ARC 1050-1700nm
The LB4821-C is a high-quality bi-convex lens, designed and manufactured by Thorlabs, a leading vendor in the optical industry. This lens boasts a diameter of 2 inches (50.8 mm) and a focal length of 100.0 mm, making it suitable for a wide range of optical applications.
The lens is made of UV fused silica, a material known for its excellent optical properties, including high transparency across a broad spectrum (1050-1700 nm), low auto-fluorescence, and high resistance to thermal shock and chemical etching. The base shape of the lens is circular, and it features a spherical geometry with radii of curvature of 90.4 mm for the first surface and -90.4 mm for the second surface.
The LB4821-C comes with a broadband anti-reflection coating, applied to both the front and back surfaces. This coating, designated as "tho c bbar," is designed to reduce surface reflections and increase transmission across the lens's operational wavelength range. The lens has a central thickness of 10.3 mm and an edge thickness of 3 mm, providing excellent optical performance and durability.
