LB4700-B UV Fused Silica Bi-Convex Lens; Dia:0.5 in; f=40.0 mm ARC 650-1050nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 12.7 mm
- EFL
- 40 mm
- BFL
- 39.9 mm
- R1
- 36.3 mm
- R2
- -36.3 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
LB4700-B UV Fused Silica Bi-Convex Lens; Dia:0.5 in; f=40.0 mm ARC 650-1050nm
The LB4700-B 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 0.5 inches and a focal length of 40.0 mm, making it suitable for a wide range of optical applications.
The lens is made from UV fused silica, a material known for its excellent transmission properties across a broad spectrum, from 190 to 2000 nm. This makes the LB4700-B particularly suitable for applications that require high transmission in the ultraviolet region, such as UV spectroscopy or fluorescence microscopy.
The lens features a spherical geometry, with radii of curvature of 36.3 mm for both the front and back surfaces. This design results in an effective focal length of 40.0 mm and a back focal length of 39.9 mm. The lens has a central thickness of 2.9 mm and an edge thickness of 1.8 mm, providing robustness and durability.
The LB4700-B is coated with Thorlabs' BBAR coating, which is designed to reduce reflection and increase transmission across the 650-1050 nm range. This coating ensures optimal performance in the visible spectrum, making the lens ideal for applications such as imaging, beam shaping, and laser focusing.