LB1904-C N-BK7 Bi-Convex Lens; Dia:1 in; f=125.0 mm ARC 1050-1700nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- 50 mm
- BFL
- 123.9 mm
- R1
- 128.2 mm
- R2
- -128.2 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
LB1904-C N-BK7 Bi-Convex Lens; Dia:1 in; f=125.0 mm ARC 1050-1700nm
The LB1904-C is a high-quality bi-convex lens manufactured by Thorlabs, a leading global supplier of photonics equipment. This lens boasts a diameter of 1 inch and a focal length of 125.0 mm, making it suitable for a wide range of optical applications.
The lens is made from N-BK7, a popular optical glass from Schott, known for its excellent optical properties and versatility. The N-BK7 material ensures high transmission and low dispersion, making it an ideal choice for applications that require high-precision optics.
The LB1904-C features a spherical design with a radius of curvature of 128.2 mm on both sides. This bi-convex geometry provides a large numerical aperture, enhancing the lens's light-gathering capability. The lens has a central thickness of 6.1 mm and an edge thickness of 2 mm, ensuring robustness and durability.
The lens is coated with Thorlabs' proprietary anti-reflection coating, designed to operate in the 1050-1700 nm wavelength range. This coating reduces surface reflections, improving the lens's transmission and overall performance.