LB1378-A N-BK7 Bi-Convex Lens; Dia:0.5 in; f=40.0 mm ARC 350-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 12.7 mm
- EFL
- 40 mm
- BFL
- 39.1 mm
- R1
- 40.7 mm
- R2
- -40.7 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
LB1378-A N-BK7 Bi-Convex Lens; Dia:0.5 in; f=40.0 mm ARC 350-700nm
The LB1378-A 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 (12.7 mm) and a focal length of 40.0 mm, making it suitable for a wide range of optical applications.
The lens is made from N-BK7, a popular optical glass due to its excellent optical properties and high Abbe number. This material ensures low dispersion and high homogeneity, making it an ideal choice for applications that require high-precision optics.
The LB1378-A features a spherical design, with radii of curvature of 40.7 mm for the first surface and -40.7 mm for the second surface. This bi-convex geometry helps to minimize spherical aberration, ensuring optimal image quality.
The lens has a central thickness of 2.8 mm and an edge thickness of 1.8 mm, providing robustness and durability. It is coated with a broadband anti-reflection coating, designed to operate between 350 nm and 700 nm. This coating reduces surface reflections, enhancing transmission and improving overall system performance.