LB1757-B N-BK7 Bi-Convex Lens; Dia:1 in; f=30.0 mm ARC 650-1050nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- 30 mm
- BFL
- 27.3 mm
- R1
- 29.5 mm
- R2
- -29.5 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
LB1757-B N-BK7 Bi-Convex Lens; Dia:1 in; f=30.0 mm ARC 650-1050nm
The LB1757-B is a high-quality bi-convex lens, designed and manufactured by Thorlabs, a leading global supplier of photonics equipment. This lens is part of their extensive catalog of optical elements, which are sourced from various vendors worldwide.
The lens is constructed from N-BK7, a popular glass type in the optical industry, known for its excellent optical properties and versatility. The lens has a diameter of 1 inch (25.4 mm) and a focal length of 30.0 mm, making it suitable for a wide range of applications.
The LB1757-B features a double-convex design, which provides a high level of focusing power. The radii of curvature for the first and second surfaces are 29.5 mm and -29.5 mm, respectively. This design results in an effective focal length (EFL) of 30.0 mm and a back focal length (BFL) of 27.3 mm.
The lens is coated with a broadband anti-reflection coating, designed to operate over the 650-1050nm wavelength range. This coating reduces surface reflections, thereby improving transmission and overall performance.
The lens has a central thickness of 7.7 mm and an edge thickness of 2 mm. The lens is designed to be used in air, with an index of refraction of 1.000293.