SLB-15B-20NIR1 15.0 mm Dia. x -19.7 mm FL; Coated; Double-Concave Lens 633-1064nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 15 mm
- EFL
- -19.7 mm
- BFL
- -20.3 mm
- R1
- -20.7 mm
- R2
- 20.7 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.518720636186463
- λ
- 546.1 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
SLB-15B-20NIR1 15.0 mm Dia. x -19.7 mm FL; Coated; Double-Concave Lens 633-1064nm
The SLB-15B-20NIR1 is a high-quality double-concave lens, 15.0 mm in diameter, and with a focal length of -19.7 mm. This lens is sourced from OptoSigma, a renowned vendor known for its precision optical components.
The lens is made of n-bk7 schott, a popular material in the optical industry due to its excellent optical properties. It features a base shape of a circle, with a thickness of 4.8 mm at the edge and 2 mm at the center, providing a balanced structure for various applications.
The SLB-15B-20NIR1 is coated with opt ir1 on both the front and back surfaces, enhancing its performance in the 633-1064nm wavelength range. This coating ensures optimal light transmission and reduces unwanted reflections, making it suitable for use in laser systems and other applications where high-transmission and low-loss are critical.
The lens's geometry, with radii of curvature of -20.7 mm and 20.7 mm for the first and second surfaces, respectively, contributes to its double-concave shape. This shape is ideal for use in applications requiring beam convergence or divergence.