SLB-25-200NIR2 25.0 mm Dia. x -200.0 mm FL; Coated; Plano-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- -200 mm
- BFL
- -201.3 mm
- R1
- -103.8 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-25-200NIR2 25.0 mm Dia. x -200.0 mm FL; Coated; Plano-Concave Lens 750-1550nm
OptoSigma offers the SLB-25-200NIR2, a Plano-Concave Spherical Lens with a 25.0 mm diameter and a focal length of -200.0 mm. This lens is designed for use within the wavelength range of 750-1550nm, making it suitable for near-infrared (NIR) applications.
The lens is made from n-BK7 Schott, a widely used optical glass due to its excellent optical properties. The lens features a plano-concave geometry, meaning one side is flat, and the other side is curved inward. This particular lens has an inner radius of 0 mm and an outer radius of 0 mm. The edge thickness measures 2.8 mm, while the center thickness is 2 mm.
The SLB-25-200NIR2 comes with a broadband anti-reflection coating, specifically the opt IR2 coating, on both the front and back surfaces. This coating enhances the lens's performance by reducing surface reflections, thereby increasing transmission.