SLB-30B-50NIR2 30.0 mm Dia. x -49.7 mm FL; Coated; Double-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 30 mm
- EFL
- -49.7 mm
- BFL
- -50.3 mm
- R1
- -51.9 mm
- R2
- 51.9 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-30B-50NIR2 30.0 mm Dia. x -49.7 mm FL; Coated; Double-Concave Lens 750-1550nm
The SLB-30B-50NIR2 is a high-quality double-concave lens, designed and manufactured by OptoSigma. This lens, with a diameter of 30.0 mm and a focal length of -49.7 mm, is specifically engineered for use within the wavelength range of 750-1550nm, making it ideal for near-infrared applications.
The lens is constructed from n-BK7 Schott, a popular optical glass due to its excellent optical properties and high transmittance in the visible and near-infrared regions. The base shape of the lens is circular, and it features a spherical geometry with a center thickness of 2mm and an edge thickness of 6.4mm. The inner and outer radii are 0mm, and the back focal length is -50.3mm.
The SLB-30B-50NIR2 is coated with Opt IR2 on both the front and back surfaces. This coating enhances the lens's performance in the near-infrared region, providing improved transmission and reducing surface reflections. The coating also offers protection against environmental factors, ensuring the longevity and durability of the lens.