SLB-20-70NIR2 20.0 mm Dia. x -70.0 mm FL; Coated; Plano-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- -70 mm
- BFL
- -71.3 mm
- R1
- -36.33 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-20-70NIR2 20.0 mm Dia. x -70.0 mm FL; Coated; Plano-Concave Lens 750-1550nm
The SLB-20-70NIR2 is a Plano-Concave Spherical Lens, sourced from the reputable vendor OptoSigma. This lens boasts a diameter of 20.0 mm and a focal length of -70.0 mm, making it suitable for a wide range of optical applications.
The lens is crafted from n-bk7 schott, a high-quality optical glass known for its excellent transmittance and homogeneity. The base shape of the lens is circular, and it features an inner radius of 0 mm and an outer radius of 0 mm.
The lens's geometry is defined by a thickness edge of 3.4 mm and a thickness center of 2 mm. The back focal length (bfl) is -71.3 mm, and the radius of curvature (r1) is -36.33 mm.
The SLB-20-70NIR2 is coated with opt ir2 on both the front and back, enhancing its performance in the 750-1550nm wavelength range. This coating ensures optimal light transmission and reduces surface reflections, making it an ideal choice for applications that require high-precision optical performance.