SLB-50.8-250NIR2 50.8 mm Dia. x -250.0 mm FL; Coated; Plano-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 50.8 mm
- EFL
- -250 mm
- BFL
- -252 mm
- R1
- -129.75 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-50.8-250NIR2 50.8 mm Dia. x -250.0 mm FL; Coated; Plano-Concave Lens 750-1550nm
The SLB-50.8-250NIR2 is a Plano-Concave Spherical Lens, designed with a diameter of 50.8 mm and a focal length of -250.0 mm. This lens is sourced from OptoSigma, a renowned vendor in the optical industry. The lens is made of n-bk7 schott material, a high-quality glass known for its excellent optical properties.
The lens's geometry is meticulously crafted, with a thickness edge of 5.5 mm and a thickness center of 3 mm. The inner and outer radii are both zero, indicating a uniform curvature. The back focal length (bfl) is -252 mm, slightly longer than the effective focal length (efl) of -250 mm. This discrepancy is common in optical lenses and does not affect the lens's performance.
The lens is coated with opt ir2 on both the front and back surfaces, enhancing its performance in the 750-1550nm wavelength range. This coating is specifically designed for near-infrared applications, making this lens an ideal choice for such uses.