SLB-50-120N 50.0 mm Dia. x -120.0 mm FL; Plano-Concave Lens Uncoated
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 50 mm
- EFL
- -120 mm
- BFL
- -122 mm
- R1
- -62.28 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-50-120N 50.0 mm Dia. x -120.0 mm FL; Plano-Concave Lens Uncoated
The SLB-50-120N is a Plano-Concave Lens with a diameter of 50.0 mm and a focal length of -120.0 mm, making it a negatively powered lens. This lens is sourced from OptoSigma, a renowned vendor in the optical industry, and is uncoated.
The lens is made of n-BK7 Schott, a popular optical glass due to its excellent optical properties and high chemical durability. The geometry of the lens includes an edge thickness of 8.2 mm and a center thickness of 3 mm. The inner and outer radii are both 0 mm, indicating a flat surface on both sides of the lens.
The back focal length (BFL) of the lens is -122 mm, slightly longer than its effective focal length (EFL) of -120 mm. This discrepancy is due to the thickness of the lens, which is considered in the BFL but not in the EFL.
The lens is designed for use at a wavelength of 546.1 nm, a common wavelength for visible light applications. It is important to note that the lens is uncoated, meaning it does not have any anti-reflective or other surface coatings. This may affect its performance in certain applications, particularly those involving high-intensity light or specific wavelength ranges.
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