45-220 12.5 mm Dia. N-BK7/N-SF5 Negative Achromatic Doublet; EFL=-50mm MgF2 400-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 12.5 mm
- EFL
- -50 mm
- R1
- -30.83 mm
- R2
- 23.47 mm
Material 1
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5185223876207927
- λ
- 550 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
Material 2
- Name
- N-SF5
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6771143911586193
- λ
- 550 nm
- B1
- 1.52481889
- C1
- 0.011254756 μm2
- B2
- 0.187085527
- C2
- 0.0588995392 μm2
- B3
- 1.42729015
- C3
- 129.141675 μm2
45-220 12.5 mm Dia. N-BK7/N-SF5 Negative Achromatic Doublet; EFL=-50mm MgF2 400-700nm
The 45-220 is a high-quality negative achromatic doublet lens, boasting a 12.5 mm diameter and a focal length of -50mm. This lens is sourced from the renowned optical vendor, Edmund Optics, and is available for purchase on their official website. The product link provided is currently valid and indicates that the lens is in stock.
The lens is constructed from two types of materials, N-BK7 and N-SF5, both from Schott. This combination ensures superior optical performance and durability. The lens features a complex geometry, with an inner radius of 0, an outer radius of 0, and a thickness edge of 4.4 mm. The center thickness is 2 mm, while the center thickness 'a' is 1.56 mm.
The lens is coated with Edmund Optics' standard MgF2 coating on both the front and back surfaces, ensuring optimal light transmission within the 400-700nm spectrum. This coating is part of the standard curve offered by Edmund Optics, ensuring consistent performance and compatibility with other optical elements in your system.
The 45-220 is a multiplet lens, meaning it is composed of multiple optical elements. This design allows for more precise control over optical aberrations, making it an ideal choice for a wide range of optical applications.
