45-270 40 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=500mm MgF2 400-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 40 mm
- EFL
- 500 mm
- R1
- 305.31 mm
- R2
- -224.08 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
45-270 40 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=500mm MgF2 400-700nm
The 45-270 is a high-quality achromatic doublet lens, boasting a 40 mm diameter and a focal length of 500mm. 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 item is in stock.
The lens is constructed from two types of glass, N-BK7 and N-SF5, both from Schott. This combination is used to correct chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points. The achromatic design ensures that the lens focuses both red and blue light at the same point, providing sharper images.
The lens features a front and back coating of edm mgf2 std curve, which is a type of anti-reflective coating. This coating reduces light loss due to reflection, improving the overall light transmission of the lens.
The geometry of the lens includes a thickness of 9.04mm at the edge, a center thickness of 6mm, and a center thickness 'a' of 4mm. The lens's inner and outer radii are not specified, indicating that they are not a significant factor in the lens's performance or description.
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