49-280 40 mm Dia. N-BAK4/N-SF10 Achromatic Doublet; EFL=300mm VIS 0° 425-675nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 40 mm
- EFL
- 300 mm
- R1
- 194.96 mm
- R2
- -148.27 mm
Material 1
- Name
- N-BAK4
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5709961571059783
- λ
- 550 nm
- B1
- 1.28834642
- C1
- 0.00779980626 μm2
- B2
- 0.132817724
- C2
- 0.0315631177 μm2
- B3
- 0.945395373
- C3
- 105.965875 μm2
Material 2
- Name
- N-SF10
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.7336618876174243
- λ
- 550 nm
- B1
- 1.62153902
- C1
- 0.0122241457 μm2
- B2
- 0.256287842
- C2
- 0.0595736775 μm2
- B3
- 1.64447552
- C3
- 147.468793 μm2
49-280 40 mm Dia. N-BAK4/N-SF10 Achromatic Doublet; EFL=300mm VIS 0° 425-675nm
The 49-280 is a high-quality achromatic doublet lens, boasting a 40 mm diameter and an effective focal length of 300mm, specifically designed for the visible light spectrum ranging from 425 to 675nm. This lens is sourced from the renowned optical vendor, Edmund Optics, and is available for purchase on their official website.
The lens is constructed from two types of Schott glass, N-BAK4 and N-SF10, which are renowned for their excellent optical properties. The front and back surfaces of the lens are coated with the EDM VIS-0 standard curve coating, enhancing its light transmission capabilities and overall performance.
The lens geometry is meticulously designed, with a thickness of 11.66mm at the edge, a center thickness of 9mm, and a central thickness 'a' of 4.1mm. The lens's first and second radii are 194.96mm and -148.27mm respectively, while the third radius is -483.71mm. The lens's base shape is circular, and it is classified as a multiplet due to its complex construction.
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