49-283 40 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=500mm VIS 0° 425-675nm
- 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
49-283 40 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=500mm VIS 0° 425-675nm
The 49-283 is a high-quality achromatic doublet lens, boasting a 40 mm diameter and an effective focal length (EFL) of 500mm, 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 directly from their website.
The lens is constructed from two types of Schott glass: N-BK7 and N-SF5. This combination allows for superior chromatic correction, minimizing both spherical and chromatic aberrations. The lens's geometry is meticulously designed with a 9.04mm edge thickness, a 6mm center thickness, and a 4mm center 'a' thickness, ensuring optimal performance and durability.
The lens features a front and back coating of EDM VIS-0 STD CURVE, providing excellent anti-reflection properties and further enhancing its optical performance. The lens's shape is a multiplet, which is a combination of multiple individual lenses, further improving its ability to correct optical aberrations.
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