49-385 40 mm Dia. N-BAK4/N-SF10 Achromatic Doublet; EFL=300mm VIS-NIR 400-1000nm
- 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
49-385 40 mm Dia. N-BAK4/N-SF10 Achromatic Doublet; EFL=300mm VIS-NIR 400-1000nm
The 49-385 is a high-quality achromatic doublet lens, boasting a 40 mm diameter and a focal length of 300mm, specifically designed for the visual (VIS) and near-infrared (NIR) spectrum, spanning 400-1000nm. 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 VISNIR0SP2002000 coating, enhancing its performance in the VIS-NIR spectrum.
The lens geometry is meticulously designed, with an inner radius of 0 and an outer radius of 0, ensuring optimal light transmission. The thickness at the edge is 11.66mm, while the center thickness is 9mm, and the center thickness 'a' is 4.1mm. The lens's base shape is circular, and it is classified as a multiplet due to its construction from multiple optical elements.
