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49-350 20 mm Dia. N-BAF10/N-SF10 Achromatic Doublet; EFL=40mm VIS-NIR 400-1000nm

49-350 20 mm Dia. N-BAF10/N-SF10 Achromatic Doublet; EFL=40mm VIS-NIR 400-1000nm

Type
Lens
Subtype
Multiplets
Brand
Edmund Optics
Product webpage
Edmund Optics products in the 3DOptix catalog

Properties

Shape
Circular
Diameter
20 mm
EFL
40 mm
R1
27.63 mm
R2
-17.58 mm

Material 1

Name
N-BAF10
Dispersion Equation
Sellmeier
n (λ)
1.6730569473646495
λ
550 nm
B1
1.5851495
C1
0.00926681282 μm2
B2
0.143559385
C2
0.0424489805 μm2
B3
1.08521269
C3
105.613573 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

49-350 20 mm Dia. N-BAF10/N-SF10 Achromatic Doublet; EFL=40mm VIS-NIR 400-1000nm

The 49-350 is a high-quality achromatic doublet lens, boasting a 20 mm diameter and an effective focal length of 40mm, specifically designed for the visible to near-infrared spectrum (400-1000nm). This lens is sourced from the reputable optical vendor, Edmund Optics, and is available for purchase on their official website.

The lens is constructed from two types of Schott glass, N-BAF10 and N-SF10, which are renowned for their excellent optical properties. The lens features a multilayer anti-reflection coating, specifically the EDM VIS-NIR 0SP2002000 coating, on both the front and back surfaces. This coating enhances the lens's performance by reducing surface reflections, thereby increasing transmission and minimizing lens flare and ghosting.

The lens geometry is meticulously designed, with an edge thickness of 7.83mm and a center thickness of 8mm. The lens also features a central thickness 'a' of 2mm, which provides additional design flexibility. The radii of curvature for the three surfaces are R1=27.63mm, R2=-17.58mm, and R3=-171.25mm. These parameters contribute to the lens's excellent imaging performance and chromatic correction.

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