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47-733 20 mm Dia. S-BAH11/N-SF10 Achromatic Doublet; EFL=30mm VIS 0° 425-675nm

47-733 20 mm Dia. S-BAH11/N-SF10 Achromatic Doublet; EFL=30mm VIS 0° 425-675nm

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

Properties

Shape
Circular
Diameter
20 mm
EFL
30 mm
R1
21.41 mm
R2
-13.75 mm

Material 1

Name
S-BAH11
Dispersion Equation
Sellmeier
n (λ)
1.6696557498333158
λ
550 nm
B1
1.5713886
C1
0.00910807936 μm2
B2
0.147869313
C2
0.0402401684 μm2
B3
1.28092846
C3
130.399367 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

47-733 20 mm Dia. S-BAH11/N-SF10 Achromatic Doublet; EFL=30mm VIS 0° 425-675nm

The 47-733 is a high-quality achromatic doublet lens, sourced from Edmund Optics, featuring a 20 mm diameter and an effective focal length (EFL) of 30 mm. This lens is specifically designed for the visible spectrum, covering a wavelength range of 425-675 nm.

The lens is constructed from two types of glass: S-BAH11 from Ohara and N-SF10 from Schott. The S-BAH11 glass is used for the first element, while the N-SF10 glass is used for the second element. This combination helps to correct chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points.

The lens features a standard anti-reflection coating on both the front and back surfaces, specifically the EDM VIS-0 std curve coating. This coating helps to reduce surface reflections, improving light transmission through the lens.

The lens geometry includes a central thickness of 8.4 mm, with an edge thickness of 7.21 mm. The lens has a concave-convex-concave shape, with radii of curvature of 21.41 mm, -13.75 mm, and -105.58 mm for the first, second, and third surfaces, respectively. There is also a minor asymmetry in the lens design, with a thickness of 1.76 mm at the center of the first surface.

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