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47-674 9 mm Dia. N-BASF64/N-BK7/N-BASF64 Steinheil Achromatic Triplet; EFL=18mm MgF2 400-700nm

47-674 9 mm Dia. N-BASF64/N-BK7/N-BASF64 Steinheil Achromatic Triplet; EFL=18mm MgF2 400-700nm

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

Properties

Shape
Circular
Diameter
9 mm
EFL
18 mm
R1
11.25 mm
R2
5.89 mm

Material 1

Name
N-BASF64
Dispersion Equation
Sellmeier
n (λ)
1.7077938628679645
λ
550 nm
B1
1.65554268
C1
0.0104485644 μm2
B2
0.17131977
C2
0.0499394756 μm2
B3
1.33664448
C3
118.961472 μm2

Material 2

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 3

Name
N-BASF64
Dispersion Equation
Sellmeier
n (λ)
1.7077938628679645
λ
550 nm
B1
1.65554268
C1
0.0104485644 μm2
B2
0.17131977
C2
0.0499394756 μm2
B3
1.33664448
C3
118.961472 μm2

47-674 9 mm Dia. N-BASF64/N-BK7/N-BASF64 Steinheil Achromatic Triplet; EFL=18mm MgF2 400-700nm

The 47-674 is a high-quality achromatic triplet lens, boasting a 9 mm diameter and an effective focal length (EFL) of 18 mm. This lens is meticulously crafted from three distinct materials - N-BASF64 from Schott, N-BK7 from Schott, and again N-BASF64 from Schott. This strategic combination of materials ensures superior optical performance and minimal chromatic aberration.

The lens features a robust construction, with a thickness of 11.08 mm at the edge and 2.88 mm at the center. The inner and outer radii are thoughtfully designed to optimize light transmission and focus. The first radius (r1) is 11.25 mm, while the second (r2) and third (r3) radii are 5.89 mm and -5.89 mm respectively. The fourth radius (r4) is -11.25 mm, mirroring the first radius.

The 47-674 lens is coated with Edmund Optics' standard MgF2 coating on both the front and back surfaces, ensuring excellent transmission rates within the 400-700 nm spectral range. This coating enhances the lens's durability and resistance to environmental factors, making it an ideal choice for various applications.

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