47-733 20 mm Dia. S-BAH11/N-SF10 Achromatic Doublet; EFL=30mm VIS 0° 425-675nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
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.
