32-927-INK 40 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=400mm MgF2 400-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 40 mm
- EFL
- 400 mm
- R1
- 257.16 mm
- R2
- -169.03 mm
Material 1
- 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 2
- Name
- N-SF5
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6771143911586193
- λ
- 550 nm
- B1
- 1.52481889
- C1
- 0.011254756 μm2
- B2
- 0.187085527
- C2
- 0.0588995392 μm2
- B3
- 1.42729015
- C3
- 129.141675 μm2
32-927-INK 40 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=400mm MgF2 400-700nm
The 32-927-INK is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a diameter of 40 mm, is designed for use in the visible spectrum, specifically optimized for the 400-700 nm range. The lens is constructed from two types of glass, N-BK7 and N-SF5, both from Schott, ensuring superior optical performance.
The lens features an effective focal length (EFL) of 400 mm, making it suitable for a wide range of applications that require long focal lengths. The lens's geometry includes a thickness of 11.3 mm at the edge, 8.5 mm at the center, and 4 mm at the center with an anti-reflection coating of MgF2 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.
The 32-927-INK lens is a multiplet, meaning it is composed of multiple elements. The curvature of these elements is carefully designed and controlled to correct chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points. This achromatic design ensures that the lens focuses light of different wavelengths onto a single point, providing sharp, clear images.
