AC508-400-B 50.8 mm Dia. N-LAK22/N-SF6HT Unmounted Achromatic Doublet; EFL=400mm 650-1050nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 50.8 mm
- R1
- 280.6 mm
- R2
- -208 mm
Material 1
- Name
- N-LAK22
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6536179449828925
- λ
- 550 nm
- B1
- 1.14229781
- C1
- 0.00585778594 μm2
- B2
- 0.535138441
- C2
- 0.0198546147 μm2
- B3
- 1.04088385
- C3
- 100.834017 μm2
Material 2
- Name
- N-SF6HT
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.811866267147773
- λ
- 550 nm
- B1
- 1.77931763
- C1
- 0.0133714182 μm2
- B2
- 0.338149866
- C2
- 0.0617533621 μm2
- B3
- 2.08734474
- C3
- 174.01759 μm2
AC508-400-B 50.8 mm Dia. N-LAK22/N-SF6HT Unmounted Achromatic Doublet; EFL=400mm 650-1050nm
The AC508-400-B is a high-quality achromatic doublet lens, designed and manufactured by Thorlabs. This lens, with a diameter of 50.8 mm, is specifically engineered for use within the spectral range of 650-1050nm, making it ideal for a wide range of applications in the near-infrared region.
The lens features a focal length of 400mm, indicated by the 'EFL=400mm' in its name. This long focal length allows for high magnification and detailed imaging, making it suitable for use in microscopy, telescopy, and other precision imaging applications.
The lens is constructed from two types of glass, N-LAK22 and N-SF6HT, both from Schott. These materials were chosen for their specific optical properties, which contribute to the lens's overall performance. The lens is coated with Thorlabs' proprietary AC650-1050-B coating on both the front and back surfaces, enhancing its transmission within the specified spectral range.
The lens's geometry is characterized by its edge thickness of 5.6mm, and its central thicknesses of 4.5mm and 2.6mm. The lens's complex surface profile, with radii of curvature of 280.6mm, -208mm, and -859mm, is designed to minimize chromatic aberration and ensure high-quality imaging.
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