ACT508-400-A 50.8 mm Dia. N-BK7/N-SF2 Unmounted Achromatic Doublet; EFL=400mm 400-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 50.8 mm
- R1
- 292.3 mm
- R2
- -148.9 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-SF2
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6517389452840492
- λ
- 550 nm
- B1
- 1.47343127
- C1
- 0.0109019098 μm2
- B2
- 0.163681849
- C2
- 0.0585683687 μm2
- B3
- 1.36920899
- C3
- 127.404933 μm2
ACT508-400-A 50.8 mm Dia. N-BK7/N-SF2 Unmounted Achromatic Doublet; EFL=400mm 400-700nm
The ACT508-400-A is a high-quality achromatic doublet lens, unmounted and with a diameter of 50.8 mm, sourced from the renowned optical component manufacturer, Thorlabs. This lens is designed for use within the 400-700nm wavelength range, making it suitable for a wide array of applications within the visible light spectrum.
The lens features a geometry that includes an outer radius of 0mm, an inner radius of 0mm, and a thickness edge of 14.1mm. The first and second radii of curvature are r1=292.3mm and r2=-148.9mm, while the third radius of curvature is r3=-398.5mm. The lens has two centers with equal thicknesses of 8mm.
The ACT508-400-A is composed of two types of glass: N-BK7 from Schott and N-SF2 from Schott. These materials have been carefully selected to minimize chromatic aberration, a common issue in optical systems that use lenses with different refractive indices for various wavelengths.
The lens is coated with the THORLABS AC400-700-A coating on both the front and back surfaces. This anti-reflection coating is designed to reduce surface reflections and increase transmission within the 400-700nm wavelength range.
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