ACT508-200-A 50.8 mm Dia. N-BK7/N-SF2 Unmounted Achromatic Doublet; EFL=200mm 400-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 50.8 mm
- R1
- 106.2 mm
- R2
- -92.1 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
ACT508-200-A 50.8 mm Dia. N-BK7/N-SF2 Unmounted Achromatic Doublet; EFL=200mm 400-700nm
The ACT508-200-A is a high-quality achromatic doublet lens, sourced from the renowned optical component manufacturer, Thorlabs. This lens, with a diameter of 50.8 mm, is designed for use in the 400-700nm spectral range, making it suitable for a wide range of applications in the visible spectrum.
The lens is a multiplet, meaning it is composed of multiple optical elements. The primary materials used in its construction are N-BK7 and N-SF2, both of which are high-grade Schott glasses known for their excellent optical properties. The use of these materials ensures high transmission and low dispersion, contributing to the lens's overall performance.
The lens's geometry is carefully designed to optimize its optical properties. It has a thickness of 12.8 mm at the edge, with the first and second centers having thicknesses of 10.6 mm and 6 mm, respectively. The lens's radii of curvature are r1=106.2, r2=-92.1, and r3=-409.4, further enhancing its optical performance.
The lens is coated with THo AC400-700-A, a broadband anti-reflection coating designed for use in the 400-700nm range. This coating reduces surface reflections, thereby increasing transmission and improving the lens's overall performance.
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