AC254-300-A-ML 25.4 mm Dia. N-BK7/SF2 Mounted Achromatic Doublet; EFL=300mm 400-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- R1
- 165.2 mm
- R2
- -137.1 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
- SF2
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6517416788523134
- λ
- 550 nm
- B1
- 1.40301821
- C1
- 0.0105795466 μm2
- B2
- 0.231767504
- C2
- 0.0493226978 μm2
- B3
- 0.939056586
- C3
- 112.405955 μm2
AC254-300-A-ML 25.4 mm Dia. N-BK7/SF2 Mounted Achromatic Doublet; EFL=300mm 400-700nm
The AC254-300-A-ML is a high-quality achromatic doublet lens from Thorlabs, designed with a 25.4 mm diameter and a focal length of 300mm. This lens is specifically engineered for use in the 400-700nm spectral range, making it ideal for a wide range of applications in the visible spectrum.
The lens is constructed from two types of glass: N-BK7 from Schott and SF2 from Schott. N-BK7, also known as Borosilicate Crown, is a popular optical glass due to its excellent optical properties and high damage threshold. SF2, or Dense Flint, is a high-index flint glass with a low Abbe number, making it suitable for use in achromatic doublets.
The lens features a robust mount for secure and stable placement in optical systems. The mount includes a thread for easy integration into existing setups. The lens itself has a central thickness of 4mm and edge thickness of 5.4mm, providing rigidity and resistance to deformation.
The lens is coated with 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 in the 400-700nm range. The coating also provides protection against environmental factors, ensuring the longevity and performance of the lens.
