AC254-250-A 25.4 mm Dia. N-BK7/SF2 Unmounted Achromatic Doublet; EFL=250mm 400-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- R1
- 137.1 mm
- R2
- -111.5 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
AC254-250-A 25.4 mm Dia. N-BK7/SF2 Unmounted Achromatic Doublet; EFL=250mm 400-700nm
The AC254-250-A is a high-quality achromatic doublet lens, sourced from the renowned optical component manufacturer, Thorlabs. This lens is specifically designed for use in the 400-700nm wavelength range, making it suitable for a wide range of optical applications.
The lens features a 25.4mm diameter and has a focal length of 250mm, as indicated by its EFL (Effective Focal Length) value. The achromatic design of the lens ensures that it effectively compensates for chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points.
The lens is composed of two elements, made from N-BK7 and SF2 Schott glass. These materials were chosen for their excellent optical properties, including high transparency and low dispersion. The lens is unmounted, providing users with the flexibility to integrate it into their optical systems in the most suitable manner.
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, further enhancing the lens' performance.
