AC254-200-C 25.4 mm Dia. N-LAK22/N-SF6 Unmounted Achromatic Doublet; EFL=200.1mm 1050-1700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- R1
- 70 mm
- R2
- -95.9 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-SF6
- 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
AC254-200-C 25.4 mm Dia. N-LAK22/N-SF6 Unmounted Achromatic Doublet; EFL=200.1mm 1050-1700nm
The AC254-200-C is a high-quality achromatic doublet lens, designed and manufactured by Thorlabs. This lens is specifically engineered for use in the 1050-1700nm wavelength range, making it an ideal choice for a wide range of applications in the infrared spectrum.
The lens features a 25.4mm diameter and a focal length of 200.1mm, providing a high level of optical performance and versatility. The lens is constructed from two different types of Schott glass, N-LAK22 and N-SF6, which are carefully selected and arranged to minimize chromatic aberration, a common issue in optical systems.
The lens is unmounted, providing users with the flexibility to integrate it into their own optical systems. It has a central thickness of 4mm and edge thickness of 6.2mm, ensuring durability and resistance to mechanical stress. The lens also features a complex geometry, with radii of curvature of 70mm, -95.9mm, and 274.3mm, which are optimized to provide the best possible optical performance.
The lens is coated with Thorlabs' proprietary AC1050-1700-C coating on both the front and back surfaces. This coating is designed to enhance the lens's transmission in the 1050-1700nm range, further improving its performance in infrared applications.
