AC254-200-A 25.4 mm Dia. N-SSK5/LAFN7 Unmounted Achromatic Doublet; EFL=200.2mm 400-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- R1
- 77.4 mm
- R2
- -87.6 mm
Material 1
- Name
- N-SSK5
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6611973884654312
- λ
- 550 nm
- B1
- 1.59222659
- C1
- 0.00920284626 μm2
- B2
- 0.103520774
- C2
- 0.0423530072 μm2
- B3
- 1.05174016
- C3
- 106.927374 μm2
Material 2
- Name
- LAFN7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.7540480256427413
- λ
- 550 nm
- B1
- 1.66842615
- C1
- 0.0103159999 μm2
- B2
- 0.298512803
- C2
- 0.0469216348 μm2
- B3
- 1.0774376
- C3
- 82.5078509 μm2
AC254-200-A 25.4 mm Dia. N-SSK5/LAFN7 Unmounted Achromatic Doublet; EFL=200.2mm 400-700nm
The AC254-200-A is a high-quality achromatic doublet lens from Thorlabs, designed with a 25.4 mm diameter and a focal length of 200.2mm for the 400-700nm wavelength range. This lens is a multiplet type, featuring a complex geometry that includes three radii (r1: 77.4, r2: -87.6, r3: 291.1) and two center thicknesses (thickness center 1: 4, thickness center 2: 2.5).
The lens is made from two types of Schott glass, N-SSK5 and LAFN7, which are renowned for their optical properties. The lens is coated with Thorlabs' proprietary AC400-700-A coating on both the front and back surfaces, enhancing its performance in the specified wavelength range.
The lens is unmounted, providing users with the flexibility to integrate it into their optical systems according to their specific requirements. The catalog number AC254-200-A is valid and in stock, indicating its availability for immediate purchase and use.
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