ACN254-075-B 25.4 mm Dia. N-BAF10/N-SF6HT Unmounted Achromatic Doublet; EFL=-75mm 650-1050nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- R1
- -37.14 mm
- R2
- 46.39 mm
Material 1
- Name
- N-BAF10
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6730569473646495
- λ
- 550 nm
- B1
- 1.5851495
- C1
- 0.00926681282 μm2
- B2
- 0.143559385
- C2
- 0.0424489805 μm2
- B3
- 1.08521269
- C3
- 105.613573 μm2
Material 2
- Name
- N-SF6HT
- 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
ACN254-075-B 25.4 mm Dia. N-BAF10/N-SF6HT Unmounted Achromatic Doublet; EFL=-75mm 650-1050nm
The ACN254-075-B is a 25.4 mm diameter achromatic doublet lens, sourced from the renowned optical component manufacturer, Thorlabs. This unmounted lens is designed for use within the spectral range of 650-1050nm, making it suitable for a wide range of applications within this spectrum.
The lens features a negative focal length (EFL) of -75mm, indicating its diverging nature. This characteristic is particularly useful in applications where beam expansion or divergence is required. The lens is constructed from two types of Schott glass, N-BAF10 and N-SF6HT, each selected for their specific optical properties, contributing to the lens's overall performance.
The geometry of the lens is carefully crafted, with an edge thickness of 7.9mm and a central thickness of 2mm and 3.8mm at the two respective centers. The lens's curved surfaces have radii of -37.14mm, 46.39mm, and -494.3mm, contributing to its achromatic properties.
The lens is coated with Thorlabs' proprietary anti-reflection coating, AC650-1050-B, on both the front and back surfaces. This coating is specifically designed to minimize surface reflections within the 650-1050nm spectral range, thereby enhancing the lens's transmission efficiency and overall performance.
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