47-271 25 mm Dia. N-LAK22/N-SF6 Achromatic Doublet; EFL=200mm NIR II 750-1550nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 200 mm
- R1
- 112.88 mm
- R2
- -112.88 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
47-271 25 mm Dia. N-LAK22/N-SF6 Achromatic Doublet; EFL=200mm NIR II 750-1550nm
The 47-271 is a high-quality achromatic doublet lens, boasting a 25 mm diameter and an effective focal length of 200mm, specifically designed for use in the near-infrared spectrum, covering the wavelength range of 750-1550nm. This lens is sourced from the reputable optical vendor, Edmund Optics, and is available for purchase directly from their website.
The lens is constructed from two types of Schott glass, N-LAK22 and N-SF6, which have been carefully selected and arranged to minimize chromatic aberration, a common issue in optical systems. The lens features a robust design with a thickness of 9.25mm at the edge and 6mm at the center, ensuring durability and stability. The inner and outer radii are 0mm, indicating a symmetrical design that can be beneficial in many applications.
The 47-271 lens is coated with Edmund Optics' standard NIR-II coating on both the front and back surfaces. This coating is specifically designed to enhance performance in the near-infrared spectrum, providing improved transmission and reduced reflectance. The coating is a crucial component in ensuring the lens's overall performance and longevity.
