49-952 12.5 mm Dia. N-BAF10/N-SF57 Achromatic Doublet; EFL=17.5mm VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 12.5 mm
- EFL
- 17.5 mm
- R1
- 12.2 mm
- R2
- -9.82 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-SF57
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.854148364121864
- λ
- 550 nm
- B1
- 1.87543831
- C1
- 0.0141749518 μm2
- B2
- 0.37375749
- C2
- 0.0640509927 μm2
- B3
- 2.30001797
- C3
- 177.389795 μm2
49-952 12.5 mm Dia. N-BAF10/N-SF57 Achromatic Doublet; EFL=17.5mm VIS-NIR 400-1000nm
The 49-952 is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens is specifically designed for use in the visible (VIS) and near-infrared (NIR) spectrum, spanning 400-1000nm. The lens boasts a 12.5mm diameter and an effective focal length (EFL) of 17.5mm, making it a versatile choice for a wide range of optical applications.
The lens is constructed from two types of glass, N-BAF10 and N-SF57, both from Schott. This combination is used to correct chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points. By using these specific types of glass, the lens can bring two wavelengths to a common focus, significantly improving the overall image quality.
The 49-952 lens features a robust design, with a thickness of 5.08mm at the edge and 5.8mm at the center. The center thickness can be further reduced to 1.5mm with the use of a spacer (not included). The lens also has a curved shape, with radii of 12.2mm and -9.82mm on the first and second surfaces, respectively, and a -39.19mm radius on the third surface.
The lens is coated with Edmund Optics' VIS-NIR coating (edm visnir0sp2002000), which is applied to both the front and back surfaces. This coating is designed to enhance the lens's performance in the VIS-NIR spectrum, reducing reflection and improving transmission.
