49-938 9 mm Dia. N-BAF10/N-SF6 Achromatic Doublet; EFL=15mm VIS 0° 425-675nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 9 mm
- EFL
- 15 mm
- R1
- 10.49 mm
- R2
- -8.08 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-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
49-938 9 mm Dia. N-BAF10/N-SF6 Achromatic Doublet; EFL=15mm VIS 0° 425-675nm
The 49-938 is a high-quality achromatic doublet lens, boasting a 9 mm diameter and an effective focal length (EFL) of 15 mm, specifically designed for the visible spectrum range of 425-675 nm. 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-BAF10 and N-SF6, which are carefully selected and arranged to minimize chromatic aberration, a common issue in optical systems. The front and back surfaces of the lens are coated with the EDM VIS-0 standard curve coating, enhancing its light transmission capabilities and providing excellent protection against environmental factors.
The lens geometry is meticulously designed, with a thickness of 4.22 mm at the edge, a center thickness of 4 mm, and a center thickness 'a' of 1.5 mm. The lens curvature is defined by three radii: r1 at 10.49 mm, r2 at -8.08 mm, and r3 at -38.23 mm. The lens is shaped as a multiplet, which is a combination of multiple individual lenses, offering superior optical performance.
