49-387-INK 40 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=450mm VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 40 mm
- EFL
- 450 mm
- R1
- 279.6 mm
- R2
- -199.51 mm
Material 1
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5185223876207927
- λ
- 550 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
Material 2
- Name
- N-SF5
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6771143911586193
- λ
- 550 nm
- B1
- 1.52481889
- C1
- 0.011254756 μm2
- B2
- 0.187085527
- C2
- 0.0588995392 μm2
- B3
- 1.42729015
- C3
- 129.141675 μm2
49-387-INK 40 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=450mm VIS-NIR 400-1000nm
The 49-387-INK is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a diameter of 40 mm, is designed for use in the visible to near-infrared spectrum, spanning 400 to 1000 nm. The lens is specifically engineered to minimize chromatic aberration, ensuring clear, focused images across the entire spectral range.
The lens features a focal length of 450 mm, indicated by its Effective Focal Length (EFL). This long focal length makes it suitable for applications requiring high magnification or narrow fields of view. The lens is constructed from two types of glass, N-BK7 and N-SF5, both from Schott, ensuring high optical quality and durability.
The 49-387-INK lens has a center thickness of 6 mm and an edge thickness of 8.94 mm, providing robustness and stability. The lens's geometry also includes radii of curvature for its three surfaces, specifically r1=279.6 mm, r2=-199.51 mm, and r3=-579.39 mm. These radii contribute to the lens's overall optical performance.
The lens is coated with edm visnir0sp2002000, a proprietary coating from Edmund Optics, on both the front and back surfaces. This coating enhances the lens's transmission and reduces reflection, further improving image quality.
