49-359-INK 25 mm Dia. N-SK11/N-SF5 Achromatic Doublet; EFL=85mm VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 85 mm
- R1
- 55.68 mm
- R2
- -38.37 mm
Material 1
- Name
- N-SK11
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5658215515592446
- λ
- 550 nm
- B1
- 1.17963631
- C1
- 0.00680282081 μm2
- B2
- 0.229817295
- C2
- 0.0219737205 μm2
- B3
- 0.935789652
- C3
- 101.513232 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
49-359-INK 25 mm Dia. N-SK11/N-SF5 Achromatic Doublet; EFL=85mm VIS-NIR 400-1000nm
The 49-359-INK is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a diameter of 25 mm, is designed for use in the visible to near-infrared spectrum, spanning 400-1000nm. The lens is specifically designed for use in multiplet configurations, making it an ideal choice for complex optical systems.
The lens features a focal length of 85mm, providing a balanced compromise between field of view and focus. The geometry of the lens is meticulously designed, with an inner radius of 0 and an outer radius of 0, ensuring minimal distortion and high-quality image reproduction. The lens has a thickness of 6.05mm at the edge and 5.01mm at the center, providing robustness and stability.
The 49-359-INK is composed of two types of glass, N-SK11 and N-SF5, both from Schott. These glasses are carefully selected for their optical properties, contributing to the lens's excellent chromatic correction and high-quality imaging. The lens is coated with EDm VIS-NIR 0SP2002000 on both the front and back surfaces, enhancing its transmission capabilities and durability.
