49-325 12.5 mm Dia. N-SK11/N-SF5 Achromatic Doublet; EFL=35mm VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 12.5 mm
- EFL
- 35 mm
- R1
- 22.94 mm
- R2
- -15.54 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
49-325 12.5 mm Dia. N-SK11/N-SF5 Achromatic Doublet; EFL=35mm VIS-NIR 400-1000nm
The 49-325 is a high-quality achromatic doublet lens from Edmund Optics, designed for use in the visible (VIS) and near-infrared (NIR) spectrum, specifically between 400 and 1000nm. This lens is characterized by its 12.5 mm diameter and a focal length (EFL) of 35mm, making it suitable for a wide range of optical applications.
The lens is composed of two elements, made from N-SK11 and N-SF5 Schott glass, which are renowned for their excellent optical properties. The first element has a radius of curvature (R1) of 22.94mm, while the second element has an R2 of -15.54mm and an R3 of -58.84mm. The center thickness of the lens is 3.68mm, with an edge thickness of 3.98mm. The lens also features a reduced thickness (Thickness Center A) of 1.5mm at the center, which can be beneficial in certain optical configurations.
The 49-325 lens comes with a broadband anti-reflection coating (VIS-NIR Coated), specifically the EDMM VISNIR0SP2002000 coating, which is applied to both the front and back surfaces. This coating enhances the lens's performance by reducing surface reflections and increasing transmission in the specified spectral range.
In terms of geometry, the lens is circular, and its shape is classified as a multiplet. The item data indicates that this lens is currently in stock, and more information, including pricing and technical specifications, can be found on the Edmund Optics website.
