48-942 9mm Dia. x -12mm FL; VIS-NIR Coated; Double-Concave Lens 400-1000nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 9 mm
- EFL
- -12 mm
- BFL
- -12.41 mm
- R1
- -19.16 mm
- R2
- 19.16 mm
Material
- Name
- N-SF11
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.7847141030246312
- λ
- 587.6 nm
- B1
- 1.73759695
- C1
- 0.013188707 μm2
- B2
- 0.313747346
- C2
- 0.0623068142 μm2
- B3
- 1.89878101
- C3
- 155.23629 μm2
48-942 9mm Dia. x -12mm FL; VIS-NIR Coated; Double-Concave Lens 400-1000nm
The 48-942 is a double-concave spherical lens, sourced from Edmund Optics, boasting a 9mm diameter and a focal length of -12mm. This lens is designed for use within the visible to near-infrared spectrum, spanning 400-1000nm, making it suitable for a wide range of optical applications.
The lens is constructed from n-SF11 Schott, a high-index glass with excellent transmittance properties in the specified wavelength range. The front and back surfaces of the lens are coated with edm visnir0sp2002000, a broadband anti-reflection coating that further enhances its performance by reducing surface reflections and increasing transmission.
The lens geometry includes an edge thickness of 2.43mm and a center thickness of 1.5mm, contributing to its robustness and durability. The inner and outer radii are both zero, indicating a symmetrical design. The back focal length is -12.41mm, a value that is crucial for determining the correct positioning of the lens within an optical system.
The item data also provides a web link to the vendor's page, where users can find more information about the lens, including its availability and pricing. This link is valid and indicates that the lens is currently in stock, making it readily available for immediate use in optical designs.