49-956 20 mm Dia. N-BAF10/N-SF6 Achromatic Doublet; EFL=25mm VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- 25 mm
- R1
- 18.03 mm
- R2
- -13.27 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
49-956 20 mm Dia. N-BAF10/N-SF6 Achromatic Doublet; EFL=25mm VIS-NIR 400-1000nm
The 49-956 is a high-quality achromatic doublet lens, boasting a 20 mm diameter and a focal length of 25 mm. This lens is designed for use in the visible to near-infrared spectrum, spanning 400 to 1000 nm, making it a versatile choice for a wide range of optical applications.
The lens is composed of two types of Schott glass, N-BAF10 and N-SF6, which are renowned for their excellent optical properties. The use of these materials in a doublet configuration helps to correct chromatic aberration, ensuring sharp, clear images free from color fringing.
The geometry of the lens is carefully designed to optimize its performance. The edge thickness measures 8.06 mm, while the center thickness is 9.5 mm, providing a robust and stable structure. The lens features a concave radius of 18.03 mm on the first surface and a convex radius of -13.27 mm on the second surface, followed by a concave radius of -55.46 mm on the third surface. This complex curvature allows for precise control of light propagation.
The lens is coated with a broadband anti-reflection coating, denoted as 'edm visnir0sp2002000'. This coating is applied to both the front and back surfaces of the lens, reducing surface reflections and increasing transmission in the visible to near-infrared spectrum.
The lens is available from Edmund Optics, a leading provider of optical components. According to the vendor's information, the lens is currently in stock, ensuring quick delivery for your optical project needs.
