49-493 25mm Dia. x 75mm FL; NIR I Coated; Double-Convex Lens NIR I 600-1050nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 75 mm
- BFL
- 73.84 mm
- R1
- 76.66 mm
- R2
- -76.66 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5167984379050088
- λ
- 587.6 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
49-493 25mm Dia. x 75mm FL; NIR I Coated; Double-Convex Lens NIR I 600-1050nm
This is a 25mm diameter by 75mm focal length double-convex lens, specifically designed for use in the near-infrared (NIR) spectrum. The lens is sourced from Edmund Optics and is currently in stock. It is made from n-BK7 Schott, a popular optical glass due to its excellent optical properties and chemical durability.
The lens features a standard NIR I coating on both the front and back surfaces, which enhances its performance in the 600-1050nm wavelength range. This coating reduces surface reflections, increases transmission, and improves overall image quality.
The geometry of the lens includes a center thickness of 3.5mm and an edge thickness of 1.45mm. The front and back radii of curvature are 76.66mm and -76.66mm respectively, resulting in a back focal length of 73.84mm. The lens has a spherical shape, which is the most common and simplest type of lens surface.