AL2550M-A 25 mm Dia. N-BK7 High-Precision; CNC Polished Aspheric Lenses; EFL=50 mm; NA=0.23 AR 350-700nm
- Type
- Lens
- Subtype
- Aspheric Lens
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 50 mm
- R1
- 25.56 mm
- R2
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5111833144579327
- λ
- 780 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
AL2550M-A 25 mm Dia. N-BK7 High-Precision; CNC Polished Aspheric Lenses; EFL=50 mm; NA=0.23 AR 350-700nm
The AL2550M-A is a high-precision asperic lens offered by Thorlabs, a leading global manufacturer of photonics equipment. This lens, with a diameter of 25 mm, is made from N-BK7, a popular glass type known for its excellent optical properties and high damage threshold.
The lens features an effective focal length (EFL) of 50 mm, making it suitable for a wide range of applications that require moderate magnification. The asphere design, combined with CNC polishing, ensures high-quality imaging with minimal spherical aberration.
The lens has a numerical aperture (NA) of 0.23, which is a measure of the lens' light-gathering ability. A higher NA allows for greater resolution and light collection, making this lens ideal for applications that require high-resolution imaging or where light throughput is a concern.
The lens is coated with an anti-reflective (AR) coating, specifically designed for the 350-700nm wavelength range. This coating reduces surface reflections, improving transmission and enhancing the overall performance of the lens.
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