ASL10142-532

• High-precision aspheric lens designed to minimize spherical aberration and provide high-quality optical performance.
• Ø1" (25.4 mm) diameter for integration into standard optical systems.
• 77.8 mm effective focal length (EFL) at 532 nm.
• Numerical aperture (NA) of 0.145 for efficient light collection and focusing.
• Manufactured from UV Fused Silica (UVFS) for excellent optical performance over a broad wavelength range.
• 532 nm V-coating with average reflectance below 0.25% at 532 nm, improving transmission at the design wavelength.
• Diffraction-limited performance at discrete wavelengths from 350–1620 nm.
• High optical surface quality: 20-10 scratch-dig.
• Suitable for laser focusing, beam conditioning, imaging, and optical system integration.

The Thorlabs ASL10142-532 is a high-precision, 1" diameter aspheric lens manufactured from UV-fused silica and optimized for applications operating at 532 nm.

Its aspheric surface is designed to reduce spherical aberration compared with conventional spherical singlet lenses, providing improved focusing performance and high-quality optical output. With an effective focal length of 77.8 mm and a numerical aperture of 0.145, the lens is well suited for applications requiring efficient light collection and precise focusing.

The lens features a 532 nm V-coating with an average reflectance of less than 0.25% at 532 nm, helping to maximize transmission and minimize optical losses at the design wavelength.

The UV-fused silica substrate also provides broad wavelength capability, while the precision-polished optical surfaces offer diffraction-limited performance at discrete wavelengths from 350 to 1620 nm.

Product Type: Aspheric Lens
Part Number: ASL10142-532
Lens Diameter: 25.4 mm (1")
Substrate Material: UV-Fused Silica
Effective Focal Length (EFL): 77.8 mm @ 532 nm
Focal Length Tolerance: ±0.5%
Numerical Aperture (NA): 0.145 @ 532 nm
Working Distance: 73.7 mm @ 532 nm
Design Wavelength: 532 nm
Clear Aperture: >90% of Diameter
AR Coating: 532 nm V-Coat
Average Reflectance: <0.25% @ 532 nm, 0° AOI
Surface Quality: 20-10 Scratch-Dig
Surface Flatness, Plano Side: < λ/10
Surface Irregularity: <1 Fringe RMS
Radius of Curvature Tolerance: 0.10%
Sag Deviation (Power): 2.0 µm
Centration: <3 arcmin
Center Thickness: 6.0 mm
Edge Thickness: 3.5 mm
Approx. Weight: 8 g

The specifications above are based primarily on Thorlabs' optical drawing and product documentation for ASL10142-532.

The ASL10142-532 can be used in a wide range of precision photonics and laser-optics applications, including:

• 532 nm Laser Focusing
• Laser Beam Conditioning
• Laser Beam Collimation
• Free-Space Optical Systems
• Fiber Coupling and Light Collection
• Microscopy and Imaging Systems
• Laser-Based Measurement Systems
• Scientific and Research Optical Setups
• Photonics and Quantum Optics Experiments
• Optical Instrumentation and Custom Optical Assemblies

Aspheric lenses are particularly useful in systems requiring high numerical aperture and reduced spherical aberration, including laser diode collimation and fiber-coupling applications.