Description

Visible and NIR laser processing objective lenses are designed for high-precision laser machining, laser micromachining, semiconductor processing, and advanced optical inspection applications requiring exceptional focusing performance across visible and near-infrared wavelengths.

These infinity-corrected objective lenses combine high numerical aperture (NA), long working distance, and advanced aberration correction to support femtosecond lasers, Nd:YAG lasers, and other precision laser processing systems. Optimized for coaxial imaging and laser beam delivery, the objectives enable accurate laser focusing and real-time observation of the processing area during cutting, drilling, welding, marking, and microfabrication operations.

The objective lenses are ideal for laser processing systems operating at visible and NIR wavelengths, including 532 nm and 1064 nm laser platforms commonly used in industrial manufacturing, semiconductor inspection, biomedical imaging, materials research, and precision optical metrology.

The objective lens is also compatible with visible pulsed lasers such as 532 nm sources. The laser damage threshold is:0.1 J/cm² at 532 nm0.2 J/cm² at 1064 nm(measured at a pulse width of 10 ns and repetition rate of 20 Hz).

Benefits of Infinity-Corrected Objective Lenses in Laser Processing

Infinity-corrected objective lenses project collimated light between the objective and tube lens, allowing additional optical components such as filters, beam splitters, scanners, and imaging systems to be integrated without significantly affecting image quality.In laser processing applications, infinity-corrected optics provide greater system flexibility, improved aberration correction, and easier integration of coaxial imaging and beam delivery components. This architecture is widely used in advanced laser micromachining, semiconductor inspection, and optical metrology systems.

Infinity-Corrected Visible and NIR 20x Objective Lenses for Laser Processing

Specifications

Magnification: 20
Numerical Aperture: 0.4
Focal Length: 10 mm
Working Distance: 20 mm
Design Type: Air Immersion
Wavelength Range: Visible, Near Infrared
Weight: 386g
Wavelength Range: 430 - 660 nm and 1064nm
Mount: W26×0.706
Parfocal Distance: 95mm
Object Side Resolution: 0.68um
Depth Of Focus: 1.7um@550nm
Entrance Pupil Diameter: 8mm
Compatible Tube Lens Focal Length: 200mm
Protective Window: 1.8mm
Manufacturer Part Number (MPN): OBJ-20X0.4-NIR-WD20
Manufacturer Part Number (MPN): OBJ-20X0.4-NIR-WD20
FindLight SKU: FL-24790

Got questions about specs? Use the inquiry form to ask.

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Features

  • Infinity Corrected Flat 
  • Field Apochromatic
  • Both VIS and NIR optimized
  • VIS+NIR Broadband AR coating
  • High Transmission at both VIS and NIR
  • High laser damaged threshold
  • Large NA

Applications

Visible and NIR laser processing objective lenses are widely used in laser micromachining, semiconductor manufacturing, biomedical imaging, precision metrology, additive manufacturing, and industrial materials processing applications.

Their high numerical aperture, long working distance, and coaxial imaging capability make them ideal for laser drilling, laser cutting, welding, surface structuring, laser marking, and microfabrication systems operating with femtosecond, picosecond, and Nd:YAG laser sources.

These objective lenses are also commonly integrated into semiconductor inspection platforms, machine vision systems, optical research instruments, and precision laser alignment setups where accurate beam focusing and real-time imaging are required.

Export & Trade Information

ECCN: EAR99
HTS Code: 9002.19.00
Estimated US Tariff: 25%

Importing, tariffs & codes (Quick Guide) →

Frequently Asked Questions

What wavelengths are supported by the 20X VIS/NIR laser processing objective?
This 20X objective is optimized for visible and near-infrared laser applications, with a specified wavelength range of 430–660 nm and 1064 nm. It is suitable for systems using common laser wavelengths such as 532 nm and 1064 nm.
Can this 20X objective be used for laser processing and coaxial imaging?
Yes. The objective is designed for both laser beam focusing and coaxial observation, allowing users to monitor the processing area while delivering the laser beam. It is suitable for applications such as laser drilling, cutting, welding, marking, and micromachining.
What is the working distance of this 20X laser processing objective?
The objective has a 20 mm working distance, providing useful clearance between the objective and workpiece for laser processing setups. Its 20X magnification and 0.4 numerical aperture provide an object-side resolution of approximately 0.68 µm.
What are the laser damage thresholds of this objective?
The specified laser damage threshold is 0.1 J/cm² at 532 nm and 0.2 J/cm² at 1064 nm, measured using a 10 ns pulse width at a 20 Hz repetition rate. Actual system performance can depend on factors such as beam profile, pulse duration, repetition rate, and alignment.
What tube lens is compatible with this infinity-corrected 20X objective?
This infinity-corrected objective is designed for use with a 200 mm focal-length tube lens. Its infinity-corrected optical design produces a collimated beam between the objective and tube lens, allowing components such as beam splitters, filters, scanners, and imaging optics to be integrated into the optical path.

Got more questions? Use the inquiry form to ask the supplier directly.

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