Scanning Slit Beam Profilers for Laser Analysis

BeamMap2 – XYZΘΦ Scanning Slit Beam Profiler

BeamMap2 – XYZΘΦ Scanning Slit Beam Profiler

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Sold by: DataRay Inc. Ships from: United States
Specifications
Detector Type: Si, InGaAs, Si+InGaAs, Other
Wavelength Range: 190 – 2500 nm
Beam Waist Diameter Measurement: Fitted Gaussian and Top-Hat, 1/e^2 Width, User Selectable % Width, Other
M^2 Measurement Capability: Yes
Resolution Accuracy: 0.1 µm or 0.05% of scan range ± < 2% ± = 0.5 µm

Did You Know?

Scanning-slit profilers use a narrow slit instead of a single knife edge. In this case, the intensity is integrated over the width of the slit. The resulting measurement is equivalent to the original cross section convolved with the profile of the slit. Scanning beam profilers are most suitable for beam profiles which are not too far from Gaussian, because the recorded signal is usually integrated in one spatial direction, so that the reconstruction of more structured beam shapes may not be perfect. The advantage of scanning slit beam profiling is sub-micron precision for measuring beam position and size. An important advantage of the concept of scanning is that the photodetector used does not need to have a great spatial resolution, so that detectors for very different wavelength regions can easily be used.

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Frequently Asked Questions

A scanning slit beam profiler measures the spatial intensity distribution of a laser beam by mechanically scanning one or two narrow slits across the beam and recording the transmitted power with a photodetector. As the slit traverses the beam in X and Y, the system reconstructs 1D or 2D beam profiles and computes parameters such as beam width (e.g., D4σ), centroid, ellipticity, and orientation.

What Are Scanning Slit Beam Profilers?

Scanning Slit Beam Profilers are laser beam diagnostic instruments that use a rotating or translating slit to sample the transverse intensity distribution of a beam. As the narrow slit scans through the beam and the transmitted light is detected, the system reconstructs beam width (e.g., 1/e² or second-moment), centroid position, and ellipticity with high dynamic range and low noise.

Unlike camera-based profilers, Scanning Slit Beam Profilers are robust against sensor saturation, scattered light, and damage from high-power beams. They are commonly used for CW and quasi-CW lasers across UV, visible, and IR wavelengths, depending on the detector and slit material.

Typical Specifications and Performance Parameters

When comparing Scanning Slit Beam Profilers on FindLight, review these key specifications:

  • Wavelength range: UV to NIR or MIR coverage, typically specified in nm or µm, matched to your laser line(s).
  • Minimum / maximum beam diameter: Typical ranges from ~50 µm up to several mm, limited by slit geometry and scan aperture.
  • Slit width and spacing: Determines spatial resolution and measurement accuracy for small beams or tightly focused spots.
  • Scan speed / sampling rate: Affects measurement time and suitability for quasi-dynamic beam tuning.
  • Position and width accuracy: Often given as a percentage of beam size plus an absolute term (e.g., µm); critical for alignment-sensitive systems.
  • Input power handling: Maximum CW power or power density at the slit; higher-power beams may require attenuation.
  • Interfaces and software: USB or other digital interfaces, support for beam width standards (ISO 11146), M² calculation, and logging.

Use Cases for Scanning Slit Beam Profilers

Typical applications include laser cavity alignment, beam steering and focusing optimization, quality control in laser manufacturing systems, fiber coupling optimization, and periodic verification of system performance in R&D and production environments.

Buyer Guidance on FindLight

On FindLight you can compare available Scanning Slit Beam Profilers by wavelength range, measurable beam size, accuracy, scan speed, and maximum input power. Evaluate mechanical form factor and mounting options if integration into an optical table or production line is required. For multi-wavelength labs, prioritize models with broad spectral coverage and configurable filters. Once you identify suitable Scanning Slit Beam Profilers, request quotes directly from manufacturers or distributors. No registration is required to contact suppliers, allowing you to quickly obtain pricing, lead times, and technical clarifications for your laser measurement workflow.