Laser Beam Profilers Key Features:
Configurable to sample, measure and display cross-sectional profiles and/or 2D and 3D image plots in real time up to 5 Hz. Selectable averaging of 1-20 samples provides noise reduction and maximizes measurement accuracy.
Data can be collected, displayed, stored and continuously streamed to the RS-232 port. All screen images can be captured and stored, or printed to any Windows printer.
BeamMaster can measure focused beam spots as small as 3 µm with 0.1 µm resolution, and has an aperture as large as 9 mm with 1 µm resolution for larger beams. Measurements can be made from 190-1100 nm (Si-Enhanced) and from 800-1800 nm (InGaAs).
Input powers can be as low as 10 µW. There is automatic gain control and an internal distortion-free optical attenuation filter provided (Si models).
Beam Profiles and Widths
On each rotation of the drum, BeamMaster captures and processes the data from the passage of the seven knife edges across the beam (three knife edges with BM-3) as power, position and profile information. This information can be displayed every rotation, strip-charted, sent to file or the RS-232 port.
Two orthogonal profiles can be displayed and the beam widths digitally displayed for any three user-chosen clip levels. A Gaussian-fit profile can be overlaid on any chosen measured profile, and the fit and correlation parameters displayed.
To obtain the maximum profile detail, the system automatically centers the profile and zooms to display ~3 times the beam width, and the profile intensity data is autoscaled (optional) to fit the display height.
Added detail can be obtained in a special high-resolution mode. This is very useful for analyzing beams that are far from Gaussian in shape or smaller than 100 µm.
Beam Position and Ellipticity
The beam centroid position can be continuously monitored relative to the center of the sensor area, along with the beam shape, ellipticity (major and minor axes) and angular orientation. A zoom function is available and the user can choose the clip level and strip chart the position (X and Y) data to monitor short-or long-term, time-dependent stability or drift.
The beam power can be displayed either as a digital readout or in combination with an analog “needle.” Units can be chosen as µW, mW or dBm, and the user can offset the zero and zoom in on any part of the power range. Attenuator (filter) files can be selected and a test range can be selected and displayed to monitor beam power within specific limits,with optional audio alarms.
Data Collection and QA Testing
Not only can beam size, position and power data be continuously displayed in analog, digital and strip chart forms on the computer screen, but they can also be logged to a data file in real time for later processing or test report generation. Pass/Fail testing can be performed on measured results for acceptance within specific tolerances.
Files can be transferred to another computer with an RS-232 link or data can be transferred in real time. In addition, all screen images can be captured and stored as BMP or JPG files or printed to any Windows printer.
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