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Multiple Scanning Knife-Edge Beam Profiler

Multiple Scanning Knife-Edge Beam Profiler
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Multiple Scanning Knife-Edge Beam Profiler - 1

1160 Phone: 1-800-222-6440 • Fax: 1-949-253-1680 L i g h t Te s t a n d M e a s u r e m e n t s I n s t r u m e n t s BEAM ANALYSIS POWER AND ENERGY METERS DETECTORS Multiple Scanning Knife-Edge Beam Profiler The KEP Series Laser Beam Analyzers are an extension to our laser beam profilers, producing the 3D intensity reconstruction from CCD cameras, while being capable of measuring very small spots at high resolution and huge dynamic range. The measurement technique is based on a multiple scanning knife-edge technology, combined with a tomographic image reconstruction for the creation of the 2D/3D display. When the drum spins, the knife-edges cut across the beam in an orthogonal plane to the direction of propagation. A stationary large detector inside the spinning drum measures light intensity. For attenuation, when needed, a built-in distortion free optical filter is inserted between the spinning drum and the detector. Each scanning knife-edge is oriented at a different angle on the drum and moves across the beam path in a different direction as the drum rotates. Consequently, during a single rotation of the drum, the instrument generates a set of profile curves, each representing the intensity profile of the beam from a different direction. This data is the input for the tomographic reconstruction algorithm to generate the 2D/3D intensity profile of the beam. The Beam Analyzers are offered in two types of measuring heads: Model KEP-7 uses seven individual knife-edges, providing more accurate measurement of the true beam shape and dimensions by gathering data from all 7 scans, while Model KEP-3 uses only three knife-edges, and are recommended for smaller beam as well as for near-Gaussian beam measurements. The more knife-edges, the greater the level of detail obtained. For a beam distribution that is significantly non-Gaussian the KEP-7 would reconstruct a plot that closely matches the real beam profile. • Graphical presentation of a laser beam in 2D/3D. • Beam width, ellipticity, position and power measurements • Wavelength range of 400 nm to 1800 nm (3 optional sensors) • High dynamic range of 100,000:1 • Real-time monitoring Applications • Beam alignment • Online monitoring • Gaussian fit analysis • Beam position measurement • Laser beam optimization and quality control Specifications Model KEP-3-UV/KEP-7-UV KEP-3-SL/KEP-7-SL KEP-3-IR3/KEP-7-IR3 KEP-3-IR5/KEP-7-IR5 Detector Type Silicon, UV Enhanced Silicon Indium Gallium Arsenide Indium Gallium Arsenide Detector Size (mm) 10 x 10 mm 10 x 10 mm ø3 mm ø5 mm Spectral Response (nm) 190 - 1100 350 - 1100 800 - 1800 800 - 1800 Beam Width Resolution (ìm) 0.1 and 1.0 (<100 ìm beams and >100 ìm beams, respectively) Beam Width Accuracy (%) ±2 Power Measurement Accuracy (%) ±5 and ±10 % of reading (for UV/SL and IG versions, respectively) Power Range 10 ìW to 1 W and 10 ìW to 5 mW (for UV/SL and IR versions, respectively) Saturation Power 0.1 W/cm2 without filter, 20 W/cm2 with NG9 filter (UV & SL version only) W Resolution, Power (ìW) 0.1 Position Accuracy (ìm) ±15 Position Resolution (ìm) 1 Sampling Rate (Hz) 5 Computer Interface 12-Size P&P PCI Card Computer Requirements (Minimum) Pentium III, 128MB RAM, 10MB free HD, 8MB AGP card, CD ROM, 12-PCI slot, 98/ME/NT 4.0/2000 or XP Weight (g) 56

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Multiple Scanning Knife-Edge Beam Profiler - 2

1161 DETECTORS POWER AND ENERGY METERS BEAM ANALYSIS L i g h t Te s t a n d M e a s u r e m e n t s I n s t r u m e n t s Email: sales@newport.com • Web: newport.com Additional Benefits • PCI computer interface and Windows-based application software • 3-Blade or 7-Blade systems to optimize for resolution and beam size • Chart mode to monitor beam width or position vs. time • Extensive software features • Pass/Fail testing can be performed on measured results for acceptance within specific tolerances. • Data logging to a Text or to an Excel file • Live Snapshot files replay for complete...

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