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Test methods for laser beam widths, divergence angles and beam propagation ratios General astigmatic beams.
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Test methods for optical properties other than wavefront aberrations. Destruel Ido of publication: This page was last edited on 18 Decemberat Discover also Certification, assessment, diagnosis Get a quote for certification of systems, products or services, and get certified.
Stigmatic and simple astigmatic beams Status: Pruefverfahren fuer Laserstrahlabmessungen, Divergenzwinkel und Beugungsmasszahlen. The simplest way to define the width of a beam is to choose two diametrically opposite points at which the irradiance is a specified fraction of the beam’s peak irradiance, and take the distance between them as a measure of the beam’s width.
If the beam does not fill more than a third of the beam profiler’s sensor area, then there will be a significant number of pixels at the edges of the sensor that register a small baseline value the background value. Terms and Conditions Terms of subscription Online watch.
Beam diameter – Wikipedia
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By using tomographic reconstruction, mathematical processes reconstruct the laser beam size in different orientations to an image similar to the one produced by CCD cameras. Lasers and laser-related equipment – Test methods for laser beam widths, divergence angles and beam propagation ratios – Part 1: Reconstruction is possible for beams in deep UV to far IR.
Click to learn more. The baseline is easily measured by recording the average value for each pixel when the sensor is not illuminated. Retrieved June 3, To overcome this drawback, an innovative technology offered commercially allows multiple directions beam scanning to create an image like beam representation.
The term “beam width” may be preferred in applications where the beam does not have circular symmetry. Unlike other systems, a unique scanning technique uses several different oriented knife-edges to sweep across the beam. Most CCD beam profiler’s software can compute the knife-edge width numerically. The D86 width is often used in applications that are concerned with knowing exactly how much power is in a given area.
Get a quote for certification of systems, products or services, and get certified. Since beams typically do not have sharp edges, the diameter can be defined in many different ways.
By mechanically moving the knife edge across the beam, the amount of energy impinging the detector 1114-61 is determined by the obstruction. For example, applications of high-energy laser weapons and lidars require precise knowledge of how much transmitted power actually illuminates the target. Document s cited in this standard.
Beam diameter is usually used to characterize electromagnetic beams in the optical regime, and occasionally in the microwave regime, that is, cases in which the aperture from which the beam emerges is very large with respect to the wavelength. The fraction of total beam power encompassed by the beam width depends on which definition is used.
Certification of persons Do recognize your skills, register online to become certified. The American National Standard Z You may find similar items within these categories by selecting from the choices below:. Option to visualize changes at a glance. The main drawback of the knife-edge technique is that the measured value is displayed only on the scanning direction, minimizing the amount of relevant beam information. Affiliation 11146-1 of ICS codes.