Laser metrology

Laser trackers are instruments that accurately measure large objects by determining the positions of optical targets held against those objects. The accuracy of laser trackers is of the order of 0. Some examples of laser tracker applications are to align aircraft wings during assembly . Modern measurement equipment include hand tools, CMMs (coordinate- measuring machines), machine vision systems, laser trackers, and optical comparators. The term laser originated as an acronym for light amplification by stimulated emission of radiation.

Topics related to precision engineering and manufacturing technology.

Surface primary form, surface fractality and surface roughness are the parameters most commonly associated with the field.

It is important to many disciplines and is mostly known for the machining of precision parts and . In modern engineering, the general meaning of laser scanning is the controlled deflection of laser beams, visible or invisible. One of the first uses of new scientific discoveries is metrological , the laser , the Josephson effect, the quantised Hall effect, Bose-Einstein condensates, new science generates new ways of measurement, new methods of establishing units of measurement, and science itself . Confocal or 3D laser scanning are methods to get information about the scanned surface. Metrology is closely linked to fundamental science.

This machine may be manually controlled by an operator or it may be computer controlled. Included are all areas from everyday life to the most advanced science, e. Interferometry is an important investigative technique in the fields of astronomy, fiber optics, engineering metrology , optical metrology , . The laser interference method works with two wide planar laser beam fronts. The company markets its products and . Their interference in regular, equidistant line patterns. Different pattern sizes can be obtained by changing the angle between these beams.

The method allows for the exact and easy generation of very fine patterns with unlimited depth of . Laser absorption spectrometry has become the foremost used technique for quantitative assessments of atoms and molecules in gas phase. Diffusionmeters using visible light are found in airports or along roads to measure horizontal visibility. Radar scatterometers use radio or microwaves to determine . Renishaw specialises in industrial metrology and spectroscopy and sells its products in the major markets around the world. They are also used in optical parametric oscillators and . Single frequency diode lasers are classed as either distributed feedback (DFB) lasers or distributed Bragg reflector (DBR) lasers.

Due to diffraction, the beam diverges ( expands) . The scanning laser vibrometer or scanning laser Doppler vibrometer is an instrument for rapid non-contact measurement and imaging of vibration. Fields where they are applied include automotive, medical, aerospace, micro system and information technology as well as for quality and production control.