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The term goniometry derives from two Greek words, γωνία 'angle' and μέτρον 'measure'. [1] The protractor is a commonly used type in the fields of mechanics, engineering, and geometry. The first known description of a goniometer, based on the astrolabe , was by Gemma Frisius in 1538.
A Goniophotometer is a device used for measurement of the light emitted from an object at different angles. [1] The use of goniophotometers has been increasing in recent years with the introduction of LED -light sources, which are mostly directed light sources, where the spatial distribution of light is not homogeneous. [ 2 ]
The device would measure the hand, and the numbers needed to match the punched holes of a user ID card to activate the circuit to be identified. David Sidlauskas was also a major player in the hand geometry device production, and he patented Handkey ID3D, the first hand scanner that worked in 3D that involved an optical measuring plate, camera ...
Some hand-based measurements, including the finger. A chart of Imperial and US customary units. A finger (sometimes fingerbreadth or finger's breadth) is any of several units of measurement that are approximately the width of an adult human finger. [Exactly which part of the finger should be used is not defined; the width at the base of ...
Analog and traditional devices to measure range of motion in the joints of the body include the goniometer and inclinometer which use a stationary arm, protractor, fulcrum, and movement arm to measure angle from axis of the joint. As measurement results will vary by the degree of resistance, two levels of range of motion results are recorded in ...
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A positioning goniometer or goniometric stage is a device used to rotate an object precisely (within a small angular range) about a fixed axis in space. Its appearance is similar to that of a linear stage .
Goniophotometry or goniometric optical scatter measurement is the technique of measuring the angular distribution of light, possibly wavelength-dependent, scattered from a surface. Goniophotometry is used to measure intensity distributions from lamps and luminaries and to evaluate the gloss of paints and other surface finishes.
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