5.A disk having a fixed or variable opening used to restrict the amount of light traversing a lens or optical system. [Middle Englishdiafragma, from Late Latindiaphragma,midriff, from Greek,partition, fromdiaphrassein,to barricade:dia-,intensive pref.; seedia-+phrassein, phrag-,to enclose....
English iris, Iris xiphioides - bulbous iris native to the Pyrenees; widely cultivated for its large delicate flowers in various colors except yellow 2. iris - muscular diaphragm that controls the size of the pupil which in turn controls the amount of light that enters the eye; it forms the...
An iris diaphragm includes at least one lens shutter to adjust the size of an aperture that incident light passes through according to movement of the at least one lens shutter. At least one ND filter is installed to move independently of the lens shutter to reduce the amount of incident lig...
Several different types of valves are available in the powder processing industry. One in particular has proven itself time and again as a strong, reliable flow control solution 鈥 the iris diaphragm valve (IDV). The revolutionary design of the IDV is the creative invention fo two rothers ...
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(1) A measuring diaphragm most often is a disk with an aperture. Along with the venturi and the common nozzle, it serves as one of the standard constricting devices used in industry for measuring the rate of flow of liquids, gases, and vapors passing through a pipe, on the basis of the...
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aThe first action of Preprocessing is to determine iris edges include inner (with pupil) and outer (with sclera) edges.Iris can be introduced as follows:a diaphragm with rich texture encircling a circular region (pupil). Both the inner boundary and the outer boundary of a typical iris can ap...
One possible solution [77] of the problem is a computer-generated hologram aligned as a part of a dispersionless 4-fsystem [78]. Assuming that a singly charged OV is encoded in the CGH serving as one diffraction grating of the setup, an iris diaphragm located in the Fourier plane should ...
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