The iris: The iris is a structure of the eye that is present in most mammals and birds. The function of the iris is to control the amount of light that can reach the retina by controlling the pupil diameter. The colour of the iris is what is referred to when talking ab...
The iris is a disc-shaped diaphragm that is freely suspended within the path of light refraction in the eye. It is perforated by a central opening, the pupil , which is shifted slightly toward the nasal side. The main function of the iris is to regulate the amount of light reaching the...
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...
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1.A muscle that separates the chest cavity from the abdominal cavity. As the diaphragm contracts and expands, it forces air into and out of the lungs. 2.A thin, flexible disk, especially in a microphone or telephone receiver, that vibrates in response to sound waves to produce electrical ...
iris diaphragm- diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening iris diaphragm,stop- a mechanical device in a camera that controls size of aperture of the lens; "the new cameras adjust the diaphragm automatically" ...
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...
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diaphragm i. As applicable to air photogrammetry, a device for varying the amount of light passing through the lens. It is fitted behind, in front of, or between the lenses of cameras. It provides apertures of varying sizes. Any particular size is called astop, and the act of reducing th...
2. Iris Diaphragm with Iris Diaphragm (Iris Diaphragm objective) : there is a rainbow Diaphragm in the upper part of the objective lens barrel, and the outer side also has a rotating adjustable ring that adjusts the aperture size of the aperture when rotating. The objective of this structure...