An diaphragm refers to the entity in an optical system that restricts the light beam. It can be the edge of a lens, a frame or a specially designed screen with a hole. Its function can be divided into two aspects: restricting the beam or limiting the size of the field of view (imaging range).
In optical experiments, point light sources or control of light transmission are often required. This can be achieved by using apertures with continuously adjustable apertures. Our company has a large number of adjustable diaphragm blades, with smooth hole diameters, continuous adjustment, compact and beautiful appearance, and is very convenient to use. The greatest advantage of using an adjustable diaphragm for spatial filtering is that it can continuously adjust the size of the center opening, making it easier for some frequency components on the spectral plane to pass through while blocking others, thereby changing the frequency components of the image on the image plane.
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