Aperture diaphragms are crucial components in optical systems. Typically, the aperture diaphragms we refer to are made of stainless steel and are manufactured through a combination of etching and electrophoretic processes. The etched aperture diaphragms have smooth surfaces without bumps, with flatness under 0.1mm. After etching, the diaphragms undergo an electrophoretic process to coat them entirely in black. These optical products are widely used in the field of optics and can be found in microscopes, telescopes, cameras, and various optical instruments in scientific research and hospitals.
Despite their small size, aperture diaphragms play a significant role in the field of optics. Let’s explore the principles behind their importance.
The primary function of an aperture diaphragm is to control the propagation direction of light, adjust the range of light incidence, and regulate the intensity and distribution of light. Specifically, it determines the illumination of the image plane and the field of view of the system. By restricting certain light rays that deviate from the ideal path, the diaphragm helps improve the imaging quality of the optical system and intercepts harmful stray light within the system. This functionality is particularly important for optical instruments such as cameras and spectrometers used in hospitals and research institutes.
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