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What is the principle function of the shading ring?

發布時(shí)間(jiān)：

2023-02-15 14:35

　　The shading ring plays a role of shading, such as the shading ring of the mo¥bile phone lens and the lens shading ring of the camera lens.$ It is a piece of Mylar sheet that is stamped w≥ith SOMA shading material and embedded in the lens. Because of the sh±ading function, everyone calls it Shading ring, shadin'g gasket.

　　Its principle is based on the principle of physical phenomena (small hol↕e imaging), and the processing requirements are relatively strict. Theref ore, the requirements for materia↔ls are also higher-level requirements. The Japanese© SOMA shading material is basically used in the market. It is a doub"le matte black PET.

　　The shading ring on the shading device can be large or sma↔ll. Rotating the sha×ding device can adjus©t the intensity of light. The la rge diaphragm transmits more light to make the field of view♦ bright, and the small diaphragm transmits less light and darkens the field of view; rotate the collimator screwφ to adjust the lens barrel Lifting.

　　The main function of the sha→ding ring

　　1: In the microscope st✘ructure, the adjustment of the lens barrel up and down is the coarse co₩llimation screw, not the shutter, so this option does not m←eet the meaning of the question;

　　2: During the use of the mic‍roscope, the image can be made cle♦arer by adjusting the fine focus screw, so this o∞ption does not meet the meaning of the question;

　　3: In the use of the microscope, ‌the light can be reflected into the light hole by adjusting <the reverse mirror. If the light is we&ak, use a concave mirror, when the light is strongβ, use a flat mirror, so this opti¥on does not meet the meaning of the questioεn;

　　4: In the microscope structure, the light •intensity can be adjusted by adjusting the ₽aperture size of the shutter; when aiming the lig★ht, turn the shutter so that the lβarger aperture is aligned witφh the light hole. If the aperture is& smaller, the field of view is dark. Therefo re, this option meets the meaning of the question;

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