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Reviewing some basic operating principles of the aperture.

Release Date:

2021-06-02 13:22

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Reviewing some basic operating principles of the aperture.

　　The aperture diaphragm is manufactured according to the principle of the pinhole imaging phenomenon, and its fabrication requirements are relatively stringent.

　　Accordingly, the material requirements are quite stringent; on the market, Japanese SOMA light‑blocking film is predominantly used—a double‑matte black PET.

　　A light‑blocking ring serves to prevent stray light; for example, it’s used in smartphone camera lenses and other imaging optics. It is a Mylar sheet formed by stamping with SOMA light‑blocking material and then mounted within the lens assembly. Because of its light‑blocking function, it is commonly referred to as a light‑blocking ring or light‑blocking shim. Its operating principle is based on the physical phenomenon of pinhole imaging, and it demands relatively stringent manufacturing tolerances.

　　SOMA light‑blocking rings, light‑blocking sheets, and SOMA light‑blocking Mylar films are used in digital cameras, smartphone lenses, surveillance cameras, automotive lenses, and more. Our company specializes in manufacturing high‑precision metal stamping dies and precision stamping of both metallic and non‑metallic sheet materials. Product dimensional tolerances can be maintained within ±0.005 mm, concentricity is guaranteed to within ±0.01 mm, and we offer ultra‑thin‑wall machining capabilities.

What’s the purpose of the lens hood on a camera?

What is an aperture?

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