CHANCCTV-OPTICSLENS

Pinhole lenses are extremely compact—typically featuring apertures of only a few millimeters—and possess exceptional covertness. They are frequently concealed within the minute crevices of everyday objects—such as nail holes in walls, electrical outlets, or decorative items—allowing them to be deployed in key surveillance zones without detection, thereby ensuring the continuity and integrity of the monitoring process. It is evident, therefore, that while pinhole lenses achieve covert deployment through their extremely compact size, they inherently face optical limitations—such as limited light intake, a narrow field of view, and a high risk of distortion. When applied in security surveillance, ensuring adequate monitoring quality typically requires addressing these limitations through several key approaches: 1. Optical design optimization The covert nature of pinhole lenses relies primarily on their small aperture and short focal length; however, their inherent optical limitations mus...

A fisheye lens is a special type of wide   angle lens. Due to its extreme optical characteristics, it can create unique visual effects that cannot be achieved with conventional lenses. Fisheye lenses provide an important tool for storytelling and visual creativity and is extremely powerful and expressive in film and television production. Fisheye lenses are characterized by an extremely short focal length and pronounced barrel distortion; in film and video production, their visual effects primarily manifest in the following ways: 1. Extreme field of vision and sense of distortion Fisheye lenses typically offer an angle of view reaching 180°—or even wider—enabling them to capture a nearly panoramic perspective and encompass an extremely vast scene situated directly in front of the lens. At the same time, objects in the center of the image will bulge outwards, and straight lines at the edges will become curved lines, creating a strong distortion effect. In film and television produc...

Specific Applications of Varifocal Lenses in Security Surveillance : Varifocal lenses are widely utilized in security surveillance and constitute a vital component of monitoring systems. They can flexibly adjust the focal length and field of view, enabling switching between long-distance monitoring and close-up detail capt