Camera and lens represent convex lens and light screen respectively

Camera and lens represent convex lens and light screen respectively because the camera lens is a convex lens, the scene to be photographed is the object, and the film is the light screen

What is the principle of the camera: Photographer The textbook clearly states that the imaging principle of a camera is just one word - small hole imaging! The aperture controls the amount of light entering through the aperture, the shutter controls the exposure time through the opening speed, and the combination of the two controls the exposure of the film (film). In the case of photosensitivity, the photochemical reaction of silver halide (the main component of photosensitive film) produces light and dark changes to record images. The imaging principle of digital cameras is the same as that of traditional cameras. The light reflected by the object is refracted through the lens.

An image is formed behind the shutter, and the image can be adjusted by adjusting the amount and time of light passing through the lens. Digital cameras differ from traditional cameras in that they use CCD (Charge Coupled Device) & COMS (Complementary Metal Oxide Semiconductor) ) replaces film to collect images, and uses an LCD display to display the collected images to you immediately, while traditional cameras cannot be seen until they are developed, but the imaging principle is the same.