China philosopher is regarded by western historians as a pioneer in the theory and practice of photographic optics.

China philosopher Mo Zhai is regarded by western historians as a pioneer in the theory and practice of photographic optics.

In the world photography history, China ancient philosopher Mo Zhai (Mozi, about 480-389 BC) is recognized as the pioneer of photographic optics theory and practice. Mozi, a hundred schools of thought contended during the Spring and Autumn Period and the Warring States Period, discovered the pinhole imaging principle that light can form an inverted image through a pinhole for the first time through optical experiments, which is the first scientific explanation recorded in human history about the propagation of light along a straight line.

The law of light propagation:

1, the law of straight-line propagation of light in a uniform medium, that is, in a uniform medium, light is a straight line. The phenomenon of linear propagation of light can be seen anytime and anywhere in daily life, such as objects turning into shadows after being irradiated by light, pinhole imaging and so on. The linear propagation of light leads to the concept of light.

2. The Law of Independent Propagation of Light The propagation of light is independent. When different rays pass through a certain point in the medium from different directions, they do not affect each other. When two rays converge at a certain point in space, its function is simply superposition. This characteristic of light makes the light from all points of the object enter the camera lens without affecting each other, forming an image on the imaging plane.