Photographic optical works

The minimum viewing angle, also known as the visual threshold, refers to the minimum angle that the human eye can distinguish. According to the limit theory of visual resolution, the minimum viewing angle is about 0.000 1 radian, and the relevant knowledge is as follows:

1, this limit comes from the receptor resolution theory and is based on the physiological characteristics of cone cells and rod cells on the retina. Cone cells and rod cells are two kinds of photosensitive cells in the eye. Cone cells are mainly distributed in the central area of retina, and are responsible for color vision and high spatial resolution vision.

2. Rod cells are mainly distributed in the peripheral area of retina and are sensitive to light, but they do not have the ability to distinguish colors. According to the receptor resolution theory, the minimum viewing angle depends on the physiological characteristics of cone cells and rod cells. Specifically, the minimum viewing angle is determined by the distribution density of cones and the sensitivity of rods.

3. The higher the distribution density of cone cells on retina, the smaller the minimum angle that human eyes can distinguish. At the same time, the sensitivity of rod cells will also affect the minimum viewing angle. In practical application, the minimum viewing angle is a very important parameter.

4. For example, in military reconnaissance, aerial photography, medical imaging and other fields, it is necessary to use high-precision image sensors and optical systems to ensure the clarity and resolution of images. In addition, the minimum perspective is also related to the research in the fields of visual psychology and visual cognition.

The Origin of Vision Resolution Limit Theory

1, the theory of visual resolution limit, or receptor resolution theory, was put forward by scientists when exploring the working mechanism of human visual system. This theory tries to explain the lowest visual resolution that human eyes can achieve when observing the world.

2./kloc-In the 9th and early 20th centuries, scientists discovered some interesting facts about the visual resolution limit through experiments and research on human and animal eyes. They found that when we observe an object, our eyes don't "see" every detail of the object directly.

3. The main idea of visual resolution limit theory is that our eyes can only distinguish those objects with sufficient contrast. In other words, if the size of the details or features of an object is less than the visual resolution limit of our eyes, then we will not be able to see the details of the object.

4. The development of visual resolution limit theory also has many contributions from scientists. For example, German physicist Herman Helmholtz discussed the resolution limit of human visual system in detail in his book Handbook of Physiological Optics.