1. Chromatic aberration
Chromatic aberration is a serious defect in lens imaging, occurs in the case of multi-color light as a light source, monochromatic light does not produce chromatic aberration. White light from the red, orange, yellow, green, blue, blue and purple seven kinds of composition, the wavelength of various kinds of light is different, so in the refractive index through the lens is also different, so that the object side of a point, in the image of the side may form a color spot.

2,Spherical aberration

3,Hysteresis
Wisdom aberration is the monochromatic phase difference of off-axis point. When the off-axis object point is imaged with a large-aperture beam, the light beam emitted through the lens no longer intersects a point, then the image of a point of light will get a comma shape, such as a comet, so it is called "coma".

4, like scattering
Like dispersion is also affecting the clarity of the off-axis point of monochromatic phase difference. When the field of view is very large, the edge of the object point away from the optical axis, the beam tilted large, after the lens is caused by like scatter. Scattering makes the original object point in the imaging into two separate and perpendicular to each other after the short line, in the ideal image plane after the synthesis, the formation of an oval-shaped spot. Image dispersion is eliminated by a complex combination of lenses.

5, field curvature

6, aberration