Aberration is one of the important factors affect the image quality, the different industrial camera image quality is not the same, even if is to use the same type of industrial camera, also because of machining precision, the relationship between the lens structure and material, makes the quality of the captured images to change.
Because of this industrial camera price from one hundred yuan to ten thousand yuan.
We in the industry choice, the first thing to consider is aberration, it is one of the important factors affect the imaging quality, common industrial lens aberration has the following six kinds: 1, the spherical aberration: from a physical point on the spindle to monochrome cone beam from the optical system, after the refraction optical series, if the original beam different aperture Angle of the light, not to the same location on the main shaft, so that an ideal image plane on the spindle, forming a dispersion spot (
Commonly known as fuzzy rings)
This optical system imaging error is called the spherical aberration.
2, poor hui: from the outside of the main shaft one axis object point, to the optical system of monochromatic cone beam, after the series of optical refraction, if reasonable imagine plane can't form a clear point, but the form drag hui star light, bright tail of this optical system imaging error called hui.
3, like: from the outside of the main shaft one axis object point, slice the monochrome cone beam to the optical system, after the refraction optical series, can't form a clear image point, and can only form a diffuse light, this optical system imaging error called astigmatism.
4, a: object perpendicular to the plane of the main shaft by the optical system formed by the clear image, if not a like a plane perpendicular to the main shaft, and in a spindle for symmetric curved surface, namely the best image plane to a surface, then this image error of optical system is called a song.
When the focus to the center of images, the image blur around the picture;
And when the focus to place around the image clear picture, picture the image of the central place began to blur.
5, distortion: subject plane outside the main shaft of a straight line, after the optical system imaging into curve, then the image error of optical system known as distortion.
Geometry distortion aberration affects only image, without affecting the sharpness of the image.
This is distortion and spherical aberration, coma makes, astigmatism, and the fundamental difference between a song.
6, color difference: the white object to the optical system with a beam of white light, the optical system after refraction, the light cannot converge on point, and form a color like spot, known as chromatic aberration.
The causes of the color is the same the refractive index of optical glass for different wavelength of light, short wave optical refractive index, long wave refractive index is small.