Industrial quality of the lens should be how to judge?
Industrial camera choice will affect the imaging quality of the industrial test, so I need careful judgment, usually from the following several parameters to determine the quality of industrial camera: 1.
Resolution: also called the identification rate and solution as force, refers to the camera's ability to clearly distinguish your subject scenery fiber details, restricting industrial camera resolution is the cause of the phenomenon of light diffraction, the diffraction of light,
In the love spot)
Octavia degrees: also known as contrast, refers to the bright and dark part of the image contrast.
The depth of field: in the scene space, located in the scenery within a certain distance before and after the focus object plane, can form a relatively clear image.
Above in focusing object plane can form a relatively clear images of the depth of the distance between scene, is to gain a relatively clear images on the real image plane depth range of landscape space, called the depth of field.
Large relative aperture and aperture coefficient, relative aperture, it is to point to the industrial scene of the incident light hole diameter (
With the focal length (
The ratio of, i. e. , relative aperture = D/f.
Inverse relative aperture of the known as the aperture coefficient, also known as the f/f-stop coefficient or light hole number.
General relative aperture of lens can be adjusted, the large relative aperture or aperture coefficient often labeled on the industrial scene, such as 1:1.
2 or f / 1.
If the spot light is dark or exposure time is short, you need to try to choose large relative aperture lens larger industry.