Fugen Automation Tech Co.,Ltd.
11 kinds of industrial camera parameters
1. The focal length ( 焦距) Distance from the center of the lens to glue in the plane formed by the distance between the clear image. The size of the focal length determines the Angle of view, the size of the focal length value is small, Angle is large, the observed range is too big; The focal length value is big, small Angle, observing scope is small. According to the focal length can be adjust, can be divided into two types: prime lens and zoom lens.
2。 Aperture ( Iris) F, said to the lens focal length and the ratio of clear aperture D F to measure. Each maximum F are marked on the lens, such as 8 mm/F1. 4 represents the largest aperture is 5. 7 mm. The smaller the F value, the larger the aperture, the greater the F value, the smaller the aperture.
3。 Corresponding to the largest size of CCD ( 传感器尺寸) Can cover the largest diameter lens imaging CCD chip size. Mainly include: 1/2 ', two-thirds ', 1 ', and more than 1 '.
4。 Interface ( 山) And connection way of the camera lens. Commonly used including C, CS, F, V, T2, Leica, M42x1, M75x0. 75, etc.
5。 The depth of field ( 景深,景深) The depth of field refers to the subject focus after clear object, the object, within a certain distance before and after the image is still clear. Depth of field with the lens aperture, focal length, shooting distance. The smaller the aperture, the greater the depth of field; The smaller the aperture, the greater the depth of field. The longer the focal length, depth of field is smaller;
the shorter the focal length, the greater the depth of field. The more close distance shoot body, the smaller the depth of field; The farther the distance shoot body, the greater the depth of field.
6。 Resolution ( 分辨率) Resolution on behalf of the ability to record details of the object lens, per mm inside can distinguish black and white for the number of units to the line: 'line of/mm' ( lp /毫米) 。 The higher the resolution of lens imaging the clearer.
7, working distance, 工作距离,WD) The lens first face to the distance of the object to be tested.
8, visual field ( 视野FOV) The size of the actual camera captured area.
9, optical magnification ( 放大,ß) CCD/FOV, i. e. , chip size divided by sight.
10, numerical aperture ( Numerical Aperture,NA) Numerical aperture is made by between the object and the lens medium the refractive index n and objective aperture Angle of half ( 一个 2) The product of the value of the sine, the calculating formula for N. A=n*sin a/2。 Numerical aperture and other optical parameters have close relations, it is proportional to the resolution, is proportional to the magnification. That is to say, numerical aperture, directly determines the camera resolution, the greater the numerical aperture, the higher the resolution, or vice versa.
11, back focal ( Flange distance) Precisely, The Times after coke is a parameter of the camera, refers to the distance of the plane from chip camera interface. But online scanning lens or bedding face array camera, model selection of The Times after coke is a
very important parameter, because it directly affect the configuration of the lens. Different manufacturer of camera, even if the interface may also have different times after the coke.
seen above, should know about industrial camera parameters more, so how to choose the industrial camera for you made a very good bedding.