Knowledge sharing of magnification of two-dimensional image measuring instrument

　　 The magnification of two-dimensional image measuring instrument includes two aspects: optical magnification and digital magnification. The magnification based on the principle of geometric imaging is called optical magnification, which is displayed after electronic circuit processing. Magnification is called digital magnification.

　　The optical magnification is the magnification that the object is imaged onto the photosensitive unit of the CCD through the lens. This part is pure optical imaging and obeys the principle of geometric optics. The optical magnification partly determines the magnification of the image and partly determines the field of view that the CCD can see.

　　Digital magnification is the magnification effect produced by the CCD photosensitive unit through the processing circuit to display the image on the display is called digital magnification. The table shows the magnification ratio from CCD to display. Commonly used CCD sensor chip sizes are 1/3, 17 Amplification is the process of image enlargement when the image is transmitted through the digital signal to the display. The magnification from the size of the object to the size of the image is called the image magnification. The magnification calculation formula of the two-dimensional image measuring instrument is as follows: image magnification u003d optical Magnification×Digital Magnification.

　　 The knowledge about the magnification of the second-dimensional image measuring instrument is simply shared here. For more knowledge about the image measuring instrument and automatic image measuring instrument, please pay attention to Miaoji Precision news or call for consultation.