The image measuring instrument is also known as the precision image surveying and mapping instrument. It overcomes the shortcomings of traditional projectors and is a new high-precision, high-tech measuring instrument integrating optical, mechanical, electrical, and computer image technology. The object to be measured is magnified and imaged by an optical microscope with high magnification. After the image of the enlarged object is sent to the computer through the CCD camera system, it can efficiently detect the contour and surface shape, size, angle and position of various complex workpieces, especially precision Microscopic inspection and quality control of parts.

       According to its projection path, it can be divided into (a) vertical type projector (b) floor type projector (c) horizontal type projector. After the projector and the bulb are energized, the light is filtered through the hot mirror, lens group, worktable, mirror, projection screen, etc., and the contour or surface of the workpiece is enlarged and projected onto the translucent projection screen. Usually, it is necessary to adjust the distance between the workpiece and the projection lens to an appropriate focal length to make the projection screen the clearest condition to ensure the accuracy of the workpiece measurement. The structure of the image measuring instrument can be different from three different measurement systems. If you take a vertical projector as an example, the projection lens can be from 25x to 225x magnification, and there are four common ones: 10x, 20x, 50x, 100x, etc. For measuring the workpiece, contour lighting or surface reflection lighting can be used. Accessories include rotary loading table, dividing head (mechanical or optical), display, V-block, center top frame, lenses of various magnifications (can be replaced at will), projection screen, standard picture, glass ruler and camera Equipment, etc. Image measuring instrument classification: image measuring instrument, two-dimensional image measuring instrument, two-dimensional image measuring instrument, automatic image measuring instrument, automatic image measuring instrument, two-dimensional image measuring instrument, 2.5D image measuring instrument, image mapping instrument, etc. In addition to the general classification of image measuring instruments, as the demand of certain industries increases, special image measuring instruments have appeared on the market, and there are also classification methods such as shaft image measuring instruments and gear image measuring instruments.