The dynamic pattern generator of resolution test target is widely used to evaluate the imaging
quality of the optical system. The dynamic pattern generator is composed of resolution test target and
linear motion device and it can provide uniform motion within 400 millimeters. The resolution test
target is photoengraved on the demands of photoelectric detection system and their patterns are
different to be replaced. The length of the resolution test targets are specially designed to reduce the
difficulty of the time system synchronism. The linear motion device is made of linear motor servo
system. It can implement high speed, high precision and reliable motion. The servo system is designed
with current loop, speed loop and position loop. The current loop and the speed loop are the inner
control loops of the servo system and they can compensate the influence of the power fluctuation and
nonlinear, uncertain factors to lessen the burden of the main loop. The inner loop employs proportion
and integration (PI) algorithm without derivation feedback. The position loop, which belongs to the
outer control loop, adopts proportion, integration and derivation (PID) algorithm and forward feedback
algorithm. The Hall sensors are feedbacks of the current loop, the grating rule is the feedback for both
the speed loop and position loop. The servo system is designed for the speed stability, so the speed is
the control goal. Especially, control of high speed and low speed is implemented by speed and
acceleration forward feedback. The servo system can get the precision of 1%.
The measurement of diopter and optical parallax of optical system is preceded traditionally with collimating device or
diopter cylinder, the result of which is influenced largely by subjective operator. In order to increase the pointing
accuracy of the telescope system, a high resolution CCD is adopted and the image of which is processed by computer,
then the result of measurement is outputted by latter. The measuring method which is processed in the paper increase the
degree of accuracy, cancel the influence of subjective factor and simplified the manipulation. Principle of test and
measurement of diopter and optical parallax is represented and computation formula is deduced also. Then, error analysis
of the test and measurement system is presented in the paper.
This measuring machine is specially designed to solve many parameters of crankshaft for some factory. According to the laser slot scanning principle, non-contact measuring of two axes' parallel degree for crankshaft is realized. The machine use laser technique, photoelectric measuring technique, fine mechanical technique, modern photoelectric sensor technique, electronics technique and computer-technique. And the difficulty which include complex shape, large weight, large size, high request of the measured parameter precision and difficult measuring, is solved.
This paper described a kind of new method and system in dynamic measurement used to measure the diameter of cylinder. Laser prismatic technology, photoelectric sensor technology, fine machine technology, electronics data processing technology and computer figure control technology were used in this system. It was a system integrated with optics, machine and electronics. This system had some characteristics of high precision, high efficiency, real time, on-line, non-contact and automatic measurement.
This paper brings forward a kind of technique of creating photoelectricity imaging automatically with DLP, the technique of CCD photograph and the modern testing method between the technique of computer imaging disposing and the technique of optics system image and graduation lean. This method can remove a lot of vice, which is tiredness of examining method by eyes, the effect of man-made factors, and so on. So it can make measuring, the degree of automatization more veracity, even realize digitalization.