The Model Design Of Artificial Optical Compound Eye And Its Path Planning

With the development of science and technology,optical imaging system has been widely and increasingly used in advanced equipments of national defence and civilian industries, and much higher requirement is needed. Such as smart weapons, intelligent robot vision system and micro air vehicles, expected the whole system weight light, size small, large field of view and the more sensitive to the moving target. However, in recent years the system of mechanical devices and electronic devices has become increasingly difficult to be further miniaturization and much lighter. So many scientists want to reduce the optical system parts in order to make the whole system the lighter weight and further miniaturization. And with the advantages of small volume, light weight, large field-of-view, high sensitivity and measuring speed, the artificial optical compound eye has got more and more attention. The optical compound eye has been researched and lots of results have been made. But the image of the eyes still has some shortcomings. Therefore, how to make further improvement of the optical compound eye imaging properties is becoming particularly important and new challenges to study the compound eyes have been raised.In this paper, firstly, the three-dimensional function of the compound eye's ommatidium can be got through the analysis of artificial optical compound eye by optical theory. The ommatidium is described by higher-order curve, which replace with the high fitting spherical surface array and the imaging features of the outside optical axis part is enhanced. By that way, it overcome the disadvantage that the image is clear in middle but fuzzy in edge with the sphere array and improve the image effect of compound eye.Secondly, by the three-dimensional function of the ommatidium, the point cloud is calculate. The initial grid of ommatidium is generated through Pro / E Reverse engineering. Then the ommatidium model is reconstructed by RecurSurface (Surface Reconstruction) system which is base on Triangle recursive subdivision algorithm and the reconstruction accuracy can catch up with 2nm. The model of the compound eye is reconstructed through the RecurSurface (Surface Reconstruction) system and Pro/E. The overall size of the optical compound eye is 19×17×3mm. The eye is formed by seven ommatidium, and base on the middle one, others rotate 20°around its sides. The eye is assembled by approximate hexagonal ommatidiums, which eliminate the gaps that produced by combination of the spherical ommatidiums, and it overcome the image shortage of"Ma points"which appear when the ommatidiums is sphere. In this way, the imaging characteristics of the compound eye can be further improved.Finally, the processing path and processing parameters are be studied which are very important to processing accuracy of the artificial optical compound eye. And then the NC manufacturing simulation and post processor of the eye model after subdivision are completed adapting the NC machining modular of Pro/E. The G-code of eye is generated. Meanwhile, in order to eliminate the possible errors in the actual processing, the G-code is checked with Vericut soft. After the G-code format is changed to the NC code that the generating PMAC controllers can identify, the eye model is machined by PMAC-based three-axis control machine tool. At last the processing errors are analyzed.