The machine vision system has already become the optical mechanical electrical integration products or components of
products in modern equipment manufacturing industry. The new LED is more excellent than the halogen tungsten lamp,
laser and other traditional light source. It is used in machine vision system more and more.
From the analysis of the functional characteristics, this article pointed out the difference between machine vision LED
lighting system and traditional optical instrument lighting system. By the interactive methods which integrate with
synthesis design analysis and Simulation, this paper import the element of field flattening theory into traditional lighting
design, making it a kind of the new flat field lighting system. The effect when it was applied to high power LED lighting
system is good.
With the new design concept, through the interactive design method and the new image quality evaluation system, we
have a contrast experiment on a kind of LED single lamp lighting system. The results show that the field flat lighting
system is superior to the traditional one. The most distinctive feature of the new light system is that, it can improve the
performance of critical illumination system in certain procedures -- poor illumination uniformity performance. This new
lighting optical structure and the new lighting quality evaluation system have broad prospects.
A second parallel CCD (CMOS) imaging system for an telescope objective with the fixed D/f' is
proposed in detail. As a direct imaging system that the CCD target surface coincides with the
imaging surface of the telescope objective, it shows the outstanding performance of more than
doubled resolution compared with the ordinary telescope objective under the same D/f'. Based on
the discussions about the second parallel optical path telescope system, three design examples are
compared and analyzed. The relation between the optical properties of image field and the optical
elements of the second parallel path is clarified, which provides an operable method for readers.
This practice has proved the outstanding performance of the new telescope objective
photoelectronic imaging system which indicates potential applications in broad scientific and
The strong lateral polarization component of radially polarized beam focused by high numerical aperture objective
shows totally axis-symmetrical property, which gives rise to its widely applications in many optical devices. The
equations of vectorial three dimensional(3D) electric field of radially polarized beam focused by high numerical
aperture objective are given based on the vectorial Debye theory. The finite difference time domain(FDTD) method is
applied to simulate the focusing of radially polarized beam. The electric field of radially polarized focal beam in a
defocus plan calculated by Debye theory is induced as input source using the total/scatter field approach. We simulated
the focusing processes in single dielectric medium and through the interface of two dielectric media, respectively. The
distribution of electric field of the focus obtained from the FDTD results coincides with that directly calculated by
Debye theory, which proves the facility of FDTD method for simulating the focusing optical field. Additionally, we
simulate the focusing of radially polarized beam through dielectric half ball shaped nano-holes with different sizes. The
focus shift effect caused by the different sizes of nano-holes provides the mechanism for changing the longitudinal
position and the lateral resolution of the focus in subwavelength scale. At last, the surface plasmons excited by the
radially polarized focus are shown at the surface of the metallic film and form a smaller focus. The simulation results of
this paper will give contribution to the super-resolution focusing for nano-lithography.