The Chinese National Steering Committee of Optics and Photonics (CNSCOP) is appointed by the ministry of education of China. The members of the committee are selected from 18 representative domestic Universities, 4 Chinese Academic Institutes and major enterprises. Through designing National high education standards for optic and Photonics; establishing Teacher’s training Center; Organizing National annual conference on Optics and Photonics education; setting up the Optics and Photonics Teaching Resource Sharing Platform etc., the CNSCOP has developed many process in order to improve the Chinese optical education quality and to promote the high achievements of students for whole country. In this paper, we will give brief introduction of all these activities.
In order to realize the sharing of high quality course resources and promote the deep integration of ‘Internet+’ higher education and talent training, a new on-line to off-line specialized courses teaching mode was explored in Chinese colleges and universities, which emphasized different teaching places, being organized asynchronously and localized. The latest progress of the Chinese National Optical Education Small Private On-line Course (CNOESPOC) system set up by Zhejiang University and other colleges and universities having disciplines in the field of optics and photonics under the guidance of the Chinese National Steering Committee of Optics and Photonics (CNSCOP) was introduced in this paper. The On-line to Off-line (O2O) optical education teaching resource sharing practice offers a new good example for higher education in China under the background of Internet +.
The reproduction of computer-generated hologram (CGH) with white light source was realized using a liquid crystal panel instead of holographic film. The Burch-coding CGH was achieved by simulating the interference of a digital image and virtual reference light, displayed on liquid crystal displays and illuminated by a white light-emitting diode. The system is compact and the reconstructed images include full parallax. The full-parallax images of the Fresnel hologram computed with our algorithm were compared with the reproduced images by the rainbow hologram. The results implied this method was ready for the development of real-time three-dimensional color digital holography.
A new fast algorithm using the “host” Fresnel zone plate was proposed to improve the computational efficiency of computer-generated hologram (CGH) for 3D objects. By reading .3DS files, the spatial position information of each point of the 3D object was obtained directly. With the illumination of plane wave, the “host” Fresnel zone plate of a single point could be equal to all points located in the same depth plane - as the Fresnel zone plate was translated and superimposed along the horizontal and vertical axes. Consequently, the hologram of a 3D object could be built up by superimposing different Fresnel zone plates in the corresponding depth planes. For a digital object composed of 1060 points, it cost about 83s to generate a hologram of 1024*768 pixels. The CGH of 3D objects with the results of the reconstruction was presented in this paper, which proved the feasibility of this algorithm.
In this paper the research of the real-time three-dimensional holographic imaging system which uses liquid crystal panels to display the computer generated Fresnel holograms for reconstructed 3D images is described. The reconstructed effects are related to each step of the process and the characteristics of the devices. The contradictions between the quantization of holographic numerical data and the properties of the display device are the important reasons for the reconstruction errors. A new algorithm for calculating point holograms is proposed for reducing the reconstruction errors. Finally the original experimental result is given.
Since present display technology is projecting 3D to 2D, people's eyes are deceived by the loss of spatial data. So it's a revolution for human vision to develop a real 3D display device.
The monitor is based on emissive pad with 64*256 LED array. When rotated at a frequency of 10 Hertz, it shows real 3D images with pixels at their exact positions. The article presents a procedure that the software possesses 3D object and converts to volumetric 3D formatted data for this system. For simulating the phenomenon on PC, it also presents a program remodels the object based on OpenGL. An algorithm for faster processing and optimizing rendering speed is also given.
The monitor provides real 3D scenes with free visual angle. It can be expected that the revolution will bring a strike on modern monitors and will lead to a new world for display technology.
Through careful consideration of key factors that impact upon voxel attributes and image quality, a volumetric three-dimensional (3D) display system employing the rotation of a two-dimensional (2D) thin active panel was developed. It was designed as a lower-cost 3D visualization platform for experimentation and demonstration. Light emitting diodes (LEDs) were arranged into a 256x64 dot matrix on a single surface of the panel, which was positioned symmetrically about the axis of rotation. The motor and necessary supporting structures were located below the panel. LEDs individually of 500 ns response time, 1.6 mm×0.8 mm×0.6 mm external dimensions, 0.38 mm×0.43 mm horizontal and vertical spacing were adopted. The system is functional, providing 512×256×64, i.e. over 8 million addressable voxels within a 292 mm×165 mm cylindrical volume at a refresh frequency in excess of 16 Hz. Due to persistence of vision, momentarily addressed voxels will be perceived and fused into a 3D image. Many static or dynamic 3D scenes were displayed, which can be directly viewed from any position with few occlusion zones and dead zones. Important depth cues like binocular disparity and motion parallax are satisfied naturally.