The principle of three-dimensional printing is to simulate the distance between the two eyes of a person. When shooting from different angles, the left and right pixels are recorded on the photosensitive material. When viewing, the left eye sees the left pixel, and the right eye sees the right pixel. According to this principle, the printed matter produced is called stereoscopic printing. Three dimensional printing has the following characteristics: (1) it can reproduce the object realistically and has a strong three-dimensional sense. The products have clear images, rich levels, vivid images and profound artistic conception; (2) the original of three-dimensional printing is often made by modeling design or scenery shooting, while the printed materials are generally printed with high-quality coated paper and high-temperature resistant ink, so the glossiness is good, the color is bright, and it is not easy to fade; (3) The printing product surface is covered with a concave convex cylindrical mirror grating plate, which can directly view the three-dimensional effect of panoramic picture. From the perspective of people's stereovision of objects, the stereovision of objects is mainly from human physiological factors, experience and psychological factors. In fact, stereo vision is a kind of stereoscopic information formed by integrating these complex factors in the process of vision. In terms of physiological factors, there are parallax (binocular disparity and monocular movement disparity), divergence and accommodation. Specifically speaking, binocular parallax is the fundamental factor for people to obtain stereo vision, that is, in daily life, when people observe objects, due to the angle of view between the two eyes and other reasons, the object images seen by the left and right eyes will be different, namely parallax, which gives people a three-dimensional sense. The effect of stereo image must be reflected by display technology. The stereoscopic display here refers to the reproduction of three-dimensional information of an image, which is another basic condition for obtaining stereovision. There are two methods to realize stereoscopic display, namely two-way display and multi-directional display. (1) Two way display. It can be divided into three-dimensional mirror method, two-color filter method, polarized light filter method and alternate segmentation method. No matter which method is adopted, stereo vision is obtained by observing the image with the left eye and the right eye with the parallax of two eyes. Stereoscopic method: the basic principle of stereoscopic method is to use stereoscope to observe the left and right graphics to form a stereoscopic sense. This method has been widely used since its appearance in the 19th century, but special stereoscope must be used, otherwise there will be no stereo vision. Two color filter method: the left and right images are printed in the same plane with red and blue ink respectively, and the printed images are observed through red and blue filters. Because the color filter and ink complement each other, the image observed through the filter is not red and blue, but black. Therefore, this method is limited to black-and-white photos and is not suitable for color printing. In addition, different wavelengths of light into the two eyes, easy to make eye fatigue. Therefore, this method is rarely used except for making aerial maps. Polarizing filter method: the left and right images are projected on the same plane through mutually orthogonal polarizing filters, and the left and right eyes are observed with the same polarizing filter. Although this method needs special glasses, it has been widely used in stereoscopic film and stereoscopic television. Alternating segmentation method: the left and right images are alternately presented on the same plane, and the unnecessary parts of the same period are covered, so as to produce a three-dimensional sense. Due to the flash caused by the residual image and the high price of glasses for shielding, this method has not been widely used. (2) Multi direction display method. There are mainly parallax shielding method and cylindrical lens method. Parallax shielding method: parallax shielding method, also known as parallax slit method, was invented by f.e.lves in 1930. Its working principle is that the left eye image and the right eye image are segmented by the slit and exposed on the film, and then developed, printed and printed. If it is placed in the same position in photography, the two eyes are also placed in the position where the image is placed, the stereo image can be seen. If the two images are combined by parallax slit method, the parallax stereo image can be obtained. If the opening ratio of the slit is reduced, multiple images can be synthesized and the parallax panoramic image can be obtained. In essence, the decrease of light quantity is inevitable. Therefore, it is seldom used except in cylindrical lens photography. Cylindrical lens method: cylindrical lens can be regarded as a lens plate composed of many convex lens plates side by side, which has the function of image separation. The back of the lens coincides with the focal plane. Due to the image splitting function of lens, the images a, B, C and D in all directions can be separated into a, B, C and D and recorded on the focal plane. As long as the left and right eyes are placed at the position of B and C, the stereoscopic image can be seen. Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, the world's manufacturing city, is a subsidiary of Beite packaging (China) Co., Ltd., with a plant area of 6000 square meters. It is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of domestic advanced production equipment, a scientific and humanized management system and a group of experienced technical personnel For backing, to provide customers with quality products and first-class service.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for the internal and external packaging of food, daily chemicals, electronics, toys, medicine, cosmetics, industrial products and other industries.
We uphold the integrity of cooperation, good quality, good service business philosophy, won the industry's approval, products sold to all over the world; welcome friends from all walks of life to inquire, visit our factory to investigate guidance and business negotiations.