To understand three-dimensional printing, we must first understand the types and principles of three-dimensional imaging.
1. Two-way display method
The two-way display method mainly includes the following:
(1) Stereoscopic imaging: The basic principle is to observe the left and right figures with the aid of a stereoscopic mirror to form a three-dimensional sense. This stereoscopic mirror is a special stereoscopic mirror, and the general stereoscopic mirror is not easy to produce stereoscopic vision.
(2) Color filter imaging: In color photography, the role of the color filter is to balance the color temperature.
â‘ Types of color filters: color conversion, color compensation (ie CC mirror), ultraviolet rays (ie UV mirror), soft lens, close-up lens, neutral gray filter and color filter for fluorescent lamp, etc.
â‘¡ Imaging principle: Take the two-color filter as an example. Its imaging principle is to print the left and right images on the same plane with red and blue ink, and then observe the printed image through the red and blue filters. Two-color filters are not widely used for two main reasons:
a. The wavelengths of the red and blue color filters are different, which can easily cause eyestrain.
b. Since the color filter and the ink are complementary to each other, the image observed with the color filter is black by the principle of subtractive color method. Therefore, this method is limited to black and white photographs and is not suitable for color prints. This limits the use of color filters to some extent.
(3) Polarized filter imaging: The imaging principle of the polarized filter is to project the left and right images on the same plane through the polarized filters that are orthogonal to each other, and the left and right eyes are also observed with the same polarized filters.
This method is used for the imaging of stereoscopic movies and stereoscopic TVs. They all require special glasses equipped with polarizing filters to observe. Because the imaging effect is good, the observation is convenient, and the application is relatively wide.
(4) Alternate segmentation imaging: Alternate segmentation imaging is to alternately present left and right images on the same plane, while shielding unnecessary parts, and viewing the parallax of the left and right images by two eyes to obtain a stereoscopic effect.
Alternate segmentation imaging has not been popular so far, for two reasons:
â‘ The afterimage effect will cause flash.
â‘¡The glasses used for masking are expensive.
2. Multi-directional display method
The multi-directional display method mainly includes the following two types:
(1) Parallax masking imaging: The principle of parallax masking imaging: the left and right eye images are divided by slits, and then the images are exposed on the film, followed by development, printing, and finally printing. You can see the stereoscopic image by placing the printed matter at the position where you took the picture and placing your eyes at the position where you placed the image.
(2) Cylindrical lens imaging: the lens of the cylindrical lens has a split-image effect. The lens method can continuously shoot within an effective angle, and a three-dimensional image can be obtained at a time, but it is very difficult to zoom in after shooting. Since the cylindrical lens has a long imaging exposure time and cannot take pictures of moving objects, it is necessary to take pictures while moving, and then combine the images in all directions through the cylindrical lens.
Outdoor furniture refers to furniture used for outdoor environment, mainly used for outdoor leisure, entertainment and dining activities. The classification of outdoor furniture can be divided according to the material, function and shape.
First, classification by material
1. Wooden outdoor furniture: Wooden outdoor furniture is usually made of natural wood, such as teak. Wooden furniture has a natural, rustic character and is suitable for outdoor Spaces such as gardens, terraces and courtyards.
2. Metal outdoor furniture: Metal outdoor furniture is usually made of iron, aluminum, stainless steel and other metal materials. Metal furniture has the characteristics of durability and stability, suitable for long-term use in outdoor environment.
3. Cloth outdoor furniture: Cloth outdoor furniture is usually made of waterproof, sun protection and other special treatment of fabric. Fabric furniture with soft, comfortable characteristics, suitable for use in outdoor leisure areas.
Second, Classification by function
1. Leisure Chair: Leisure chair is the most common kind of outdoor furniture, usually used for outdoor leisure, sunbathing and other activities. There are a variety of leisure chairs, folding chairs, recliners, rocking chairs and so on.
2. Dining Table And Chair: Dining table and chair are mainly used for outdoor dining, usually consisting of a table and several chairs. Dining tables and chairs of various styles, there are round tables, square tables, etc., suitable for different venues and the number of people dining needs.
3. Parasol: Parasol is used for outdoor shading, which can effectively block direct sunlight and provide a cool resting environment. There are various styles of sunshade umbrellas, including ordinary umbrellas, large umbrellas, and rotating umbrellas.
Third, Classification by shape
1. Chairs: including ordinary chairs, rocking chairs, recliners, etc., suitable for outdoor leisure and sun.
2. Table category: including dining table, coffee table, side table, etc., suitable for outdoor dining and placing items.
3. Sofa category: including single sofa, double sofa, combination sofa, etc., suitable for outdoor leisure and parties.
4. Reclining chairs: including hammocks, reclining chairs, etc., suitable for outdoor naps and rest.
5. Queue class: including benches, benches, etc., suitable for outdoor queuing and waiting.
In summary, the classification of outdoor furniture can be divided according to material, function and shape. Different outdoor furniture is suitable for different outdoor environment and activity needs, choose suitable outdoor furniture can provide comfortable and convenient outdoor life experience.
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Foshan Shengshi Zhihui Technology Co., Ltd. , https://www.szhfurniture.com