Processing of semi-finished optical lens
The processing of semi-finished optical lenses involved a variety of processes and equipment. For example, an automatic forming device for semi-finished products of a camera lens, including a concave mold, a heating furnace, a molding device, a frame, a feeding device, and a reversing device. The heating furnace, the molding device, the feeding device, and the reversing device are all arranged on the machine frame, and a number of concave dies are arranged at the output end of the reversing device, and are driven by the reversing device to circulate and pass through the feeding station, the heating station, and the molding station in sequence. The feeding device is arranged at the feeding station and is used for feeding glass raw materials to the concave mold. The heating furnace is at the heating station, and the molding device is at the molding station. The glass raw material blocks in the concave mold are pressed and formed by the molding device after being heated by the heating furnace. The feeding and unloading processes do not require manual participation, and the production efficiency is high. This process was the automatic molding process of the glass lens from raw materials to semi-finished products. The subsequent process of polishing, polishing, and coating the semi-finished product of the camera lens needed to be done to form the finished product of the camera lens. Read more exciting novels for free
Processing and distribution of semi-finished vegetables
The processing and distribution of semi-finished vegetables was the process of processing and distributing fresh vegetables. The emergence of this business model was to solve the loss of vegetables and make profits. At the same time, it also catered to the needs of the lazy economy and young people in modern society. The semi-finished vegetable processing and distribution project had a profit margin. There were two main ways to make a profit: one was to realize profits through price difference, that is, to buy vegetables at a low price and sell them at a high price; the other was to process vegetables into semi-finished products and sell them at a high price. This business model was highly competitive in the market. It required close tracking of market trends, grasping consumers 'tastes and preferences, and timely development and launch of products that met the needs of young people. In the future, the semi-finished vegetable distribution market still had market prospects, especially for those food and beverage companies that did not have the full line of cold chain logistics. The semi-finished vegetables produced by local food and beverage companies had a competitive advantage. In addition, the integration of semi-finished vegetables and online economy also added potential to its market prospects.
Semi-finished vegetable processing project
The semi-finished vegetable processing project was a business that processed vegetables into semi-finished products for subsequent food processing. These semi-finished products were usually obtained after peeling, cutting, steaming, etc. They could be directly used to make various dishes, hot pot base, frozen products, etc. The prospect of the semi-finished vegetable processing project was currently receiving much attention because vegetables were the second largest category of crops grown in China. Moreover, vegetables were easy to consume. If they were not effectively preserved and utilized, they would easily cause decay and could not be sold. By processing the vegetables into semi-finished products, not only could the vegetable resources be rationally utilized and distributed, but the loss rate of vegetables could also be reduced. In addition, the profit of the semi-finished vegetable processing project was mainly realized through the price difference. That was to buy vegetables from the vegetable base at a low price and then sell them at a high price after simple packaging. Therefore, the semi-finished vegetable processing project had a certain development potential in the market.
Small project of processing semi-finished products at home
There were many small semi-finished products processing projects that could be done at home, such as: 1. ** Beaded Handcraft **: Many door curtains and curtains need to be made into beaded curtains. This project does not require any skills and is easy to learn. It is suitable for both young and old. You can make use of your child's free time after school, washing clothes and cooking to make beaded curtains at home. 2. ** Crafts production **: processing and making flower baskets, cornhusk cushions, straw hats, paper-cutting, insoles, sewing tigers, cloth shoes and other crafts. 3. ** Handmade jewelry assembly **: Handmade jewelry made of pearl materials. The style is natural and can be customized. It is purely handmade and can be sold through TikTok and other platforms after processing. 4. ** Food processing category **: Buy semi-finished French fries and crispy meat, and use the air fryer to process them into snacks. You can also use the finished dish package, such as braised pork, tomato eggs, stir-fried beef, etc., which can be packed in two catties. After heating, they can be used in the fast-food canteen to serve meals. One big package can serve 7 - 8 meals. 5. ** Traditional sewing **: If you have basic sewing skills and experience, you can make some simple household items, clothing, bedding, and other textile products for sale. In the 1970s and 1980s, there was still the family manual work of sewing labor protection white thread gloves. You can get semi-finished gloves with the upper and lower parts of the wrist separated and the fingers not completely sewn from the Street Committee. After processing, you can earn money. The novel " Small Business " is equally exciting. Everyone is welcome to click and read it!
The hood of an optical lens
The hood was a device installed at the front of the camera lens, digital camera, and video camera. It was an important part of the lens optical system. Its main uses included: 1. ** Suppression of stray light **: avoid glare and improve image clarity and color reproduction. In different light positions such as backlighting, side backlighting, forward lighting, side lighting, lighting photography or night photography, it can prevent non-imaging light, surrounding scattered light or interference light from entering the lens, avoid fog and halo phenomena, and improve the color saturation and clarity of the picture. 2. ** Protect the lens **: When the lens is accidentally dropped, it can help reduce the damage caused by the fall; it can prevent fingers from accidentally touching the surface of the lens; it can also block the sand, rain, snow, etc. to a certain extent to prevent other things from directly touching the surface of the lens. In terms of usage, the hood in front of all the lenses had been carefully calculated by the manufacturer to help improve the quality of the shot. If the lens was equipped with a crystallizer, although the crystallizer and the hood had no similarities, the hood still needed to be installed. When rotating the crystallizer, the hood could be turned upside down and buckled on the lens, or temporarily removed and placed in the camera bag. It was not necessary to buy the original hood. Buying a hood that matched the lens 'caliber and angle of view could play its role. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The optical parameters on the lens
The following is some common optical parameters on the lens: 1. ** effective focal length (EFL)**: The distance from the center of the lens to the focal point. It could be divided into image focal length (the distance between the main surface of the image and the focal point of the image) and object focal length (the distance between the main surface of the object and the focal point of the object). If the focal length is too short, it will cause the field of view to be too large, causing distortion, difficulty in controlling the angle of the chief ray, low contrast, serious lens bending, difficulty in correcting the phase difference, and other problems. If the focal length is too long, the lens will be too long, which is not conducive to the miniaturized system. Moreover, the field of view is too small to meet the user's needs (FoV>60°). 2. ** Total length of lens (TL)**: It is divided into optical length (the distance between the first surface of the lens and the image surface) and mechanism length (the distance between the end of the lens barrel and the image surface). 3. ** Back focal length (BTL)**: The distance from the last side of the lens in the optical system to the image plane. 4. ** Front focal length (FFL)**: The distance from the first surface of the lens to the object surface in the optical system must be distinguished from the back focal length of the mechanism. 5. ** Mechanical back focal length (FTL/FFL)**: The distance from the last mechanical surface of the lens group to the image surface. 6. ** Field of View (FoV)**: The largest field of view that the camera can capture. It can be divided into diagonal field of view (FoV-D), horizontal field of view (FoV-H), and vertical field of view (FoV-V). The diagonal field of view is the largest, followed by the horizontal field of view, and the vertical field of view is the smallest. The so-called field of view refers to the diagonal field of view of the digital camera module. The size of the field of view was related to the focal length. Generally, the larger the field of view, the shorter the focal length. 7. ** Joules (F/NO.)**: It was the ratio of the effective focal length to the diameter of the pupil, which was used to determine the brightness of the lens. Under the premise of ensuring the same aperture, the shorter the focal length, the smaller the relative aperture should be. In general, the smaller the F/#, the larger the aperture. 8. Distortion: It is the off-axis phase difference. It is the height difference between the intersection point of the off-axis point and the main ray on the image plane and the ideal (paraxial-like) image plane. It is a function of the field of view and has nothing to do with the aperture. Distortion was divided into TV distortion and optical distortion. TV distortion was further divided into pillow type and cylinder type. Distortion is the image quality that users can easily feel. Different application scenarios have different requirements for distortion. For example, Optical-Distortion <3% is not easy to detect by the human eye, and the objective lens generally requires Optical-Distortion <2%. 9. ** relative illumination (Ri)**: The ratio of the central illumination to the peripheral illumination. If the contrast was too low, the center of the image would be bright and the surroundings would be dark (vignette phenomenon, commonly known as dark corners), which would also cause color distortion. The Ri is directly proportional to COS4 (semi-fov). Different semi-fov correspond to different theoretical values of the Ri. When the Ri<50%, the human eye can distinguish it. In serious cases, the four corners of the picture will be completely black. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Family factory semi-finished product project processing category
The following are some semi-finished products processing projects that are suitable for family factories: - ** Arts and Crafts **: - ** Hand-woven rattan semi-finished products processing **: It is suitable for people with certain manual skills, such as disabled friends, to carry out this kind of processing work in the sheltered workshop. It does not require large equipment and mainly relies on manual operation. It can be carried out on the workbench at home. - ** Half-finished headdress processing **: This is also a project that requires a lot of manual work. It doesn't have high requirements for the site and can be completed at home. - The processing of semi-finished products such as flower baskets, cornskin cushions, wheat straw hats, paper-cutting, insoles, sewing tigers, cloth shoes, etc. These products did not require much space and equipment investment. They were mainly manual operations and could be produced at home. - ** Ornaments **: The processing of some small accessories such as spectacle chains and mask chains. The assembly of accessories for such products can be carried out at home. The price can be adjusted according to the style, accessories, and difficulty. The production scale can be flexibly adjusted. For example, a small amount can be distributed to Bao Ma for processing at home. - ** Bean products **: Using soybeans as raw materials to process into semi-finished products such as tofu, shredded tofu, tofu skin, dried tofu, etc., and green beans can also be processed into semi-finished products such as vermicelli, and green bean cake. The equipment requirements were relatively simple, such as small equipment such as a refiner, which could be operated by a family workshop. The bean dregs could also be used to feed livestock. - ** Peanut **: Peanut processing workshops can process peanuts into various semi-finished products. There are many products that can be processed from peanuts. Moreover, peanut processing workshops have low investment and relatively simple technology. The novel " Small Business " is equally exciting. Everyone is welcome to click and read it!
The technical parameters of the optical lens
The main technical parameters of the optical lens were as follows: 1. ** effective focal length (EFL)**: The distance from the center of the lens to the focal point. It was further divided into image focal length (the distance between the main surface of the image and the focal point of the image) and object focal length (the distance between the main surface of the object and the focal point of the object). If the focal length is too short, the field of view will be too large, resulting in distortion, difficulty in controlling the main ray angle, low contrast, serious lens bending, difficulty in correcting the phase difference, and other problems, which is not conducive to the design; if the focal length is too long, the lens will be too long, which is not conducive to the miniaturized system. If the field of view is too small, it is difficult to meet the user's needs (FoV>60°). 2. ** Total length of lens (TL)**: It is divided into optical length (the distance between the first surface of the lens and the image surface) and mechanism length (the distance between the end of the lens barrel and the image surface). 3. ** Back focal length (BTL)**: The distance from the last side of the lens in the optical system to the image plane. 4. ** Front focal length (FFL)**: The distance from the first surface of the lens to the object surface in the optical system must be distinguished from the back focal length of the mechanism. 5. ** Mechanical back focal length (FTL/FFL)**: The distance from the last mechanical surface of the lens group to the image surface. 6. ** Field of view (FoV)**: refers to the largest field of view that the lens can capture. It can be divided into diagonal field of view (FoV-D), horizontal field of view (FoV-H), and vertical field of view (FoV-V). The diagonal field of view is the largest, followed by the horizontal field of view, and the vertical field of view is the smallest. The so-called field of view usually refers to the diagonal field of view of the digital camera module. 7. ** Joules (F/NO.)**: It is the ratio of the effective focal length to the diameter of the entrance pupil, which is used to determine the brightness of the lens. Under the premise of ensuring the same aperture, the shorter the focal length, the smaller the relative aperture should be. In general, the smaller the F/#, the larger the aperture. 8. ** Distortion **: It is the off-axis phase difference. It is the aberrations of the off-axis thin beam. It is the height difference between the intersection point of the off-axis point and the main ray on the image plane and the ideal (near axis) image plane. It is a function of the field of view and has nothing to do with the aperture. The primary distortion changes with the cubic power of the field of view (image height), and the percentage distortion increases with the square of the image height. The distortion varies with different fields of view, and the distortion changes are non-linear. It is only the distortion of the image and does not affect the clarity of the image. Distortion is divided into TV distortion and optical distortion. TV distortion is further divided into pillow type and cylinder type. Different application scenarios have different requirements for distortion. For example, Optical-Distortion <3% is not easy to detect by the human eye, and Optical-Distortion <2% is the distortion requirement of the photographic objective lens. 9. ** relative illumination (Ri)**: The ratio of the central illumination to the peripheral illumination. If the contrast was too low, the center of the image would be bright and the surroundings would be dark (vignette phenomenon, commonly known as dark corners), which would also cause color distortion. The Ri is directly proportional to COS4 (semi-fov). Different semi-fov values correspond to different theoretical values of the Ri. When the Ri<50%, the human eye can distinguish it. In serious cases, the four corners of the picture will be completely black. 10. ** resolution **: It can be defined as the number of pairs of black and white stripes that can be distinguished in millimeters when the lens is used to observe the black-and-white grid pattern. When selecting a lens, the lens resolution is usually required to be slightly higher than the resolution of the picture element. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Classic lens optical structure
The following are the optical structures of some classic lenses: 1. Single-piece lens (one set, one piece): It was first invented by the Englishman Wollaston in 1812. It had a maximum aperture of F16 and was called a crescent-shaped landscape lens. Its structure could not change the aperture. It was mostly used in early simple box-type cameras (mainly for artists to draw pictures). This structure was similar to the structure of the human eye, but because the camera lens only had one lens, the image would have problems such as spherical aberrations, color aberrations, and coma. Lenses with this structure were commonly seen in presbyopic glasses, but strictly speaking, presbyopic glasses could not be called lenses. 2. **1 set of 2 lens structure **: invented by the Frenchman Chevalier in 1821. It was an achromatic lens with a maximum aperture of F14. It was also a lens with a non-changeable aperture. It glued the concave lens and the concave lens together to eliminate some of the color aberrations. In 1839, the Kilux camera invented by Daguerre used this kind of lens. 3. ** Petzval structure (3 sets of 4 pieces)**: In 1840, the Austrian mathematician Professor Petzval used mathematical methods to design a portrait lens with a maximum aperture of F3.7. This structure of the lens is still popular today. 4. ** Double Gauss structure **: It appeared during World War II. 5. [Heavenly Sai structure: 100 years of history.] <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
lens switching device of dual-lens optical scanner
The lens switching device of the dual-lens optical scanner includes a base, a number of magnetic elements, a number of electromagnetic elements, a guide component, and a sliding block. Two optical lenses with different magnifying powers were mounted on the slide. When one of the electromagnetic elements attracts an adjacent magnetic element, and the other electromagnetic element repels the other adjacent magnetic element, the sliding block can move and be positioned in one direction, so that the dual lenses installed on the sliding block can be switched according to the scanning requirements. This device had the advantages of reliable positioning, simple structure, few parts, and fast assembly. Moreover, it did not need to be equipped with a positioning sensing component, so the cost was relatively low. it control that magnetic field direction of the electromagnets to generate attraction or repulsion force to drive the len frame to slide left and right on the sliding shaft to switch the lens. the magnets are arrange on both sides of the lens frame, the electromagnets are arranged at the corresponding positions on both sides of the base, and the lens frame is erected on the sliding shaft of the base. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Sunny optical phone lens design
Sunny Optics 'phone lens design had many features. The lens was known for its high definition and optimized optical design. For example, the slanted lens design improved the shooting performance in low-light environments. At the same time, Shunyu introduced advanced coating technology in its latest lens, which reduced reflection and significantly improved color reproduction, allowing users to feel more realistic colors and higher contrast. In addition, the lens also adopted a lightweight design, allowing smartphone manufacturers to retain a smaller body while providing more powerful shooting capabilities. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>