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Ball lenses are a completely spherical lenses most commonly used for improving signal coupling between fibers, emitters and detectors. Aside from fibre coupling applications, ball lenses are also used as objective lenses in endoscopy, laser measurement systems and bar-code scanning. Ball lenses are manufactured from a single substrate of glass and can focus or collimate light, depending upon the geometry of the input source.
Ball lenses are great optical components for improving signal coupling between
fibers, emitters, and detectors. They are also used in endoscopy, bar
code scanning, ball pre-forms for aspheric lenses, and sensor
applications. Ball lensesare
manufactured from a single substrate of glass and can focus or
collimate light, depending upon the geometry of the input source.
Half-ball lenses are also common and can be interchanged with full ball
lenses if the physical constraints of an application require a more
compact design.
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[wall bump repair method]
1. Some reasons for repairing the wall surface of the wall: a. Wall peeling, moldy, and damage caused by water seepage; b. Man-made nail damage and door collision. c. Decoration has quality problems. Falling and so on. Water seepage must start from the source. In general seepage, there are roofs, external walls, kitchens and kitchens, balconies, and seepage between the window frame and the outer wall joints. Then repair the wall.
A. Solve the water seepage first, then (remove the wall from the skin, breakage) to the cement layer, after drying, you can first brush a strong insulation sealer to separate water vapor, and dry it according to B after the next day.
B. Bump the small hole in the wall (first use a shovel to remove the damaged wall surface from the skin, empty drum, gray block, and wipe clean dust; dig an appropriate amount of wall repair cream; directly apply the repair cream Treat the damaged wall surface; grind the dried repair paste; wipe the dust after the repair paste is polished; use the wall repair paint to make the final modification)
2. Anti-alkali on the wall Firstly use an oxalic acid brush to synthesize on the wall, then clean it up, then brush a layer of insulating sealant to resist alkali and build it according to (B). 3. Use mildew on the surface of the mold to remove surface mold. After drying, use make-up paint (add 20% water) to mix and brush again: whitening, beautiful wall surface.
4. Moisture on the surface of the damp wall can be coated with anti-mould agent, or the isolation sealant can be used to separate water vapor. If the putty layer can absorb water, it can be sprayed and sprayed with waterproof spray to achieve waterproof. 
[How to maintain the daily routine of the wall]
1. The principle of wall cleaning When vacuum cleaning the wall wallpaper, pay attention to vacuum cleaner for suction head, usually if you find that the wall surface has to be erased in a timely manner. In addition, when we clean the walls, we must pay attention to the different cleaning methods for the water-resistant and non-water-resistant walls. For water resistant walls, we can use water for scrubbing, wipe clean and dry with a dry towel; for water-resistant walls, we can use a rubber wipe or wipe with a towel and wipe with a few clean liquids. In short, the dirt on the wall should be cleared in time, otherwise it will leave permanent marks for a long time.
2. The principle of wall maintenance Because the surface of the wall is less frictional, it is mainly dirt, water droplets, etc., so the maintenance of the wall is different from the maintenance of the ground and cannot be treated in the same way. In general, the maintenance of the wall surface is to wipe off the surface floating dust every day, and regularly use wax water for maintenance. Spray wax water has both cleaning effect and transparent protective film on the surface, which is more convenient and regular cleaning. As for the wall of the bathroom, it should be cleaned regularly with alkaline cleaners. After washing, it must be washed with water, otherwise it will make the surface dull.
3. Expert Tips There are many types of wall decoration materials, including wallpaper, wall covering, plastic, wood, and paint. Therefore, when we decorate the wall, we must fully consider the living environment and other factors, use the most appropriate materials to beautify the wall surface. In addition, in the cleaning and maintenance of the wall, we must first understand the characteristics of various materials, and targeted use of reasonable cleaning and maintenance methods, so as to ensure the gloss of the wall as new, extending its service life, Really save money for yourself. 
Xiao Bian concludes: The above introduced the wall bump repair skills and how to maintain them. I hope to be helpful to everyone. For more relevant knowledge, please continue to pay attention to this website information platform. Follow-up will present more exciting content for everyone.
Wall bump repair tips also give you a fresh new home
The appearance of the family wall is very important, and the well-built three-dimensional wall makes people comfortable and comfortable. However, the wall will inevitably bump, water seepage from the skin, damage, anti-alkali, moldy, damp, dampness and other blocked will cause the wall to be unsightly. So what problems should you pay attention to when repairing a wall bump ? Let's take a look at it right away.