As the saying goes, "buy is not sold fine", so many friends often shop around when shopping, carefully selected shopping guidelines. Home appliances are essential life essentials in our daily lives, so we need to do our homework and buy them correctly when purchasing.
First, look at the brand
Nowadays, there are many air-conditioners on the market, and many products such as Gome and foreign countries are purchased. However, in this case, users are reminded of the need to purchase brand-trusted products with guaranteed products, so that there will be after-sales problems in air conditioners. If you have a small brand or a local one, you may not be able to keep up with after-sales or other services.
Second, pick a good business
After consumers choose the air-conditioning brand, they have to decide where to buy. When buying air conditioners, it is especially important to choose a business. Because strict air conditioning is a semi-finished product, it can be used without being bought from the store, but it must be installed and debugged by a professional team before it can be used. If the installation and debugging are not good, it will bring a series of problems, such as the air is not clean, the pipe joint leaks, and the human error caused by the debugging. These will not only affect the use of the effect, but also add a lot of troubles.
Third, the volume of housing purchase
Strictly speaking, the purchase of air conditioners is limited by the area of ​​use. The air conditioners that are used according to the area of ​​use are also different, so there is a “number of horses†to measure the size of air conditioners.
Fourth, the timing of the selection
The purchase of home appliances also has a price fluctuation due to the off-season and peak season. It is understood that from the last year of October to the end of March of the following year, it is off-season, and from 4 to 9 is the peak season, the spread between the peak season and the off-season is about 7%-10%, so look at the purchase. Punctuality, especially a hypermarket promotion is also a rare opportunity to buy.
Our Dome Lens is an optical window composed of two parallel curved surfaces. Dome lenses are commonly used in meteorology applications, pyranometers, defence applications and often used in high pressure viewports in underwater cameras and submersibles.For this reason our dome offer both high transmission as well as durability. Other application for our dome include visible-range domes for pyranometers and infrared-range domes for pyrgeometers, and as high pressure viewports in underwater cameras and submersibles.
BK7 or K9L domes are used primarily in meteorology applications. BK7 offers excellent transmission from 300nm up to 2µm. BK7 is a relatively hard material, with excellent chemical durability.
UV fused silica domes ( JGS1 ): For applications operating in the deeper UV range, we offers a range of UV fused silica domes. Fused silica domes are commonly used in underwater applications at extremely high pressures.
Sapphire domes: For infrared applications we can provide sapphire domes. Sapphire is an extremely hard material with transmission of over 80% in the 2-5µm wavelength range. As with fused silica, sapphire is able to withstand extreme pressures, making it the perfect material for underwater camera and missile fairing applications.
Specifiation of our dome lens as follow:
Material:Optical glass N-BK7 , H-K9L, UV Fused Silica, Sapphire, and infrared crystal materials.
Diameter:20-350mm
Diameter Tolerance:+/-0.1mm
Thickness:>2mm
Thickness Tolerance±0.2~0.1mm
Center Deviation:3-5'
Surface quality:80/50 60/40
Coating: Antireflection Coating inside
Chamfers:0.2 x 45° typical
300Mm Diameter Dome Lens,300 Mm Diameter Hemisphere Dome Lens,Glass Dome Lens For Camera,Dome Lens For Subsea Shooting
China Star Optics Technology Co.,Ltd. , https://www.realpoooptics.com