According to the physical condition of different users, ancient doctors filled the corresponding Chinese herbal medicines into pillows and made them into medicine pillows. After years of use, users can not only make the house full of fragrance, but also prevent and treat various diseases and achieve longevity. purpose.
The tea pillow has to be said from the structure of the pillow. The pillow is generally composed of a pillow core and a pillowcase. The pillow needs a filling material to keep the pillow at a certain height during use, and the tea pillow is used as a filling.
Regular tea pillows are often selected from the newly harvested tea leaves as special fillers. Such a tea pillow, the tea is not easy to be broken, the tea is less, and the pillow is not exposed, and the upper and lower sides are also added with a certain thickness of high-quality resin cotton, so it will not be scratched. Tea contains a variety of ingredients that are beneficial to the human body, and it emits aromas that can improve the indoor air and make people feel fresh, such as Mu Tea Garden, which can improve sleep and health.
The good tea pillow fabric is made of high-density cotton, and the interlayer is filled with resin cotton, which is more comfortable to use. Under the protection of such pillowcase, the quality of the pillow is still guaranteed within 3 years. Not only is the service life higher than that of ordinary tea pillows, but it also has advantages over other ordinary tea pillows in terms of other indicators of ensuring sleep quality.
Pillows with poor air permeability can make people in sleep poorly breathable, and tea can ensure the breathability of the pillow. Sleeping on such a pillow can smell the tea and not worry about breathing problems during sleep.
Generally speaking, a harder pillow is good for human health, but a hard pillow makes the head and the pillow have too little contact area, and the partial pressure is too large, which makes people feel uncomfortable. The head, neck and back arm are produced the next morning. Symptoms such as numbness or pain in hands, etc.; too soft pillows are difficult to maintain the height of the pillow, and because the area is too soft, the scalp compression area is large, which is not conducive to blood circulation, and there is also a problem of ventilation performance, which cannot guarantee the head during sleep. The skin is fully breathed and may pose a safety hazard when breathing on the back. Tea pillows happen to strike a balance between soft and hard.
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.opticsrealpoo.com