Optical Windows are flat, plane-parallel plates that are often used as protective barriers for electronic sensors or detectors from outside environments. Optical Windows should be selected based on the material transmission or mechanical properties of the substrate. Optical Windows do not cause change in the magnification of a system. Worldhawks` Optical Windows are offered in a variety of substrates, such as Germanium (Ge), Silicon (Si), N-BK7(H-K9L), UV Fused Silica, Zinc Selenide (ZnSe). Multiple anti-reflection coating options are available for the Ultraviolet (UV), visible, or Infrared (IR).
Worldhawk offers standard and high precision optical glass windows in round ,rectangular, wedge windows and custom shape and size with different optical glasses,Fused Silica, Sapphire, ZnSe, Zns and IR crystal. The high precision parallelism of 10 arc seconds, surface quality of 40/20 and flatness of λ/10. Single layer or multi-layer anti-reflection coatings are available.
Sapphire Step Windows,Sapphire Glass Windows,Sapphire Special Windows,Polished Sapphire Glasses ChangChun Worldhawk Optics Co.,Ltd , https://www.worldhawk-optics.com
Summer corn fertilization techniques
Maize is a high-yield crop and requires a large amount of fertilizer. When fertilizing it, it must be based on the law of demand of maize and scientific fertilization in order to obtain high-quality and high-yield corn and achieve maximum economic benefits. Based on my years of experience in agrochemical service work, the author summarizes some tips for summer corn fertilization and hopes to help the majority of farmers. Pay attention to return straw. Straw returning can effectively increase organic matter content and improve soil fertility. Through surveys, the emphasis on the return of straw to the fields can significantly increase corn production. However, after the straw is returned to the field, suitable nitrogen fertilizers should be used to adjust the carbon-nitrogen ratio so as to accelerate the maturity of the straw. Skillfully applying base fertilizer. Summer corn base fertilizer can be controlled by high-nitrogen controlled-release fertilizer, and can also be applied when 4-5 leaves of corn are used to release nutrients slowly, which can meet the nutrient requirements of corn in various periods, comprehensively improve the utilization rate of fertilizer, and can be applied once. Do not have to top-dressing later, save time and money. High-nitrogen type compound fertilizers can also be used, and timely fertilizers can be applied later. Grab dressing tips. The frequency of topdressing depends on the soil fertility, the amount of fertilizer applied, and the amount of base fertilizer. The big bellmouth period is the period when the corn needs the largest amount of fertilizer, and it is the key period for determining the size of the ear and the number of ears. The topdressing can be applied once in the big bell mouth period, but it can also be applied twice in the jointing period and the big bellmouth period, but During the jointing season, it is necessary to apply less fertilizer, and it is necessary to catch more after one time. Pay attention to topdressing in the shade of corn. There are two benefits to the top dressing: First, the shade surface has more moisture than the positive surface, which is favorable for the release of fertilizer nutrients and the absorption of nutrients by maize, which can increase the utilization rate of fertilizers; second, the root system of the yin-mian is weaker than the root system of the yang, which can be applied Enhance the shade root system to prevent corn lodging.