According to the Heilongjiang Provincial Meteorological Observatory, the average temperature in Heilongjiang Province in mid-November was 10.2 °C higher than that of Daxinganling, Yichun and Qiqihar in the same period of the previous year. Other cities were close to normal. The northern part of the Greater Xing'an Mountains is at -16 to -14 °C, the southern part of the Daxinganling area, Heihe City at -13 to -11 °C, Yichun, Qiqihar, Suihua, Harbin at -10 to -8 °C, and other cities at -7~. -5 ° C. Linyi Fertilizer Network Copyright
The precipitation is close to the same period of the previous year, with Daxinganling, Heihe and Qiqihar being 2~4mm, and other cities being 6~10mm. Among them, from 11 to 12, Daqing, Suihua, Harbin, Mudanjiang and Jixi had medium to heavy snow, and some had large blizzards, Daxinganling was cloudy, and other areas were small to medium snow. From 13 to 14 days, there were medium to heavy snow in the central and eastern regions. Partially large to blizzard, the northwest is sunny, and other areas have snow; at the end of the year, there are snow in the province. Linyi Fertilizer Network Copyright
The snowfall weather that will be ushered in in the middle of Heilongjiang Province will have a certain impact on the production and life of the agricultural area. After the snowfall, the temperature will drop. Therefore, it is recommended to do the cold and warm work everywhere, especially in the vegetable greenhouses and pastoral areas. Strengthen management to prevent the harm caused by freezing damage. At the same time, we must pay close attention to the weather changes. After the snow, we should ventilate and dry the food in time to avoid mold. Linyi Fertilizer Network Copyright
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Concave Grating
Reflective Concave Blazed Holographic Gratings
Concave Gratings are critical components in a variety of spectroscopic instrumentation.They are quite useful in analytical instruments,ranging from food analysis to plastics manufacturing and process quality assurance.They are also ideal for applications in optical communications,biotechnology, colorimetry,chromatography,and medical instrumentation.
China star optics can provide customers with a variety of replicated grating products such as diffraction gratings, reflective gratings,holographic gratings,concave gratings etc. to meet different needs. Maximum ruled area is up to 300x300mm2 for plane ruled diffraction gratings. For replicated diffraction and transmission gratings the ruling density can be from 20 grooves per millimeter to 2400 grooves per millimeter, wavelength from 0.2 micron to 25 microns.
Holographic gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 0.2-0.8um
Grooves per mm: 1,200 to 3,600L/mm
Diffraction: >70%
Ruled gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 0.2-15um
Grooves per mm: 50 to 2,400L/mm
Diffraction: >70%
Concave gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 200 to 900um
Grooves per mm: 490 to 1,200L/mm
Diffraction: >70%
Concave Grating,1200 Lines/Mm Holographic Grating,Concave Fiberglass Grating,Platform Fiberglass Grating
China Star Optics Technology Co.,Ltd. , https://www.realpoooptics.com