Cylinder Lenses are offered in both plano-concave and plano-convex configurations, they are typically used to focus incoming light to a line, or to change the aspect ratio of an image. Cylinder Lenses are available with positive or negative focal lengths, they are used for the optics, lasers, medical science, electronics, tele-communication and others.
Worldhawk can provide various kinds of Cylindrical Lens with high precision, We are proud to be one of the few suppliers can detection the radius and flatness about the cylindrical lens in China. Absolutly can ensure all the products are qualified.
Meniscus Cylindrical Lens Meniscus Cylindrical Lens,Meniscus Cylinder Lens,Glass Meniscus Cylindrical Lens,Optical Meniscus Cylindrical Lens ChangChun Worldhawk Optics Co.,Ltd , https://www.worldhawk-optics.com
Worldhawk can offer cylinder Lenses include Convex Cylindrical Lens, Concave Cylindrical Lens, Meniscus Cylindrical Lens, and Doublet Achromatic Cylindrical Lens ect. Choose from N-BK7 glass, UV fused silica, or CaF2, all of which are available uncoated or with an antireflection coating.
Kidney bean can not make the root fertilizer "home"
Recently, he received a phone call from the master of Jiang Guizhi, Yangzhuang Village, Gucheng Street, Shouguang City. He said that his family's cowpeas had bad scabs and the output was seriously reduced. When the reporter came to the shed of the Jiang’s master’s house, he saw that cowpea plants grew better in the shed, but there was less flowering, and the kidney beans were short and curved. This situation has only recently happened. What is the reason? The reporter carefully inquired about the recent changes in management and noted one of the issues. Master Jiang said that he recently heard that agricultural experts said that he had just entered a fertilizer that contained not only nutrient content, but also fulvic acid, etc. to promote root growth. The effect was very good. Master Jiang used this fertilizer when applying fertilizer. The reporter saw the fertilizer said by Master Jiang at the entrance to the greenhouse. The main ingredient on the package was fulvic acid. Kidney beans need to absorb a large number of nutrients during the fruitful period. When topdressing, only applying this fertilizer can not meet the fruit growth and development needs. Studies have shown that for every 1,000 kilograms of cowpeas produced, 3 kg of nitrogen, 2.3 kg of phosphorus, and 6 kg of potassium are needed. The result is a period of maximum nutrient demand. At this time, full use of water-soluble fertilizers, such as lighthouses and good-lips, should be used. , Fang Run, etc., together with a small amount of rooting fertilizer. If long-term application of this kind of root-fertilizing fertilizer, its nutrient content is low, it is difficult to meet the nutritional needs of cowpea flowering and sitting, especially in the absence of boron and other trace elements, there will be poor situation of flowering. Therefore, when the vegetables are in the fruitful period, if the roots, stems and leaves are well developed, the main task of the vegetable farmers is to ensure that the nutrient supply is sufficient to meet the fruit growth and development needs. First of all, fertilization should include N, P, K and other nutrients with high levels of nutrients, and timely addition of trace elements. During the fruit period of cowpea, the amount of fertilizer needed is high. It is recommended that the vegetable farmer use balanced total water-soluble fertilizers, such as lighthouses, aromatics, etc., and apply 8-10 kg per mu. In addition, it is necessary to add trace elements such as molybdenum, boron, zinc, and copper. Second, ensure a reasonable temperature. The suitable temperature for flowering and podging of cowpea is 18°C-25°C. When the temperature is higher than 27°C, it should be ventilated and cooled. Ventilation can also ensure adequate supply of carbon dioxide and improve photosynthesis. At the same time, it is necessary to promptly pick up the tip and prune the ineffective shoots so that the nutrients can be supplied to the fruit. In short, vegetable farmers should select suitable types and doses of fertilizers for flushing, and manage the greenhouses according to the different stages of plant development, so as to obtain high yields.