Ball lens are highly transparent spheres made of optical glasses.They are used as fiber interconnects in telecom and expanded beam connectors.Large ball lenses have been successfully used as collectors in LED lighting systems and medical devices.They have high coupling efficiency and should be much easier to align than traditional lenses due to its physical shape.Fused silica balls are ideal for the most demanding ball lens applications in the ultraviolet, visible, and near infrared spectra. Sapphire balls has superior optical transmission qualities. Ruby Balls are easier to see and therefore easier to handle for physical applications.
Half ball(hemispherical)lenses are ideal for applications such as fiber communication,endoscopy,microscopy,optical pick-up devices and laser interferometry and measurement.
Ball Lens Half-ball
Half-Ball Lens,Hemisphere Lens,Optical Hemispherical Lens,Quartz Half-Ball Lens China Star Optics Technology Co.,Ltd. , https://www.csoptlens.com
1. Vegetable pest control. The larvae are controlled at the 2-3 years of larvae. Plutella xylostella is controlled at the age of 1-2 instar larvae, using 80-120 ml of 30% emulsifiable concentrate per acre and spraying 40--50 kg of water. The aphids use 50%-70 ml of 30% emulsifiable concentrate per acre and spray evenly 50-75 kg of water.
2. Prevention and control of rice pests. Rice leaf roller is sprayed with 30% emulsifiable concentrate of 125--225 ml per acre and 60-75 kg of water. Rice planthoppers use 80-150 ml of 30% emulsifiable concentrate per acre and spray 60-75 kg of water.
3. Prevention and control of cotton pests. The cotton aphid is sprayed with 30% emulsifiable concentrate of 100--150 ml per acre and 50-75 kg of water. Helicoverpa armigera mainly controls the second and third generation larvae of cotton fields. The control period of red bollworm is the moth and the spawning period of each generation of red bollworm. The dosage is 150-200 ml per 30 mu of emulsifiable concentrate, and 75-- 100 kg constant spray.
4. Prevention and control of fruit tree pests. Peach small heartworm and P. sinensis were controlled at the peak of adult spawning, and evenly sprayed with water by 500-750 times with 30% emulsifiable concentrate. The citrus scale insects had the best control effect at the first instar nymphal stage, and evenly sprayed with 300% to 600 times of 30% emulsifiable concentrate.
5. Prevention and control of pests in dry crops. Corn and wheat armyworms can be sprayed with 30% emulsifiable concentrate of 120-240 ml per acre and 75-100 kg of water before the 3rd instar larvae.
6. Tobacco pest control Tobacco budworm, in the 3rd instar larva stage, use 30% emulsifiable concentrate 100-200 ml per acre, spray 50--100 kg of water.
Precautions:
1. The safety interval of vegetables in this product is 7 days, 9 days in autumn and winter, and 2 times in each season. The safety interval of rice, cotton, fruit trees, citrus, tobacco, corn and wheat is 14 days, quarterly. Use up to 1 time.
2. Spray the surface evenly during use to improve the efficacy.
3. Wear protective equipment when handling this product. When spraying, wear the mask, wear a mask, and do not inhale the droplets. Rinse with soap and water after medication.
4. This product should not be used on mulberry or tea trees.
5. This product can not be mixed with alkaline agents to avoid decomposition failure.
6. This product is flammable and fire is strictly prohibited. Pay attention to fire prevention during transportation and storage, and keep away from fire. 
*Material:BK7 or other optical glasses,optical crystal materials
*Diameter:1mm - 40mm
*Dimension Tolerance:+/-0.005mm
*Surface Quality:40-20
*Sphericity:0.005mm
*Coating:optional
With the increase of temperature, the control of crop pests has also been officially put on the agenda by farmers. Acephate is a highly effective insecticide with stomach poisoning, contact and fumigation effects, which can be applied to a variety of field crops. Let's follow the Xiaobian to understand it.
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】