Reasons for tomato drop

There are two reasons for tomato fruit drop: First, physiological fruit drop. Mostly after falling to the middle of July. Second, due to pests and diseases caused by falling fruit. Prevention measures: prevent tomato fruit drop, one configuration pollination tree; Second, the flowering period of the main trunk or main branch of the strong tree circumcision, the width should not exceed 0.5 cm, after the ring cut to strengthen the fertilizer and water supply; third is appropriate trim, especially to strengthen Summer pruning promotes ventilation and light transmission; Fourth, prevention and treatment of diseases and insect pests, strengthening of fertilizer and water management, and strengthening of tree vigor; Fifth, spraying 600 mg of alginic acid lactone during flowering or young fruit period; Sixthly, topdressing once in autumn and spring.

Double Convex Cylindrical Lens

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 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.

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.

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ChangChun Worldhawk Optics Co.,Ltd , https://www.worldhawk-optics.com