The frost is the eighteenth solar terms in the twenty-four solar terms, the last solar term in the fall, and the transitional holiday from autumn to winter. Therefore, the management of citrus is focused on preventing cold, and the following measures must be taken: Cut off the autumn shoots after the fall of the autumn shoots, and smear the buds in 5~7 days. If the late autumn shoots that have not been erased and have not yet reached the lignification, they must be cut off with a branch. After pruning, spray the tree guards to disinfect the anti-pathogenic bacteria from the wound. The backbone is white-wrapped and the main branch is whitewashed on the trunk of the citrus tree in November. Apply white paint to reduce the temperature difference between day and night with white reflection. The tree tray is cultivated and covered from the end of November to the beginning of December. After the tree has been subjected to cold-resistant exercise for a period of time, immediately cultivate the soil and pour it into the first branch of the main branch. Pay attention to the soil, or take the soil from the line, do not hurt the citrus root. then Cover the tree tray or strip tree with straw or film. The citrus and citrus tree canopies are covered with straw before freezing. Spraying the medicine to keep the heat-insulating agent in time, you can spray the orange tree with a new high-fat film, spray it once every 7~10 days, form a physical polymer film on the citrus branches and leaves, keep warm to reduce water evaporation and prevent bacterial invasion. dye.
Sensor structure:
A lens collects light of a particular color, and a color filter filters light of other colors, projecting one color onto the area
Connection mode of Sensor and substrate:
COB: Module takes the sensor die and connects the sensor to the substrate through the gold wire.
CSP/TSF: Sensor is connected to the substrate and packaged when shipped.
IR Cut and Blue Galss:
The function of IR Cut is to filter out the light frequency invisible to human eyes (reflected back). What human eyes can see is 400~700nm.
Blue Glass absorbs infrared rays, which are not easy to be reflected internally
The Image circle of the Lens needs to cover the sensor's sensitive area
Lens shading:
A condition in which light is unevenly distributed, such as when the center is lit and the outside is dimmed. This is mainly because most of the light is concentrated in the middle, and because different wavelengths of light are imprinted in different places
FOV:
The lens Angle of the module must be the same as that of the lens; otherwise, when the lens Angle is too large, dark Angle may appear.
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