A green laser diode is installed on the right front end of the suction head cover of the vacuum cleaner, and the light height is adjusted to form a distance from the ground to form a 1.5-degree angle. After being refracted by the lens, it diffuses outward, and evenly illuminates the area in front of the suction head, making the shadow of dust In stark contrast to the ground, the light "focuses" on the fine dust that is difficult to see with the naked eye. Compared with ordinary LED lights, LD lasers are easier to clearly identify dirty areas.
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