2. In the printing industry, it can be used for fine correction, color correction, dot and edge extension observation, and can accurately measure screen mesh, dot size, overprint error and so on.
3. In the textile industry, we can observe and analyze the fiber and warp and weft density of fabrics.
4. In the electronic industry, we can observe the trace stripes and quality of copper and platinum plates on printed circuit boards.
5, agriculture, forestry, food and other departments to observe and study germs and insects.
Use:
1. Enlarge the image of an object-the main function of a magnifying glass.
Put the magnifying glass in front of the object at an appropriate distance, and watch the magnified image from the lens. Pay attention to the fact that the object is not actually magnified.
2, pay attention to fire protection-secondary function
Under strong light, the focal part of the lens will be particularly bright, and the focal part will zoom or catch fire.
Extended data:
Students observe the creatures on campus with a magnifying glass, and observe flowers and insects under the guidance of teachers in the experiment.
It is a gaze device for people with poor eyesight, and it is also suitable for electronic product inspection, circuit board inspection, stamp collectors' appreciation of identification stamps, jewelers' identification of jewelry, public security personnel's observation of fingerprints and hair fibers, agricultural technicians' observation of artificially pollinated stamens, and craftsmen's work of making miniature handicrafts.
Baidu encyclopedia-magnifying glass