Ключевые слова: aluminum, applied, astronomy, beam, closeup, college, collimator, danger, design, detail, energy, engineering, equipment, experiment, exploration, field, glass, green, industrial, industry, knowledge, lab, laboratory, laser, lens, light, new, optical, optics, part, perspective, photon, physics, power, precision, prism, red, research, safety, school, science, scientific, selective, shine, structure, study, technology, test, university, violet,