We know that ionizing radiation usually causes changes in the chemical balance of the cell, and some changes can cause cancer. For example, it causes the damage of DNA in the cells, which may even be inherited to the next generation, resulting in new generation of malformations, congenital leukemia and so on. In a large number of ionizing radiation, the human body may cause lesions in a few hours or days, or cause death. Unlike ionizing radiation, the safety of non ionizing radiation is far less intense or faster than ionizing radiation.
However, if we engage in laser optical glass work, if we do not work strictly in accordance with the laser site or laser operation rules, we will also cause damage to the safety of human body. The intense laser radiation will often interfere with the body's biological clock, resulting in human ecological balance disorders and neurological disorders, headaches, fatigue, sleepiness, agitation, inattention, memory loss, skin fever, hair loss, palpitations, arrhythmia and abnormal blood pressure and other symptoms. Influence of laser radiation on the brain and nervous system, to reduce the secretion of melatonin, circadian rhythm disorder, cause a series of clinical symptoms. Laser radiation can also damage the cell membrane, affect the development of children, cause menstrual disorders and male sexual dysfunction, and even lead to the decrease of sperm count or sperm in male semen. Direct laser radiation will cause permanent damage or even blindness to human vision. Direct laser radiation will also burn people's skin, especially ultraviolet to Blu ray laser.
Xiamen Yi only special optical glass material: imported K9 quartz quartz other optical materials surface finish: 20/10 diameter: 0.0/-0.10mm thickness tolerance: + center + 0.10mm tolerance center: 3-5 arcmin focal length tolerance: + 1% aperture: 1-5 local aperture: 0.2-0.5 aperture: 90% plating film: Broadband antireflection film
(1) the laser should be operated under the condition of good lighting, which can reduce the size of the pupil and reduce the damage to the eye.
(2) not to wear jewellery, because the laser may cause damage to the eye or skin through the reflection of the jewelry.
(3) when the laser is operated, the object that has the mirror reflection must be placed in the right position or simply move away.
(4) the laser beam can not be looked at deliberately.
(5) if there is a potential danger to the laser, it is necessary to stop the work and immediately let the laser safety worker check it.
(6) each laser and laser equipment should provide the operator with the maximum safety protection measures. In general, only 1, 2, 3A level lasers are used for experimental demonstration.
When the retina by laser irradiation intensity greatly, ranging from the optic nerve pain, while in the retinal damage. The human eye is a biological focusing system, and the power density on the retina after focusing can be increased by 2~5 x 105 times than that of the cornea. It is clear that a highly parallel laser must be highly valued for the possible damage to the human eye. Laser damage to the eye is related to laser wavelength, power or energy, pulse width, environment and so on. The greater the power, the shorter the wavelength, the more serious the damage. At night or in the dark room, the pupil is big, the energy that enters the eye is big and the harm is great. The damage of the laser to the skin is mainly the burn. The study showed that the absorption rate of dark skin is higher than that of light color skin, and the absorption rate of skin to CO2 laser is high: the absorbed energy is mainly deposited in the superficial layer of the skin.