HELLO DEAR... meet again in world of work of my blog.Now i will learning about dangers effect laser welding.
LASER WELDING CONCERNS:
1. Eye : Acute exposure of the eye to lasers of certain wavelengths and power can cause corneal or retinal burns (or both). Chronic exposure to excessive levels may cause corneal or lenticular opacities (cataracts) or retinal injury.
2. Skin : Acute exposure to high levels of optical radiation may cause skin burns; while cancer may occur for ultraviolet wavelengths (290-320 nm).
3. Chemical : Some lasers require hazardous or toxic substances to operate (i.e., chemical dye, Excimer lasers).
4. Electrical : Most lasers utilize high voltages that can be lethal.
5. Fire : The solvents used in dye lasers are flammable. High voltage pulse or flash lamps may cause ignition. Flammable materials may be ignited by direct beams or specular reflections from high power continuous wave (CW) infrared lasers.
* What are the effects of laser energy on the eye?
* Laser light in the visible to near infrared spectrum (i.e., 400 - 1400 nm) can cause damage to the retina resulting in scotoma (blind spot in the fovea). This wave band is also know as the "retinal hazard region".
* Laser light in the ultraviolet (290 - 400 nm) or far infrared (1400 - 10,600 nm) spectrum can cause damage to the cornea and/or to the lens. * retinal damage may be associated with an audible "pop" at the time of exposure. Visual disorientation due to retinal damage may not be apparent to the operator until considerable thermal damage has occurred.
Skin Hazards
* Exposure of the skin to high power laser beams (1 or more watts) can cause burns. At the under five watt level, the heat from the laser beam will cause a flinch reaction before any serious damage occurs. The sensation is similar to touching any hot object, you tend to pull your hand away or drop it before any major damage occurs.* With higher power lasers, a burn can occur even though the flinch reaction may rapidly pull the affected skin out of the beam. These burns can be quite painful as the affected skin can be cooked, and forms a hard lesion that takes considerable time to heal.* Ultraviolet laser wavelengths may also lead to skin cancer.
Lasers operate in the ultraviolet, visible, and infrared.
High power lasers can cause skin burns.
Lasers can cause severe eye injuriesresulting in permanent vision loss.Studies of laser accidents have shown that there are usually several contributing factors. The following are common causes of laser injuries:
• Inadequate training of laser personnel• Alignment performed without adequate procedures• Failure to block beams or stray reflections• Failure to wear eye protection in hazardous situations• Failure to follow approved standard operating procedures or safe work practices
HELLO DEAR... meet again in world of work of my blog.Now i will learning about dangers effect laser welding.
LASER WELDING CONCERNS:
1. Eye : Acute exposure of the eye to lasers of certain wavelengths and power can cause corneal or retinal burns (or both). Chronic exposure to excessive levels may cause corneal or lenticular opacities (cataracts) or retinal injury.
2. Skin : Acute exposure to high levels of optical radiation may cause skin burns; while cancer may occur for ultraviolet wavelengths (290-320 nm).
3. Chemical : Some lasers require hazardous or toxic substances to operate (i.e., chemical dye, Excimer lasers).
4. Electrical : Most lasers utilize high voltages that can be lethal.
5. Fire : The solvents used in dye lasers are flammable. High voltage pulse or flash lamps may cause ignition. Flammable materials may be ignited by direct beams or specular reflections from high power continuous wave (CW) infrared lasers.
* What are the effects of laser energy on the eye?
* Laser light in the visible to near infrared spectrum (i.e., 400 - 1400 nm) can cause damage to the retina resulting in scotoma (blind spot in the fovea). This wave band is also know as the "retinal hazard region".
* Laser light in the ultraviolet (290 - 400 nm) or far infrared (1400 - 10,600 nm) spectrum can cause damage to the cornea and/or to the lens. * retinal damage may be associated with an audible "pop" at the time of exposure. Visual disorientation due to retinal damage may not be apparent to the operator until considerable thermal damage has occurred.
Skin Hazards
* Exposure of the skin to high power laser beams (1 or more watts) can cause burns. At the under five watt level, the heat from the laser beam will cause a flinch reaction before any serious damage occurs. The sensation is similar to touching any hot object, you tend to pull your hand away or drop it before any major damage occurs.* With higher power lasers, a burn can occur even though the flinch reaction may rapidly pull the affected skin out of the beam. These burns can be quite painful as the affected skin can be cooked, and forms a hard lesion that takes considerable time to heal.* Ultraviolet laser wavelengths may also lead to skin cancer.
Lasers operate in the ultraviolet, visible, and infrared.
High power lasers can cause skin burns.
Lasers can cause severe eye injuriesresulting in permanent vision loss.Studies of laser accidents have shown that there are usually several contributing factors. The following are common causes of laser injuries:
• Inadequate training of laser personnel• Alignment performed without adequate procedures• Failure to block beams or stray reflections• Failure to wear eye protection in hazardous situations• Failure to follow approved standard operating procedures or safe work practices
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