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Type Diode
Types of Laser Hair Treatments
In recent years, laser treatment has become a popular choice for people wishing to remove unwanted hair. Laser treatments have been improved making treatment safer and much less discomforting. Lasers can be performed on all skin types and colors and they can be used on any area of the body that has excess hair.
Laser hair removal works by targeting the pigment contained in the hair follicle. Melanin is the pigment that causes the hair to be light or dark. People with light hair have less melanin so it is more difficult to remove hair. The hair follicles contain cells under the skin that cause the hair to grow. The laser heats up and vaporizes the follicle which damages and removes the hair
The following are several laser hair treatment methods one should consider before undergoing treatment:
Ruby Laser: The Ruby Laser is the earliest hair removal method. It works well on light and fine hair. The method is less effective with people who have darker skin because of the larger amount of melanin that is present. As well, it is not recommended for people who require a large area of air to be removed. The red color at 694nm can be is effectively absorbed by the melanin.
Alexandrite Laser: The Alexandrite Laser is very effective at treating large area of the body containing excess hair. It is also popular with people who have fair skin. It is the one of the fastest methods of removing hair. When using the laser, a reddish light is created and carries a deep penetration rate. It produces a high repetition speed and it can cover up to an 18mm laser spot area on the skin. It can often take about 30 minutes or less to complete an alexandrite laser treatment of the whole back.
Diode Laser: The Diode Laser is one of the best methods of removing hair on dark skin. It is not very useful on lighter skin. It produces a long wavelength allowing for a more deep penetration of the pigment. The laser diode dispenses an invisible light at about 800 nm. It is effective on large areas of the skin. The repletion rate is fast allowing for a shorter treatment time.
Long Pulse Nd: Yag Laser: The Long Pulse Nd: Yag laser is effective on a number of skin types. However, it is more effective on darker skin. Larger areas can be treated because of the quick repetition rates.
Intense Pulsed Light Devices: Although not actually lasers, they are considered a laser equivalent. They use a method called selective photothermolysis to remove hair. They produce non-coherent light of many different wavelengths. The light energy has shorter wavelengths; therefore treatment of darker skin is less effective. They are also a bit more complicated to use.
Improvements in laser hair removal methods have resulted in an increased demand for the treatment. Before undergoing treatment, you need to know what it in involves and what kind of treatment will match your skin type. It is important to remember that you will have to have several treatments to achieve optimum results. If you are considering laser treatment as a getting rid of excess hair, you should consult with a laser treatment practitioner to get a better understanding of its benefits and what you need to know before going through the hair removal treatment.
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What would happen / What would be the output if we apply a digital signal (supply) to any type of diode ?
What would happen / What would be the output if we apply a digital signal (supply) to any type of diode ?
thanks
It depends upon which way the diode is placed in the circuit. If the diode is positioned such that it is blocking, there will be no voltage on the other leg of the diode. Reversing the diode will allow it to conduct and you will have an output voltage of the power supply minus the voltage drop of the diode(typically 0.7 v)
How National Diodes are Marked
