What is the best wavelength for hair removal?

What is the best wavelength for hair removal?

Long-term results with the 800 nm lasers suggest that they are very effective for removal of dark hair (Sanchez et al., 2002; Alai and Saemi, 2009). By striking the optimal balance for absorption in various skin chromophores, the wavelength of the Nd:YAG laser is widely recognized as ideal for laser hair reduction.

What is nm in laser hair removal?

A LASER (light amplification by stimulated emission of radiation) works by emitting a wavelength of high energy light, which when focused on a certain skin condition will create heat and destroy diseased cells. Wavelength is measured in nanometres (nm). Various kinds of lasers are available for use in skin surgery.

What is Photothermolysis?

Selective photothermolysis (fō’tō-thĕrm-ol’i-sis) is a precise microsurgery technique used to target tissue in a specific area. It matches the specific wavelength of light and heats the tissue and destroys it with a laser without affecting or damaging surrounding tissue.

Which laser is best for thick hair?

Nd:YAG Laser hair removal

• The most effective laser for reducing very coarse, thick hair.
• The Nd: YAG laser protects darkly pigmented epidermis by bypassing it and targeting the hair follicle.
• As melanin scarcely absorbs Nd:YAG laser light, all skin tones can be treated with this laser, including very dark tones.

Which laser has the most absorption into melanin?

Both of these wavelengths are in the therapeutic or optical window and are effective for laser therapy. Since melanin absorption dominates at lower wavelengths, 980 nm is better for maximal penetration for skin with melanin.

Why longer wavelengths are used for hair reduction?

Longer wavelength lasers theoretically bypass the epidermis to reach their target deep at the bulb or the bulge of the hair follicle. Thus, not only are the long wavelengths less selective for epidermal melanin, they also penetrate deeper to further diminish the risk of epidermal damage.

What are the levels of laser hair removal?

The five most common types of hair removal laser systems include the Ruby, Alexandrite, IPL, Diode, and Nd:YAG. Each laser system is different from the other. Some lasers are better for certain types of hair.

What is considered an acceptable spot size for laser hair removal?

Practitioners should use a laser spot size of approximately 1 cm2 to treat pesky neckbeards, stubborn hair above the lip, and unwanted hair between the eyebrows. A smaller spot size allows practitioners to be more precise and avoid treating areas where the patient is already satisfied.

How old is laser hair removal?

Laser hair removal is the process of hair removal by means of exposure to pulses of laser light that destroy the hair follicle. It had been performed experimentally for about twenty years before becoming commercially available in 1995 and 1996.

Which laser wavelength is best absorbed by hemoglobin?

Haemoglobin has absorption coefficient curve with peaks at 418 nm, 524 nm, 577 nm and again at 1064 nm [Figure 1]. At the first and second peaks the melanin absorption is also very high and therefore these wavelengths can not be used. However, the spectrum between 580 nm and 590 nm is useful clinically.

What is the strongest laser for hair removal?

The best professional laser hair removal equipment is the Dual Accento laser. As discussed in this article the best laser wavelengths are 755 nm alexandrite and 1064 Nd:Yag. These laser wavelengths are the best because they provide premium beam technology and laser hair removal treatments for all skin types.

Is Alexandrite laser better than diode?

Although Diode can treat patients with slightly darker skin tones, Alexandrite lasers tend to shine for lighter skinned individuals. Alexandrite laser hair removal studies. Diode lasers use a longer wavelength (usually around 810nm). That results in a deeper penetration of the skin.

What is the wavelength of light in laser treatment?

Lasing is the process of treating a lesion or a condition with lasers or light. Wavelength: The distance between two subsequent peaks or troughs of a light wave. Usually it is expressed in nm (nanometre i.e. 10−9metres)

What are the parameters of a laser?

Parameters: Parameters are the values of wavelength, fluence (see below), number of pulses, pulse duration, pulse delay, repetition rate and spot size which are set on laser or IPL systems to treat a particular condition. Lasing is the process of treating a lesion or a condition with lasers or light.

What are the characteristics of a high coherent laser beam?

Highly coherent laser beam can be more precisely focused. Directionality: All the photons travel in Uni direction. Directionality of the laser correlates with the emission of an extremely narrow beam of light that spreads slowly.

What is the relationship between wavelength and frequency?

Usually it is expressed in nm (nanometre i.e. 10−9metres) Hertz (Hz): A unit of frequency equal to one cycle per second. Frequency (V or f) ∝ (1/ wavelength (Hz) Therefore shorter the wavelength, higher is the frequency and longer the wavelength, lower is the frequency.