The professional Wood lamp is also called the Woods lamp, and the English name is WOOD lamp. It emits ultraviolet light at a wavelength of 320-365 nm and is commonly used in beauty salons or hospitals for skin testing.
The German lamp is very helpful in judging the subtle difference of pigmentation. Melanin absorbs the whole-wavelength ultraviolet light. If the melanin is reduced, the refractive power is strong, and the light color is bright, while the melanin is increased, the refractive index is weak and the dark color is dark. Wood lamp can be used to check the depth of melanin in the skin, such as checking the pigment damage of the epidermis (such as freckles), the pigment can be seen deeper when irradiated, and the pigment in the dermis is not, so the position of melanin can be determined. .
Under the Wood lamp, the change in pigmentation of vitiligo is much more pronounced than in visible light, while the change in dermal pigment is not obvious under Wood light. Vitiligo exhibits bright white or bluish fluorescence under the Wood lamp, which is related to the accumulation of a substance called oxidized pterin in the skin of vitiligo, which itself also indicates localized peroxide removal barriers in vitiligo. The material of the accumulated oxidized pterin exhibits a special fluorescence under the long-wave ultraviolet light of the Wood lamp. But not all vitiligo can show significant fluorescence under the Wood lamp, either strong or weak, and there are differences between individuals.
Skin performance under Wood light
*Brown is a healthy skin, whitening and aging horny;
*Lavender is a sensitive skin that is prone to inflammation;
* dark brown or brown is pigmented;
* dull blue-violet is dry skin;
*Orange is the skin that is secreted by acne and oil glands;
* Light yellow is the performance of acne pus;
* White pityriasis has no obvious fluorescence and does not become significantly more pronounced than fluorescence;
* No pigmentation, no fluorescence or weak fluorescence;
* Anemia, no fluorescence;
*Hidden vitiligo has strong fluorescence;
* Normal skin sometimes shows fluorescence, which is caused by dust or residual cosmetics or drugs attached to the skin.
Method of operation
1. Some soaps, cosmetics, including some external medicines, have a fluorescent reaction. To prevent erroneous judgment, the skin to be tested must be washed with water before the Wood lamp;
2, to use in a darker room;
3. Scan the wood light power-on light and illuminate it 3-10 cm from the skin;
4. Only observe the diseased skin or suspicious parts when irradiating, try to avoid long-term direct view of the lamp;
5, if you want to take pictures, you must use the camera, do not use the phone's camera function, turn off the flash, use the close-up function, the aperture is large, it is best to match the tripod.
The lamp requires a 4xAA battery, because the air express is forbidden to transport the battery, so please bring your own.
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