New Step by Step Map For diode laser คือ
New Step by Step Map For diode laser คือ
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The electrons go away powering an area referred to as a gap. The electrons inside the conduction band are unstable and can shift into a reduce Electricity band to recombine Using the gap but In addition it releases the Electricity equivalent towards the Electricity drop concerning the valence band and conduction band.
สุดท้ายหลังทำเลเซอร์กำจัดขน จะช่วยทำให้ผิวเรียบเนียนขึ้น และกระชับรูขุมขน
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The best cavity is described by two mirrors dealing with one another — a complete reflector as well as a partial reflector whose reflectance will vary amongst thirty% and shut to one hundred%. Light bounces backwards and forwards amongst these mirrors, getting intensity with Every go through the obtain medium. Photons which are spontaneously emitted in directions other than the axis are simply just lost and don't lead on the laser operation. As laser light-weight is amplified, many of the mild escapes the cavity, or oscillator, from the partial reflector (output coupler); nonetheless, at equilibrium (the so-known as “continual state” or “steady wave”), these “optical losses” are beautifully compensated from the optical get skilled while in the successive round excursion from the photons Within the cavity.
เป็นตุ่มหนังไก่ ขนแข็ง ผิวถลอก รูขุมขนอักเสบ
Which means that Yb-fiber MOPA-variety amplifiers can produce adaptable repetition rates as superior as tens of MHz. When accustomed to pump optical parametric devices, the ensuing output is totally tunable from UV to mid-IR wavelengths, furnishing rewards for applications including spectroscopy of Highly developed components, or purposeful biological imaging. It should be noted that for scientific programs needing really shorter (1 kW) have arrive at dominate metallic reducing diode laser คือ apps inside the four- to six-mm thickness selection since they ordinarily offer you superb results, along with lessen maintenance costs than CO2 lasers of similar energy. Moreover, close to-infrared fiber lasers are beneficial when slicing specific metals, like copper, aluminum, and brass, which might be tricky to Reduce with CO2 as a result of their higher reflectivity inside the significantly-infrared.
แสงเลเซอร์ชนิดนี้สามารถส่งผ่านพลังงานลงไปได้ในผิวหนังชั้นลึก จนถึงรากขน จึงทำให้กำจัดขนได้ดี
ผู้แต่ง : นพ.ชินดนัย วิกรัยพัฒน์ และ พญ.ปัทมา ปาประโคน พบ.วท.ม.ตจวิทยา (ผิวหนัง)
ผู้ที่ต้องการผลลัพธ์ที่ยาวนาน กำจัดขนได้ถาวร
The laser cavity, or resonator, is at the guts in the system. A single transit by means of a collection of enthusiastic atoms or molecules is sufficient to initiate laser motion in certain large-attain devices for example excimer lasers; nonetheless, for some lasers, it is necessary to even more enhance the acquire with a number of passes with the laser medium. This is certainly implemented alongside an optical axis outlined by a list of cavity mirrors that generate opinions (Determine two).
มองแล้วสบายตาดูสวยงาม ใส่เสื้อผ้าและชุดว่ายน้ำได้อย่างมั่นใจ
CO2 lasers keep on for use for even thicker elements, but this is generally because the processes happen to be optimized for this laser and producers are sluggish to alter a output system that actually works well. On the other hand, this is likely to alter over time. CO2 lasers at 1 kW and underneath are still used in a few thinner steel (two to four mm) cutting programs.
Illustrations contain Raman lasers Utilized in telecommunications, quantum cascade lasers used in a few fuel-sensing applications, and chemical lasers, which are generally limited to military services packages.