자외선(UV) 레이저 355nm로 유리 조각에 영향을 미치는 요소는 무엇입니까?

평면 유리의 UV 레이저 마킹은 레이저의 피크 출력, 초점이 맞춰진 지점의 크기 및 검류계의 속도와 직접적인 관련이 있습니다.

때때로 고출력 레이저의 빛이 유리 표면을 에칭하지 않고 직접 통과한다는 사실을 발견했습니다. 이는 레이저의 피크 출력이 충분하지 않거나 에너지 밀도가 충분히 집중되지 않았기 때문입니다. 피크 전력은 레이저 크리스탈, 펄스 폭 및 주파수의 영향을 받습니다. 펄스 폭이 좁고 주파수가 낮을수록 레이저의 피크 출력이 높아집니다.

일부는 유리 표면에 새겨질 수 있지만 여전히 새는 현상이 발생하고 펄스에 의해 형성된 일부 점이 유리에 가라앉아 내부 조각을 형성합니다. 이 경우 높은 피크 출력 레이저와 고배율 빔 확장을 사용하여 최적화할 수 있습니다. 처리 효과.

자외선 레이저  | 녹색 레이저  | 자외선 레이저  | 자외선 dpss 레이저  | 나노초 레이저  | UV 레이저 소스  | 고체 레이저

In addition, the time that the laser beam contacts the glass surface also affects the etching effect of the glass surface. Too long contact time may cause the glass surface to be hit too deep, and too short a contact time may cause leakage. We can get better processing results by changing the scanning speed of the galvanometer to an appropriate value. However, it should be noted that the scanning speed is also affected by the frequency of the laser itself, and if the frequency is too low, it will also lead to leakage.

Curved glass

Due to the influence of the bending force, the focal depth of the focusing spot and the scanning method of the galvanometer are particularly important to the processing effect, that is, the peak power of the laser, the focusing spot, the scanning speed of the galvanometer, the scanning method of the galvanometer, the focal depth of the spot and the range of the field lens. etc. affected. When the energy density reaches the standard, we will find that the effect on the glass surface is worse as it goes to the edge, and it cannot even be processed on the surface. The reason is that the depth of focus is too shallow. The focal depth is affected by the M2 factor of the laser beam, the spot size of the beam expander, and the range of the field lens. The magnification of the beam expander and the range of the field lens both affect the focal length. The shorter the focal length, the more concentrated the energy density and the shallower the depth of focus.

Under the 10x beam expansion, the energy density is relatively concentrated and the surface is delicate, but due to the shallow depth of focus, the lasers on both sides do not work on the surface. Under the 8x beam expansion, for the current curved product, the focal depth and energy are more suitable, and the marking effect is better. However, the 6-fold beam expansion focal depth increases and also reduces the energy density, so there are many leaks and the effect is poor.

In conclusion, for such glass materials with large curved surfaces and high hardness, lasers with better beam quality and narrower pulse width should be selected. It is more appropriate to use appropriate beam expanders or 3D zoom galvanometers to process such products. .