Exploring the Glass Frosting Process of Nanosecond UV Lasers

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Introduction to the Prospects of Nanosecond UV Laser in Glass Frosting

Glass, as an amorphous inorganic non-metallic material, is transparent and smooth, widely used in the production of various items and decorative crafts such as doors and windows. In modern daily life, production, and scientific fields, glass has become an essential material. With the development of society and the growing awareness of environmental protection, there are higher demands for frosting glass products. Nanosecond UV laser processing of glass frosting offers advantages such as controllable texture, high efficiency, stable operation, and simple procedures. It is expected to gradually replace or supplement traditional processing methods.

Glass Frosting Overall Image

3C Marking Image

 

Comparison between Laser Glass Frosting and Traditional Sandblasting

 

Processing Method

Laser Frosting

High-Pressure Sandblasting

Hydrofluoric Acid Chemical Etching Frosting

Cost

Lower cost, initial equipment investment, minimal ongoing costs

Higher cost, expensive purchase of abrasive materials

Moderate cost

Operation

Simple operation, automated process through software settings

Filling abrasive materials, simple process with high-pressure spray gun

Hydrofluoric acid applied to glass surface, suitable for overall frosting, complex local frosting steps

Safety

High safety

Safety hazards exist

High danger, risk of bodily harm

Glass has high chemical stability, while the chemical agents used in chemical etching frosting have certain corrosive properties, posing significant risks to the environment, equipment, and operators. Sandblasting/grinding frosting reduces production yield, slows down efficiency, requires strict process control, and can contribute to environmental pollution. The use of nanosecond solid-state UV lasers for glass surface frosting effectively addresses the pain points of traditional processing, offering rapid efficiency, no pollution, environmental friendliness, and low consumption, thereby driving innovation in glass processing technology and realizing economic value.

Efficiency Comparison between 15W and 30W Laser Glass Frosting

The nanosecond solid-state UV laser operates at a wavelength of 355nm, with high absorption of UV laser by glass. Due to the small focused spot and high energy density, UV processing for glass frosting achieves finer results.

Testing Platform Information

Laser Source

15w and 30w

Beam Expander

15w(355 10X)   30w(355 8X)

Output spot 5mm

Field Lens

F=254

Scanning Mirror

SCANLAB 10mm

Control Card

Golden Orange Second Generation

Due to the inherent brittleness of glass, improper control of laser energy parameters can lead to the expansion of microcracks, thermal cracking, or severe edge collapse on the glass surface. To achieve varying levels of opacity, light transmittance, roughness, and aesthetic surface effects, it is imperative to carefully select and adjust the appropriate laser processing parameters.

Laser Frosting Process Parameters

Processing Parameters

15W

30W

Marking Speed (mm/s)

700

1300

Frequency (kHz)

60

80

Pulse Width (us)

2

2

Fill Type

Arch-shaped

Arch-shaped

Fill Spacing (mm)

0.07

0.08

 

Efficiency Comparison Image

 Surface Roughness Testing Image

With consistent frosting effects, we compared the efficiency of frosting using 15W and 30W lasers. The results show that the higher power laser achieves approximately 2.5 times higher efficiency than the 15W laser. The 30W UV high-power laser, with its greater single pulse energy, improves output frequency and processing speed, making it more efficient and cost-effective in glass frosting applications.

Conclusion

30W UV Laser Appearance Image

No.

Parameter Name

Parameter Value

Unit

1

Center Wavelength

355

nm

2

Maximum Pulse Energy

>750 (@40kHz)

μJ

3

Output Power

>30 (@40kHz)

W

4

Frequency Adjustment Range

30~200

kHz

5

Pulse Width

10~40(15±2ns@40kHz)

ns

6

Output Power Stability

< 3% RMS

 

7

Pulse Stability

<3% RMS

 

8

Beam Quality M2

< 1.3

 

9

Beam Mode

TEM00

 

10

Beam Circular Degree

>90

%

11

Polarization Direction

Horizontal

 

12

Spot Diameter (6x Beam Expander)

5±0.5

mm

13

Divergence Angle

<2

mrad

14

Pointing Stability (8h)

<25

urad/°C

15

Laser Size

480210135.8

mm³

30W UV Product Overview:

  • Designed with water cooling circuits for precise cooling of each heating point.
  • Special doping of conventional crystals to enhance the thermal conductivity of gain crystals, effectively controlling crystal heat effects.
  • Optimal thermal stability achieved through multiple rounds of thermal simulation and practice.
  • Stable power output achieved through a reasonable coupling and cavity design.

About GZTECH

GZTECH is an advanced laser source supplier focused on serving precision manufacturing. With headquarters in Wuhan and five offices nationwide, including branches in Shenzhen and Suzhou, we provide comprehensive services to meet diverse customer needs.

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