Guangzhou Delan Laser Technology Co., Ltd. is a professional manufacturer specializing in laser inkjet printers, COâ‚‚ laser marking machines, semiconductor laser marking machines, fiber laser marking machines, and laser coding systems. When using a laser marking machine, the final result largely depends on how the laser parameters are set and how these parameters interact with each other. Before choosing a specific laser wavelength or processing equipment, engineers and technicians must have a thorough understanding of the relationships between various laser parameters. This ensures that the settings are optimized for different materials, leading to superior marking quality.
Here’s an in-depth analysis of key laser marking machine parameters for your reference:
1. **Laser Energy**
The initial step in setting laser parameters involves adjusting the energy per pulse. With modern power supplies, it's possible to control the energy distribution within a single pulse—increasing gradually at the start and decreasing toward the end. This allows for better control over the material interaction and improves the overall processing outcome.
2. **Power Density**
Power density refers to the amount of laser energy delivered to a given area, typically measured in watts per square centimeter. It’s calculated by dividing the pulse energy by the spot area. Since beam quality varies, the actual power density can differ across the same spot. The appropriate power density depends on the material being processed.
3. **M² (Beam Quality)**
M² measures how the laser beam’s energy is distributed. An ideal beam has an M² value of 1, with the highest intensity at the center and a Gaussian distribution outward. Lower M² values (close to 1) are ideal for precision micromachining, while higher M² values (between 30–100) are more suitable for applications like heat treatment and welding.
4. **Pulse Width and Repetition Rate**
Pulse width refers to the duration of each laser pulse, while repetition rate determines how often the pulses occur. Most laser processes operate in pulsed mode, but continuous wave (CW) mode is used for tasks like soldering and heat treatment. Adjusting these parameters affects both the depth and quality of the marking.
5. **Peak Power**
Even if the average power of a laser is relatively low, the peak power during a single pulse can be very high. For example, a 10W laser might have a peak power of 5kW due to the short pulse duration. Peak power is calculated by dividing the pulse energy by the pulse width, and it plays a critical role in material removal efficiency.
6. **Spot Diameter**
The spot size is determined by several factors, including the focal length of the lens, the laser wavelength, the beam quality (M²), and the beam diameter. The formula is:
**Spot Diameter = 2fλM² / D**, where f is the focal length, λ is the wavelength, M² is the beam quality, and D is the beam diameter.
Note that excimer lasers, which have poor beam quality, are typically used with masks rather than focused lenses, making them ideal for applications like silicon chip etching.
Most parameters are interdependent, so careful adjustment is essential. For instance, changing the focal length to alter the spot size will affect the power density unless the total power is adjusted accordingly.
Understanding how these parameters interact is crucial for achieving optimal results, especially as laser technology becomes more advanced and precise. Engineers must analyze each parameter and its impact on material processing to ensure consistent and high-quality outcomes.
For more information about laser technology and solutions, visit Guangzhou Delan Laser — your trusted expert in the laser industry.
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For inquiries, contact Zhao Sheng at 020-66230280.
Also, explore our range of products such as UV laser marking machines, Shantou laser marking machines, Guangzhou COâ‚‚ laser marking machines, and more.
Editor: Hardware Business Network Information Center
Website: http://news.chinawj.com.cn
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