Ultrafast & Precision Laser Micro-Machining
Laser Micro-Drilling & Aspect Ratio CAM Calculator
Precision Gaussian laser beam optics and helical trepanning CAM calculator for aerospace film cooling holes, spinnerets, and fuel injector micro-drilling.
1. Input Parameters
Focusing objective effective focal length
1/e² laser beam diameter entering lens
Desired micro-orifice diameter
Drilled plate thickness (Inconel, Silicon, Ceramic, Stainless)
2. Calculation Results
Focal Spot Diameter (2w_0)
16.4 µm
Rayleigh Range (z_R)
204 µm
Hole Aspect Ratio (AR)
15.0 : 1
Trepanning Orbital Radius (R_trep)
31.8 µm
Hole Wall Taper Angle (θ_taper)
0.65°
Process Feasibility
High (Ultrafast Trepan)
3. Dynamic Visualizer & CAM Preview
4. Engineering Notes & Physics Specifications
Laser micro-drilling utilizes ultrafast picosecond/femtosecond and high-peak nanosecond pulsed lasers to produce micro-orifices in aerospace turbine cooling vanes, spinnerets, automotive fuel injectors, and semiconductor via holes.
- Diffraction-Limited Spot Size: Focused waist diameter $2w_0 = \frac{4 \lambda f M^2}{\pi D_{\text{beam}}}$.
- Rayleigh Range (Depth of Focus): $z_R = \frac{\pi w_0^2}{\lambda M^2}$. When substrate thickness exceeds $2 z_R$, optical beam divergence creates natural hole wall taper ($ heta_{\text{taper}}$).
- Trepanning CAM Toolpath: For hole diameters larger than $2w_0$, circular or helical trepanning orbits ($R_{\text{trepan}} = (D_{\text{hole}} - 2w_0)/2$) provide zero-taper or negative-taper (cylindrical/divergent) hole geometry.
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