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FOCUS-RONAR; F=58MM/WL=1064+532N |
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FOCUS-RONAR; F=122MM/WL=1064+532 |
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FOCUS-RONAR; F=77MM/WL=1064+532N |
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FOCUS-RONAR, F=90MM/WL=1064+532N |
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Focus lenses are critical components in laser systems that control beam convergence by manipulating light waves. Defined as optical elements designed to focus laser beams onto a target surface, they enable precision in energy delivery. Their importance spans industries including manufacturing, medical technology, telecommunications, and scientific research, where accurate beam control directly impacts process efficiency and quality.
| Type | Key Features | Applications |
|---|---|---|
| Plano-Convex Lenses | Flat one side, spherical convex surface; low spherical aberration | Laser cutting, imaging systems |
| Double Convex Lenses | Symmetric curvature; high convergence efficiency | Low-divergence beam focusing |
| Meniscus Lenses | Concave-convex design; reduces spherical aberration | IR laser systems, thermal imaging |
| Achromatic Lenses | Multi-element design; corrects chromatic aberration | Multispectral laser systems |
Typical focus lenses consist of:
- Optical Substrate: Materials like fused silica (UV applications), N-BK7 glass (visible range), or ZnSe (CO lasers)
- Anti-Reflective Coating: Multi-layer dielectric films to minimize surface reflections (e.g., 0.1% @ 1064nm)
- Mechanical Housing: Precision mounts with thermal stability for alignment retention
- Surface Quality: 10-5 scratch-dig specifications for high-power laser compatibility
| Parameter | Description |
|---|---|
| Focal Length (mm) | Determines beam convergence angle; tolerance 1% typical |
| Numerical Aperture (NA) | (n sin ) defines light-gathering ability; 0.1-0.7 range |
| Damage Threshold (J/cm ) | Surface resistance to high-energy pulses; >50 J/cm for Q-switched lasers |
| Transmission Efficiency | 90-99.5% depending on coating and material |
| Surface Irregularity | /10 @ 633nm for precision wavefront control |
Industrial: Laser welding (IPG Photonics systems), semiconductor wafer dicing
Medical: LASIK eye surgery (Carl Zeiss Meditec), photodynamic therapy
Research: Ultrafast laser compression (Ti:Sapphire systems), interferometry
Telecom: Fiber optic coupling (Thorlabs' C Series lenses), free-space optical communication
| Manufacturer | Key Products |
|---|---|
| Edmund Optics | 59-877 Techspec C Series Achromats |
| Thorlabs | LA1431-B Broadband Achromatic Lens |
| Coherent | High-energy CaF Focus Lenses |
| Schneider Optics | Apochromatic Laser Scan Lenses |
Key considerations include:
1. Match material transmission range to laser wavelength (e.g., ZnSe for 10.6 m CO lasers)
2. Calculate required NA for focal spot size: NA = /(2 spot size)
3. Verify damage threshold exceeds system peak power density
4. Environmental factors: Choose thermal-stable substrates for high-duty-cycle operations
Current developments include:
- Increased demand for ultrafast laser optics (sub-100fs pulse compatibility)
- Metasurface-based flat lens prototypes for AR/VR integration
- AI-driven lens design optimization reducing aberration correction time by 40%
- 65% CAGR in high-power industrial lens market driven by EV battery manufacturing