Collimated Beam Shaper Module is Holo/Or’s tailored solution for applications requiring an extended working distance range or a long depth of focus. The Collimated flat top is the natural complement for our more standard flat top beam shaper element which gives a uniform-intensity beam at a unique specified working distance. With a Collimated Beam Shaper Module, the uniform-intensity beam is maintained with high fidelity, power uniformity, and constant size/shape over an extended working distance range. The shape is well-defined with sharp edges, and it can be round, square, rectangular, elliptical, line or any other dimension suiting the user.
SINGLE MODE INPUT
For single mode input sources, the Collimated Top-Hat will be a good solution for applications such as industrial surface treatment where the working surface can be located at widely varying distances from the laser delivery system. This ensures that the processing will be even and smooth with a clean edge at any working distance suiting the user’s convenience, in the specified range.
HOLO/OR offers a compact module, capable of generating Top hat beams with desired profiles . Our Modules are designed for a 3mm diameter single mode input beam and output a 3mm round or 3X3mm square Top Hat beam. They can be easily customized to accept different beam sizes and can be designed with tailored output shapes such as rectangles or lines.
Specifications of Collimated Top-Hat module
|Mechanical parameters||Square Collimated TH||Round Collimated TH|
|Materials||Fused Silica optics, Anodized Aluminium body|
|Wavelengths [nm]||Any single wavelength in the range 300nm-2000nm|
|Input beam diameter [mm]1||3|
|Size [mm]1||3x3||3mm diameter|
|Collimation properties||Collimated shape at exit along 300 [mm] range|
MULTI MODE INPUT
For multi-mode sources, the Collimated Homogenizer Module is HOLO/OR’s tailored solution for applications requiring a long working distance range. The Collimated Homogenizer is the obvious supplement to our standard diffractive homogenizers which give a shaped intensity beam at a unique specified working distance. The Collimated Homogenizer is a good solution for applications such as industrial surface treatment where the working surface is uneven or located at varying distances from the laser delivery system.
- Aesthetic skin treatment
- Laser welding of polymers
- Surface treatment
- Laser cleaning
- Laser hardening
- Color ablation/Paint removal
- Coating removal
Key Advantages of the module
- Easy installation and
- system integration
- Not sensitive to incident
- beam parameters
- Easy customization
Figure 1: 3D animation of module with output propogation on optical axis.
Data sheet example for standard products:
|Incident beam size||<3 mm*|
|Glass material: DOE/Lens||Fused Silica/ BK7|
|Collimation length||> 200 mm|
|Output Size||??x?? mm|
|Coating||AR/ AR ( specific type of coating)|
|Optomechanical properties||AR/ AR ( specific type of coating)|
|Module length||92.7 mm|
|External Diameter||30.5 mm|
*Smaller beam has better effect on collimation length and shape contrast
**For highly coherent laser beam, speckles will appear
Application idea: Fiber coupled Collimated Homogenizer
The module can be integrated into fiber laser delivery systems by direct connection via fiber collimator. Preferable to use a fiber collimator with a small output beam size (<2 mm). Standard fiber adaptors can be used for fiber interface.
Figure 2: Schematic sketch of the module with fiber
Application idea: Collimated Line Homogenizer
Collimated line intensity is needed for many optical applications, for example:
- Laser cleaning
- Laser inspection
- Surface modification
- Laser 3D scanning
Typically, there is a specific requirement for line length and width; therefore, for prototyping, we suggest a custom solution for a line shape module based on catalogues’ opto-mechanical parts, and for industrial purposes we suggest a custom opto-mechanical solution.
Collimated Line Homogenizer can also be combined with a fiber interface.
Figure 3: Optical sketch for Collimated Homogenizer Line system