Design and manufacture of diffractive
optical elements

Collimated Beam shaper

Contents

Introduction

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.

Collimated beam shaper

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.

collimated Top hat
collimated laser beam shaper

Specifications of Collimated Top-Hat Module design examples

System description  
Number of optical elements 3 3 2
Material Fused Silica
System length [mm] 210 110* 210
Input parameters  
Wavelength [nm] 532
Beam dia. size [mm] 4
M2 <1.5
Output parameters  
Shape Square Square Rectangular
Size [mm2] 1x1 1x1 1x4
Efficiency >95%
Collimation properties Collimated shape from 50 [mm] after last element along 50 [mm]
*: Compact version

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.

Typical applications:

  • Aesthetic skin treatment
  • Laser welding of polymers
  • Surface treatment
    • Laser cleaning
    • Laser hardening
    • Color ablation/Paint removal
    • Coating removal

Key Advantages of the module

  • Affordable
  • Easy installation and system integration
  • Not sensitive to incident beam parameters
  • Easy customization
collimated homogenizer module animation

Figure 1: 3D animation of module with output propogation on optical axis.

Collimated Homogenizer simulation

Product list

 

Wavelength[nm]

Output shape[mm]

Output size[mm]

Data Sheet

Col_RD-001-Q

532

Round

7.8

Data Sheet

Col_HM-001-I

1064

Square

13.2x13.2

Data Sheet


Data sheet example for standard products:

Optical properties

Value

Wavelength

1064 nm

Incident beam size

<3 mm*

Incident beam mode

MultiMode or Single Mode**

Glass material: DOE/Lens

Fused Silica/ BK7

Collimation length

> 200 mm

Output Shape

Round/Square/Line

Output Size

??x?? mm

Coating

AR/ AR ( specific type of coating)

 

 

Optomechanical properties

 

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

mechanical dimensions collimated homogenizer

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

Collimated Homogenizer with fiber laser

Application idea: Collimated Line Homogenizer

Collimated line intensity is needed for many optical applications, for example:
  • Laser cleaning
  • Laser inspection
  • Ablation
  • Surface modification
  • Debonding
  • 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

Contact Us for more information or for custom solution.
@Copyright 2017, Holo/Or Ltd. P.O.B 1051, Rehovot, 7611001 Israel
Phone: +972-89409687/8, Fax: +972-89409606

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