Customized Diffractive Optical Elements

We have helped many customers to develop their own Diffractive Optical Element (DOE) or DOE Modules. We have many experience in collimating type or collimating lens free DOE which is often for VCSEL.

There are many applications about Diffractive Optical Element.  Such as,
1. Structured light projector for 3D sensing
2. Face ID
3. IOT
4. Robot control
5. Laser beam shaping for Laser processing machine
6. Security purpose
7. Level, vertical, optical ink lines
8. Lighting for entertainment
9. Optical communication
10. Aiming or targeting 
11. Wavefront correction/ generation
12. Dispersion characteristics of the application
13. Beam splitter

Here is our unique DOE design capability:



1. Full focus projected on an inclined surface (all on focus)

By a near-field design, general algorithms allow the projected image focused on a focal plane parallel to the DOE.
Our algorithm allows the projected image focused on an inclined surface, obtaining the most clear and complete projection pattern.



2. Full focus projected on a curved surface (all on focus)

By a near-field design, general algorithms allow the projected image focused on a flat focal plane.
Our algorithm allows the projected image focused on an inclined and curved surface, obtaining the most clear and complete projection pattern on the surface or a 3D image in space.




3. Auto projection-keystone correction

Oblique projection produces Keystone aberration.  An artificial pre-distortion compensation method is required. Our automatic keystone correction algorithm can correct this oblique projection aberration and avoid any errors caused by artificial pre-distortion method.



4. Diffraction distortion automatic correction

Nonlinear distortion is produced naturally, the bigger the diffraction angle the greater the aberration.
The diffraction aberration can automatically correct , regardless of any pattern.




5. Both near-field and far-field covered in one design

General algorithm can design DOEs for near-field and/or far-field applications, but not both in the same piece of DOE.
However, our algorithm can design patterns for both near-field and far-field applications in a single piece of DOE.




6. Multiple planes design at different distances

Whether near-field or far-field design, a general algorithm is usually for one focal plane parallel to the surface of the DOE.
Our algorithm is able to design a DOE which simultaneously projects multiple planar patterns with different distances and angles to its surface.




7. Obliquely incident beam

Usually, the incident beam is perpendicular to the surface of DOE.  Yet our algorithm can make the DOE accept any incident angle.  Therefore, the optical system design using the DOE can be more flexible.




8. Non-fixed cell size

Generally, the cell size of DOE design is fixed. Our algorithm can design different cell sizes in both X and Y directions.
This particular technique can reduce the periodic noise generated by the periodic structure, to improve the projection quality of the DOE.

Application: laser beam shaping optics, diffractive diffuser, DOE diffuser, diffractive grating, structured light projector, DOE Laser module, 850nm or 940nm DOE VCSEL module, random dots laser module, laser beam shaper, beam splitter, diffractive optics and diffractive lens.  

The required information and our evaluation process are as follows.