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Multi-plane, multi-band image projection via broadband diffractive optics.

Monjurul Meem, Apratim Majumder, Rajesh Menon

|April 1, 2020

Summary

Broadband diffractive-optical elements (BDOEs) project visible and near-IR images. These versatile, efficient elements enable diverse imaging applications and can be mass-produced affordably.

Area of Science:

Optics and Photonics
Materials Science

Background:

Diffractive-optical elements (DOEs) are crucial for manipulating light.
Existing DOEs often have limitations in spectral bandwidth and functionality.

Purpose of the Study:

To demonstrate novel multi-level broadband diffractive-optical elements (BDOEs).
To showcase the versatility of BDOEs for advanced imaging applications.

Main Methods:

Fabrication of non-absorbing, multi-level BDOEs with tailored topography.
Experimental demonstration using broadband illumination for image projection.

Main Results:

Achieved projection of different images in distinct spectral bands and image planes.
Demonstrated image magnification by adjusting source-BDOE distance.

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Developed flat BDOEs using index-contrast coatings and reflective BDOEs.

BDOEs exhibited high efficiency and versatility.

Conclusions:

BDOEs offer a powerful platform for multi-functional imaging.
The demonstrated capabilities are compatible with cost-effective mass manufacturing via imprint lithography.