Combined diffractive optical elements with adjustable optical properties controlled by a relative rotation: tutorial.

Area of Science:

• Optics and Photonics
• Optical Engineering

Background:

• Diffractive optical elements (DOEs) are crucial for miniaturized optical systems.
• Controlling the optical properties of DOEs dynamically remains a challenge.

Purpose of the Study:

• To present a novel design for tunable diffractive optical elements (DOEs) using adjacent elements.
• To explore various applications and performance limitations of this tunable DOE concept.

Main Methods:

• Combining two transmissive diffractive optical elements (DOEs) in close proximity.
• Implementing relative motion (translation or rotation) between the DOEs to alter optical properties.
• Analyzing tunable diffractive lenses, axicons, vortex plates, and aberration correctors.
• Investigating diffraction efficiency and tuning range limitations.
• Utilizing multi-order DOEs to mitigate chromatic aberrations.

Main Results:

• Demonstrated tunable optical properties, including adjustable focal length for diffractive lenses.
• Successfully implemented the principle in various optical devices like axicons and vortex plates.
• Identified limitations in the tuning range and diffraction efficiency.
• Showcased suppression of chromatic aberrations using multi-order DOEs.

Conclusions:

• Adjacent DOEs offer a versatile platform for creating dynamically tunable optical devices.
• This approach enables the development of advanced optical components with adjustable functionalities.
• Further research can optimize performance and expand applications for tunable DOEs.