Demonstration of image-zooming capability for diffractive axicons

Area of Science:

• Optics and Photonics
• Optical Engineering

Background:

• Classical lenses produce a focal point, limiting imaging depth.
• Diffractive axicons generate achromatic nondiffracting beams, creating a focal line instead of a point.
• This focal line property offers an extended focal depth.

Purpose of the Study:

• To demonstrate a simple imaging system utilizing a diffractive axicon.
• To design a linear variable zoom system with minimal optical components.

Main Methods:

• Utilizing a diffractive axicon as the sole optical component.
• Translating the diffractive axicon to achieve variable zoom.

Main Results:

• The diffractive axicon successfully produced a linear focal line.
• A functional imaging system with linear variable zoom was demonstrated.
• The system achieved magnification adjustment by translating the axicon.

Conclusions:

• Diffractive axicons offer a unique solution for creating long focal depth imaging systems.
• The proposed system provides a simple and effective linear variable zoom capability.
• This approach simplifies optical design for applications requiring adjustable focal depth.