Large aperture adaptive doublet polymer lens for imaging applications.

Area of Science:

• Optics and Photonics
• Materials Science
• Mechanical Engineering

Background:

• Traditional optical systems often rely on rigid glass elements, limiting adaptability.
• Developing adaptive lenses with variable focal lengths is crucial for advanced optical applications.
• Fluidic lenses offer a promising avenue for creating tunable optical components.

Purpose of the Study:

• To present the complete design, fabrication, and characterization process of adaptive doublet polymer lenses.
• To develop and utilize a first-order model for designing fluidic doublets.
• To experimentally validate the performance of these adaptive lenses against numerical models.

Main Methods:

• Finite element modeling was employed for the lens design.
• Adaptive doublet lenses were fabricated with two constant-volume fluidic chambers and three flexible membranes.
• Experimental characterization involved measuring chromatic focal shift over a range of focal lengths.

Main Results:

• A variable focal length doublet lens with a 19.0 mm clear aperture was successfully created.
• Numerical modeling was compared with experimental measurements of chromatic focal shift.
• The lenses demonstrated a positive focal length range from 55 mm to 200 mm (f/2.89 to f/10.5).

Conclusions:

• The study successfully demonstrates a full design-to-characterization workflow for adaptive doublet polymer lenses.
• The fabricated fluidic lenses exhibit tunable focal lengths, validating the design approach.
• This work paves the way for adaptable and reconfigurable optical systems using polymer-based fluidic optics.