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Optical zoom camera module using two poly-dimethylsiloxane deformable mirrors.

Yu-Hung Huang, Hsiang-Chun Wei, Wei-Yao Hsu

|October 17, 2014

Summary

This summary is machine-generated.

Researchers developed a compact optical zoom system using deformable mirrors made from polydimethylsiloxane. This innovative reflective optics approach enables 2x optical zoom in a thin 10mm module for portable devices.

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Area of Science:

Optics and Photonics
Materials Science
Mechanical Engineering

Background:

Miniaturization is crucial for portable electronic devices.
Traditional motor-driven lens systems for optical zoom are bulky and power-hungry.
Reflective optics offers advantages like path folding and reduced chromatic aberration.

Purpose of the Study:

To develop a compact optical zoom module for portable devices.
To utilize reflective optics with deformable mirrors for zoom functionality.
To overcome the limitations of conventional motor-driven lens systems.

Main Methods:

Employed a deformable mirror as a reflecting element within an optical zoom system.
Utilized polydimethylsiloxane (PDMS) as a deformable membrane due to its low Young's modulus and residual stress.
Constructed an optical zoom module comprising a pair of micromachined deformable mirrors.

Main Results:

Achieved a 2x optical zoom capability within a 10 mm thick module.
The system demonstrated a smallest effective focal length of 4.7 mm at a 52° field angle and f-number of 4.4.
The largest effective focal length achieved was 9.4 mm with an f-number of 6.4.

Conclusions:

A compact, thin optical zoom module was successfully demonstrated using deformable mirrors.
PDMS-based deformable mirrors offer a viable solution for miniaturized optical zoom systems.
This technology advances the design of portable devices requiring optical zoom functionality.