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Related Experiment Video

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Tunable hyperchromatic lens system for confocal hyperspectral sensing.

Phuong-Ha Cu-Nguyen, Adrian Grewe, Matthias Hillenbrand

|February 12, 2014

Summary

This study introduces a compact hyperspectral sensing system using a diffractive optical element and a fluidic lens. The system efficiently tunes spectral bands across the visible range with rapid response times.

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Area of Science:

Optics and Photonics
Spectroscopy
Microfluidics

Background:

Hyperspectral imaging requires precise spectral selection.
Traditional methods can be bulky and complex.
Compact and tunable spectral filters are needed for advanced sensing.

Purpose of the Study:

To demonstrate a novel confocal hyperspectral sensing approach.
To develop a compact and tunable spectral filtering system.
To integrate a diffractive optical element with a fluidic lens for spectral scanning.

Main Methods:

Combining a diffractive optical element with a tunable membrane fluidic lens.
Utilizing longitudinal chromatic aberration for spectral band selection.
Employing spatial filtering and micro-actuator control for spectral tuning.

Main Results:

Demonstrated a functional hybrid prototype with an electro-magnetic micro-actuator.
Achieved spectral tuning across the visible range (450-900 nm).
Obtained a narrow spectral linewidth (<15 nm) with fast scanning (<40 ms).

Conclusions:

The developed system offers a compact and efficient solution for hyperspectral sensing.
The fluidic lens enables rapid and linear spectral band scanning.
This approach has potential applications in various fields requiring spectral analysis.