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Advanced imaging with dynamic focus and extended depth using integrated FR4 platform.

Serhan O Isikman1, Samuel Varghese, Fahd Abdullah

  • 1Department of Electrical Engineering, Koç University, Rumelifeneri Yolu TR-34450 Sariyer, Istanbul, Turkey.

Optics Express
|September 23, 2009
PubMed
Summary
This summary is machine-generated.

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This study presents an integrated scanned beam imaging system on a single platform, achieving a 52-degree scan angle and dynamic focusing for extended detection ranges up to 600 mm.

Area of Science:

  • Optoelectronics
  • Micromechanics
  • Optical Engineering

Background:

  • Traditional scanned beam systems often face limitations in dynamic range and focusing capabilities.
  • Integration of optical components with electronics on a single platform presents engineering challenges.

Purpose of the Study:

  • To demonstrate a novel two-degrees-of-freedom scanned beam imaging system.
  • To achieve a large dynamic range and dynamic focusing using an integrated optomechanical design.
  • To showcase high integration of electronics, optoelectronics, optics, and micromechanics on a single platform.

Main Methods:

  • Developed a scanned beam system with components integrated on a Flame-Retardant 4 (FR4) substrate.
  • Implemented a 52-degree scan angle at a 60 Hz resonant frequency.

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  • Achieved dynamic focusing by moving the laser 250 µm in the out-of-plane direction.
  • Engineered collection optics to manage signal strength and avoid detector saturation over a wide range.

    • Main Results:

    • Demonstrated a 52-degree scan angle at 60 Hz resonant frequency.
    • Achieved dynamic focusing with a 250 µm out-of-plane laser movement.
    • Extended the detection range from contact distance to 600 mm, with potential for up to 1 meter.
    • Maintained a collected power variation of only a factor of 30 over the extended detection range.
    • Achieved high signal-to-noise ratio and effective ambient light rejection.

    Conclusions:

    • The demonstrated system represents a significant advancement in integrated scanned beam imaging.
    • The high degree of integration on a single platform offers a compact and efficient solution.
    • The system's large dynamic range and dynamic focusing capabilities open new application possibilities.