SeePhase™ – Phase-Locked Frequency Domain Fluorimeter


The fiber optic fluorescence lifetime (SeePhase™) family systems, based on its proprietary frequency domain “phase-locked” detection technology, allows the remote, real-time identification and measurement of chemical and biological fluorescent markers in the field.

Its compact package, low power operation, state-of-the art data processing and communications architecture and affordable price makes it a very attractive solution for a large number of applications. SeePhase™ system is based on measuring the laser induced fluorescence lifetime of target fluorophores in response to a spatially and temporally modulated laser light excitation signal at eye safe energy levels.

The fluorescence lifetime of the target fluorophores is measured using the principle of “frequency- domain” or “phase-locked” detection.

Model No. 500 1500 500
Monitoring Mode Frequency vs. Time Frequency vs. Time Phase vs Frequency
Frequency Mode Phase-Locked Phase-Locked Frequency Sweep
Fluorescence Lifetime Range 140 μsec- 100 nsec 140 μsec- 100 nsec 140 μsec- 200 nsec
Modulation Frequency Range 20 kHz to 200 kHz 20 kHz to 200 kHz 20 kHz to 100 kHz
Modulation Frequency Resolution 0.1 kHz 0.1 kHz 0.1 kHz
Excitation Source Typ e Light Emitting Diode Laser Diode Laser Diode
Excitation Source Wavelength 250-nm to 850-nm 375-nm to 850-nm 375-nm to 850-nm
Excitation Source Power 4870 mcd 1-mW to200-mW 1-mW to200-mW
Detector Photodiode or PMT PMT 2D-PMT
Emission Wavelength Selection Optical Filter Optical Filter Optical Filter
Remote Sensing Fiber Bundle Collimated Fiber Bundle Imaging Telescope
Fiber Optic Connector Multimode-SMA
Data Display LabView Graphical Interface
Data Communic ation RS -232/USB
Power Supply 12V/500 mA 115/220 VAC External 115/220 VAC External

Key Features

  • Fluorescence/Phosphorescence lifetime
  • Fiber optic excitation and emission collection
  • Remote surveillance (1 km coverage)
  • Airborne and terrestrial coverage
  • Point and imaging detection
  • Microsecond to picosecond response times




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