Ocean Optics has added
triggering functions to its popular USB2000+ miniature spectrometer to provide
accurate timing and synchronization between the spectrometer and other devices.
Four low-jitter trigger modes and normal (free-running spectral acquisition)
operating modes are now possible. Applications include pulsing a light source
to occur when acquiring a spectra and synchronizing spectral acquisition to
coordinate with samples moving through a process stream or sensors reaching a
certain temperature level.
Triggering
provides precise timing between devices. The USB2000+ can be triggered so that
sending the spectrometer a pulse causes it to do something such as a turn off
or on a light, activate a pulse in a pulsed light source or start or end
spectral acquisition in the spectrometer. For example, in the USB2000+ External
Triggering mode, an event outside the sampling system (such as a button push,
lever activation or laser) electronically pulses the spectrometer's trigger pin
and starts acquisition of the spectra with microsecond accuracy.
The USB2000+
has an onboard programmable high-speed FPGA controller, 22-pin connector and 8
user-programmable digital I/Os. Available operating modes are Normal
(spectrometer continuously acquires spectra) and the four trigger modes:
- External
Software Trigger. While the spectrometer is in free-running mode, data
collected in the period up to the triggering event is transferred to
software.
- External
Hardware Level Trigger. The spectrometer waits for a sharp rise in voltage
on the trigger input pin, and then acquires spectra until the voltage is
removed.
- External
Synchronous Trigger. Spectrometer acquires data from an external trigger
event (such as a push button) until the next time the trigger is
activated, at which time the spectrometer ceases spectral acquisition and
begins a new acquisition. Integration time cannot be set, and is the
effective period between triggers.
- External
Hardware Edge Trigger. The spectrometer waits for a sharp rise in voltage
on the trigger input pin, and then acquires one spectrum. One spectrum
will be acquired for each trigger unless an acquisition is already in
progress.
The USB2000+
is among the most popular miniature spectrometers in the world. Its
small-footprint, high-speed CCD-array design is ideal for a wide range of
applications. Modular optical bench accessories (entrance apertures, order
sorting filters and more) make it possible to configure the USB2000+ for
hundreds of different applications.
To learn more
about USB2000+ triggering, visit
www.OceanOptics.com,
call Ocean Optics World Headquarters at +1 727-733-2447, or e-mail
info@oceanoptics.com.
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