NV15VFR
Variable frame rate SPAD sensor
- 480 x 320 SPAD pixels
- Event-based readout
- Global shutter
- On-chip pixel binning
- Adjustable event threshold
The NV15VFR variable frame rate single-photon avalanche diode (SPAD) sensor was developed for applications requiring high sensitivity and/or frame rate but with reduced output bandwidth.
The system combines benefits of a SPAD imager, namely the single-photon resolution and fast operating speeds, with those of an event sensor – low output data rates.
The innovative sensor architecture streams photon events detected during an exposure cycle down to nanosecond timestamp resolution with reduced latency over a simple parallel interface.
The sensor only sends out the pixels which have registered a photon event during the exposure period and can immediately proceed to the next acquisition cycle when all the events are accounted for. The threshold for generating an event can be adjusted from 1 to 15 photons, depending on the pixel binning scheme. This photon event-driven output reduces the system output data rate and power consumption.
If a fixed frame rate is desired, the sensor can remain inactive after the event readout is finished until the appropriate time interval has passed.
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