Dear STMicroelectronics team,
I would like to suggest including references in your documentation—such as datasheets, application notes, or user manuals—for the VL53L family of time-of-flight range sensors regarding the use of retroreflective surfaces as a technique to enhance signal return levels in feasible applications.
In my experience across multiple VL53L-series devices, even small retroreflective tapes can greatly improve signal strength and extend the usable range, often surpassing performance obtained with standard Lambertian white targets. These retroreflectors significantly improve accuracy and reduce noise, especially at longer distances, where standard targets often yield weaker and noisier returns.
Unfortunately, many users and reviewers are unaware of this option, possibly due to the current documentation emphasizing only white diffuse targets as the ideal case. This can lead to underestimating the sensor’s true potential and, in some cases, favoring less suitable alternatives such as ultrasonic sensors.
Additionally, I’d like to suggest that your firmware or API could be expanded to allow for extended-range operation in situations where signal strength remains sufficient—even beyond the standard maximum distance—potentially limited today only by phase ambiguity rather than actual signal loss.
By acknowledging and supporting retroreflective materials as a design option, you can help product developers unlock the full potential of these sensors, especially in controlled environments where such enhancements are easy to implement.
Thank you for your excellent work and for considering this suggestion.
