Method of controlling illumination pulses to increase dynamic range in bioptic imager barcode scanner

A method for controlling a workstation that includes an imaging sensor having an array of photosensitive elements with a field of view, the method comprising:

• energizing a first illuminator to illuminate a first subfield of view with a first illumination pulse and subsequently energizing the first illuminator to illuminate the first subfield of view with a second illumination pulse;
• energizing a second illuminator to illuminate a second subfield of view with a third illumination pulse and subsequently energizing the second illuminator to illuminate the second subfield of view with a fourth illumination pulse, the first subfield of view and the second subfield of view being split from the field of view of the imaging sensor;
• reflecting returned light entering the first subfield of view to impinge upon a first group of the photosensitive elements in the imaging sensor and concurrently reflecting returned light entering the second subfield of view to impinge upon a second group of the photosensitive elements in the imaging sensor;
• exposing the array of photosensitive elements in the imaging sensor for a first sensor-exposure time and subsequently exposing the array of photosensitive elements in the imaging sensor for a second sensor-exposure time;
• processing an image captured by the imaging sensor to decode a barcode in the image;
• wherein the first illumination pulse overlaps with the first sensor-exposure time for a first overlapped-pulse-duration, and the second illumination pulse overlaps with the second sensor-exposure time for a second overlapped-pulse-duration, with the first overlapped-pulse-duration being different from the second overlapped-pulse-duration;
• and
• wherein the third illumination pulse overlaps with the first sensor-exposure time for a third overlapped-pulse-duration, and the fourth illumination pulse overlaps with the second sensor-exposure time for a fourth overlapped-pulse-duration, with the third overlapped-pulse-duration being different from the fourth overlapped-pulse-duration.