US 11,816,259 B2
Methods and systems for forming images of eye features using a non-imaging, scanning-MEMS-based eye-tracking system
Nino Zahirovic, Waterloo (CA); Brendan Redmond O′Hanlon, Prescott (CA); Fan Yang, London (CA); and Niladri Sarkar, Waterloo (CA)
Assigned to AdHawk Microsystems Inc., Waterloo (CA)
Filed by AdHawk Microsystems Inc., Waterloo (CA)
Filed on Jan. 19, 2023, as Appl. No. 18/098,899.
Application 18/098,899 is a continuation of application No. 17/673,337, filed on Feb. 16, 2022, granted, now 11,586,285.
Claims priority of provisional application 63/150,312, filed on Feb. 17, 2021.
Prior Publication US 2023/0161408 A1, May 25, 2023
Int. Cl. G06F 3/041 (2006.01); G06F 3/01 (2006.01); G02B 26/10 (2006.01); G02B 26/08 (2006.01)
CPC G06F 3/013 (2013.01) [G02B 26/0833 (2013.01); G02B 26/101 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a first microelectromechanical system (MEMS) scanner for steering a first input light signal in a two-dimensional pattern over a scan region, wherein the first MEMS scanner has a first scanning axis characterized by a first resonant frequency and a second scanning axis characterized by a second resonant frequency;
a detector configuration that is non-imaging and includes at least one discrete detector, wherein the detector configuration is configured to measure an intensity of a first reflected light signal from the scan region and provide the measured intensity as a first detector signal, the first reflected light signal comprising at least a portion of the input light signal;
an analog-to-digital converter (ADC) configured to convert the first detector signal into a digital signal; and
a processor configured to estimate the position of the MEMS scanner over a time period and generate an image of the scan region based on a map correlating the estimated position and the digital signal over the time period.