# US 2025/0355094 A1 · Scanning profiles with intra-scan temporal optimization for lidar sensing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0355094 A1 - Document ID: US20250355094A1 - Status: Published application - Kind: A1 - Application number: 19/058,634 - Filed: 2025-02-20 - Published: 2025-11-20 - Earliest claimed: 2024-05-17 - Assignees: Microvision, Inc. - Applicants: Microvision, Inc. - Inventors: Rejin Joy; Prerit Pramod; Christopher Brian Adkins; Tim Niedermeyer; Jeremey Simpson; Jonathan Cross - Web page: https://patentgrep.com/patent/US20250355094A1 ## CPC - G01S 7/4865: Time delay measurement, e.g. time-of-flight measurement, time of arrival measurement or determining the exact position of a peak (peak detection in noise, signal conditioning G01S7/487) - G01S 7/4817: {relating to scanning} - G01S 7/484: Transmitters - G01S 17/10: using transmission of interrupted, pulse-modulated waves (determination of distance by phase measurements G01S17/32) - G01S 17/42: Simultaneous measurement of distance and other co-ordinates (indirect measurement G01S17/46) - G01S 17/931: of land vehicles - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES ## Abstract Aspects of the subject disclosure may include, for example, a light detection and ranging system that includes a laser light source, scanning mirrors, light-sensitive devices, and time-of-flight measurement circuits. The angular velocity of the scanning mirrors is adjusted in a region of interest to modify resolution. A scanning mirror on a fast scan axis slows down entering the region and speeds up exiting, while a scanning mirror on a slow scan axis does the opposite. The system may also increase a laser pulse repetition rate in the region of interest for enhanced data acquisition. Other embodiments are disclosed. ## Claims ### Claim 1 A light detection and ranging system comprising: a laser light source; at least one light sensitive device; at least one time-of-flight measurement circuit responsive to the at least one light sensitive device; a first scanning mirror assembly to scan light received from the laser light source on a trajectory in a field of view, the trajectory including a first trajectory component in a fast-scan direction and a second trajectory component in a slow-scan direction, wherein the field of view includes a region of interest in the field of view, and wherein the second trajectory component speeds up entering the region of interest and slows down exiting the region of interest; and a second scanning mirror assembly to synchronously scan with the first scanning mirror assembly and deposit reflected light energy from the field of view on the at least one light sensitive device. ### Claim 2 (depends on 1) The light detection and ranging system of claim 1, wherein the light received from the laser light source comprises light pulses having a time difference therebetween, and wherein the time difference is smaller inside the region of interest than outside the region of interest. ### Claim 3 (depends on 1) The light detection and ranging system of claim 1, wherein the laser light source is responsive to a laser light control signal, and wherein the laser light control signal causes the laser light source to increase a laser light pulse repetition rate inside the region of interest. ### Claim 4 (depends on 1) The light detection and ranging system of claim 1, wherein the second trajectory component is slowest at an extents of the field of view. ### Claim 5 (depends on 1) The light detection and ranging system of claim 1, wherein the first trajectory component slows down entering the region of interest and speeds up exiting the region of interest. ### Claim 6 (depends on 1) The light detection and ranging system of claim 1, wherein the light received from the laser light source comprises light pulses having a time difference therebetween, and wherein the time difference is smaller inside the region of interest than outside the region of interest, and wherein the laser light source is responsive to a laser light control signal, and wherein the laser light control signal causes the laser light source to increase a laser light pulse repetition rate inside the region of interest. ### Claim 7 (depends on 1) The light detection and ranging system of claim 1, wherein the first scanning mirror assembly comprises first drive circuitry and a first scanning mirror, wherein the first scanning mirror is responsive to a first drive signal produced by the first drive circuitry to scan the light received from the laser light source in the fast-scan direction and a second drive circuitry and a second scanning mirror, wherein the second scanning mirror is responsive to a second drive signal produced by the second drive circuitry to scan the light received from the laser light source in the slow-scan direction, wherein the first drive circuitry includes a look up table to create the first drive signal. ### Claim 8 (depends on 1) The light detection and ranging system of claim 1, wherein the first scanning mirror assembly comprises first drive circuitry and a first scanning mirror, wherein the first scanning mirror is responsive to a first drive signal produced by the first drive circuitry to scan the light received from the laser light source in the fast-scan direction and a second drive circuitry and a second scanning mirror, wherein the second scanning mirror is responsive to a second drive signal produced by the second drive circuitry to scan the light received from the laser light source in the slow-scan direction, wherein the second drive circuitry includes a look up table to create the second drive signal. ### Claim 9 (depends on 1) The light detection and ranging system of claim 1, wherein the first scanning mirror assembly comprises first drive circuitry and a first scanning mirror, wherein the first scanning mirror is responsive to a first drive signal produced by the first drive circuitry to scan the light received from the laser light source in the fast-scan direction and a second drive circuitry and a second scanning mirror, wherein the second scanning mirror is responsive to a second drive signal produced by the second drive circuitry to scan the light received from the laser light source in the slow-scan direction, wherein the first drive circuitry a circuit to sum harmonics to create the first drive signal. ### Claim 10 A system comprising: a laser light source to emit laser light pulses in response to a laser light source control signal; a first scanning mirror to scan the laser light pulses on a fast-scan axis in a field of view in response to a first scanning mirror control signal; a second scanning mirror to scan the laser light pulses on a slow-scan axis in the field of view in response to a second scanning mirror control signal; and a drive circuitry to produce the laser light source control signal, the first scanning mirror control signal, and the second scanning mirror control signal; wherein the field of view includes a region of interest, and the drive circuitry is configured to slow down the first scanning mirror when scanning in the region of interest. ### Claim 11 (depends on 10) The system of claim 10, wherein the drive circuitry is further configured to increase a laser light pulse repetition rate when scanning in the region of interest. ### Claim 12 (depends on 10) The system of claim 10, wherein the drive circuitry includes at least one look-up table used to produce at least one of the laser light source control signal, the first scanning mirror control signal, and the second scanning mirror control signal. ### Claim 13 (depends on 10) The system of claim 10, wherein the drive circuitry is configured to produce the first scanning mirror control signal as a sum of sinusoids. ### Claim 14 (depends on 10) The system of claim 10, further comprising: a light sensitive device to receive reflected laser light pulses; and a time-of-flight measurement circuit coupled to the light sensitive device to determine a time-of-flight of reflected laser light pulses. ### Claim 15 A method comprising: producing a pulsed beam of laser light; scanning the pulsed beam of laser light on a fast-scan axis in a field of view using a first scanning mirror, wherein the field of view includes a region of interest; scanning the pulsed beam of light on a slow-scan axis in the field of view using a second scanning mirror; decreasing an angular velocity of the first scanning mirror when scanning in the region of interest; and increasing a repetition rate of the pulsed beam of laser light when scanning in the region of interest. ### Claim 16 (depends on 15) The method of claim 15, further comprising increasing an angular velocity of the second scanning mirror when scanning in the region of interest. ### Claim 17 (depends on 16) The method of claim 16 wherein the angular velocity of the second scanning mirror is lowest at an extents of the field of view. ### Claim 18 (depends on 15) The method of claim 15, wherein the region of interest is centered in the field of view. ### Claim 19 (depends on 15) The method of claim 15, further comprising: receiving reflections of the pulsed beam of laser light; and measuring times-of-flight of the reflections of the pulsed beam of laser light. ### Claim 20 (depends on 15) The method of claim 15, further comprising: summing a sinusoidal signal with at least one harmonic of the sinusoidal signal to produce a drive signal representing a desired angular velocity of the first scanning mirror; and driving the first scanning mirror with the drive signal.