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1. US20190351873 - PULSED LASER CLEANING OF DEBRIS ACCUMULATED ON GLASS ARTICLES IN VEHICLES AND PHOTOVOLTAIC ASSEMBLIES

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[ EN ]

Claims

1. A cleaning apparatus for a vehicle, comprising:
a beam optics assembly configured to emit a laser beam to irradiate a region on a glass article that is installed in the vehicle;
a debris detection circuitry configured to detect debris accumulated over the region on the glass article; and
control circuitry configured to:
calibrate a set of parameters associated with the laser beam emitted from the beam optics assembly based on detection of the debris accumulated over the region on the glass article;
control an exposure level of the laser beam on the debris accumulated over the region on the glass article based on calibration of the set of parameters associated with the laser beam, wherein the exposure level is controlled based on pulsing the laser beam at a calibrated rate that limits penetration of the laser beam to a depth that is less than a thickness of the glass article; and
remove the debris accumulated over the region on the glass article by the laser beam, wherein the laser beam is directed on the debris accumulated over the region on the glass article at the exposure level during an exposure period to mitigate a risk of damage to different in-vehicle components beneath the region on the glass article.
2. The cleaning apparatus according to claim 1, wherein the set of parameters comprises at least one of a wavelength associated with the laser beam, a frequency associated with the laser beam, a spot radius formed by the laser beam on the glass article, a pulse duration of the laser beam, a peak power of the laser beam, a number of pulses associated with the laser beam, a focal length of a lens in the beam optics assembly, or an angle of incidence of the laser beam on the debris.
3. The cleaning apparatus according to claim 1, wherein:
the glass article is a vehicle windshield; and
the control circuitry is configured to identify debris or foreign depositions on the vehicle windshield.
4. The cleaning apparatus according to claim 3, wherein the control circuitry is configured to identify debris or foreign depositions on a specific region of the vehicle windshield.
5. The cleaning apparatus according to claim 1, wherein the debris detection circuitry includes an optical sensor.
6. The cleaning apparatus according to claim 5, wherein the optical sensor includes at least one of a built-in camera, a dash camera, a rear-view camera or a surround view camera.
7. The cleaning apparatus according to claim 1, wherein the debris detection circuitry includes a transparent or resistive layer overlaid on the glass article.
8. The cleaning apparatus according to claim 1, wherein the beam optics assembly is configured to steer energy of the emitted laser beam.
9. The cleaning apparatus according to claim 1, wherein the beam optics assembly is configured to beam form energy of the emitted laser beam.
10. The cleaning apparatus according to claim 1, wherein the beam optics assembly is configured to focus beam form energy of the emitted laser beam across a specific region of the glass article.
11. A method for laser cleaning of a glass article installed in a vehicle, comprising:
in control circuitry of a cleaning apparatus that comprises a beam optics assembly configured to emit a laser beam to irradiate a region on the glass article that is installed in the vehicle, and a debris detection circuitry configured to detect debris accumulated on the region of the glass article:
calibrating, by the control circuitry, a set of parameters associated with the laser beam emitted from the beam optics assembly based on detection of the debris accumulated over the region on the glass article;
controlling, by the control circuitry, an exposure level of the laser beam on the debris accumulated over the region on the glass article based on calibration of the set of parameters associated with the laser beam, wherein the exposure level is controlled based on pulsing the laser beam at a calibrated rate that limits penetration of the laser beam to a depth that is less than a thickness of the glass article; and
removing, by the control circuitry, the debris accumulated over the region on the glass article by the laser beam, wherein the laser beam is directed on the debris accumulated over the region on the glass article at the exposure level during an exposure period to mitigate a risk of damage to different in-vehicle components beneath the region on the glass article.
12. The method according to claim 11, wherein the set of parameters comprises at least one of a wavelength associated with the laser beam, a frequency associated with the laser beam, a spot radius formed by the laser beam on the glass article, a pulse duration of the laser beam, a peak power of the laser beam, a number of pulses associated with the laser beam, a focal length of a lens in the beam optics assembly, or an angle of incidence of the laser beam on the debris.
13. The method according to claim 11, wherein:
the glass article is a vehicle windshield; and
the control circuitry identifies debris or foreign depositions on the vehicle windshield.
14. The method according to claim 13, wherein the control circuitry identifies debris or foreign depositions on a specific region of the vehicle windshield.
15. The method according to claim 11, wherein the debris detection circuitry includes an optical sensor.
16. The method according to claim 15, wherein the optical sensor includes at least one of a built-in camera, a dash camera, a rear-view camera or a surround view camera.
17. The method according to claim 11, wherein the debris detection circuitry detects debris using a transparent or resistive layer overlaid on the glass article.
18. The method according to claim 11, wherein the beam optics assembly steers energy of the emitted laser beam.
19. The method according to claim 11, wherein the beam optics assembly beam forms energy of the emitted laser beam.
20. The method according to claim 11, wherein the beam optics assembly focuses beam form energy of the emitted laser beam across a specific region of the glass article.