Commanded location and calibration verification for high-speed laser motion systems

Patent metadata

Field	Value
Publication number	US-12416543-B2
Application number	US-202318144554-A
Country	US
Kind code	B2
Filing date	May 8, 2023
Priority date	May 9, 2022
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

Systems and methods for analyzing laser beam characteristics in high-speed laser motion systems, wherein the high-speed laser motion systems include a laser for generating the laser beam and a build plane positioned at a predetermined location relative to the laser beam, comprising positioning a plurality of pin-hole sensors within a field of view of the laser, wherein each of the pin-hole sensors is positioned at a predetermined location; registering the predetermined location of each pin-hole sensor with the high-speed laser motion systems; directing the laser beam to the predetermined locations of each pin-hole sensor; receiving a signal from each pin-hole sensor to verify positional accuracy of the laser beam; and repeatedly redirecting the laser beam to the predetermined location of each pin-hole sensor to measure precision repeatability.

First claim

What is claimed:

1. A method for analyzing laser beam characteristics in high-speed laser motion systems, wherein the characteristics include verifying a commanded position of the laser beam and verifying the ability of the laser beam to repeatedly move to the commanded position, wherein the high-speed laser motion systems include a laser for generating the laser beam and a build plane positioned at a predetermined location relative to the laser beam, comprising:
(a) positioning a plurality of pin-hole sensors within a field of view of the laser, wherein each of the pin-hole sensors is positioned at a predetermined location;
(b) registering the predetermined location of each pin-hole sensor with the high-speed laser motion systems;
(c) directing the laser beam to the predetermined locations of each pin-hole sensor;
(d) receiving a signal from each pin-hole sensor to verify positional accuracy of the laser beam;
(e) repeatedly redirecting the laser beam to the predetermined location of each pin-hole sensor to measure precision repeatability;
(f) setting the build plane to a first predetermined height;
(g) subsequent to setting the build plane to the first predetermined height, rastering the laser beam over the predetermined location of each pin-hole sensor and measuring spot size diameter of the laser beam;
(h) moving the build plane to a second predetermined height such that the plurality of pin-hole sensors are further from or closer to the laser beam;
(i) subsequent to moving the build plane to the second predetermined height, rastering the laser beam over the predetermined locations of each pin-hole sensor and measuring the spot size diameter of the laser beam at the second predetermined height; and
(j) comparing the spot size diameter at the first predetermined height to the spot size diameter at the second predetermined height.

2. The method of claim 1 , wherein the laser beam is directed to the predetermined locations of each pin-hole sensor at low laser powers.

3. The method of claim 1 , wherein the laser beam is rastered over the predetermined locations of each pin-hole sensor at high laser powers.

4. The method of claim 1 , further comprising repeatedly redirecting the laser beam to the predetermined location of each pin-hole sensor at the first predetermined height and the second predetermined height to measure precision repeatability.

5. A system for analyzing laser beam characteristics in high-speed laser motion systems, wherein the characteristics include verifying a commanded position of the laser beam and verifying the ability of the laser beam to repeatedly move to the commanded position, wherein the high-speed laser motion systems include a laser for generating the laser beam and a build plane positioned at a predetermined location relative to the laser beam, comprising:
(a) a plurality of pin-hole sensors positioned within a field of view of the laser, wherein each of the pin-hole sensors is positioned at a predetermined location,
wherein the predetermined location of each pin-hole sensor is registered with the high speed laser motion systems,
wherein the laser beam is directed to the predetermined location of each pin-hole sensor,
wherein a signal is received from each pin-hole sensor to verify positional accuracy of the laser beam,
wherein the laser beam is repeatedly redirected to the predetermined location of each pin-hole sensor to measure precision repeatability,
wherein the build plane is set to a first predetermined height, the laser beam is rastered over the predetermined location of each pin-hole sensor, and spot size diameter of the laser beam is measured, and
wherein the build plane is moved to a second predetermined height such that the plurality of pin-hole sensors are further from or closer to the laser beam, the laser beam is rastered over the predetermined location of each pin-hole sensor, the spot size diameter of the laser beam is measured at the second predetermined height, and the spot size diameter at the first predetermined height is compared to the spot size diameter at the second predetermined height.

6. The system of claim 5 , wherein the laser beam is directed to the predetermined locations of each pin-hole sensor at low laser powers.

7. The system of claim 5 , wherein the laser beam is rastered over the predetermined locations of each pin-hole sensor at high laser powers.

8. The system of claim 5 , wherein the laser beam is repeatedly redirected to the predetermined location of each pin-hole sensor at the first predetermined height and the second predetermined height to measure precision repeatability.

9. A system for analyzing laser beam characteristics in high-speed laser motion systems, wherein the characteristics include verifying a commanded position of the laser beam and verifying the ability of the laser beam to repeatedly move to the commanded position, wherein the high-speed laser motion systems include a laser for generating the laser beam and a build plane positioned at a predetermined location relative to the laser beam, comprising:
(a) positioning a portable testing apparatus within a predetermined field of view of the laser, wherein the portable testing apparatus includes:
(i) a plurality of pin-hole sensors, wherein each of the pin-hole sensors is mounted at a predetermined location in the portable testing apparatus;

(b) registering the predetermined location of each pin-hole sensor with the high-speed laser motion systems;
(c) directing the laser beam to the predetermined locations of each pin-hole sensor;
(d) receiving a signal from each pin-hole sensor to verify positional accuracy of the laser beam; and
(e) repeatedly redirecting the laser beam to the predetermined location of each pin-hole sensor to measure precision repeatability,
wherein the build plane is set to a first predetermined height, the laser beam is rastered over the predetermined location of each pin-hole sensor, and spot size diameter of the laser beam is measured, and
wherein the build plane is moved to a second predetermined height such that the plurality of pin-hole sensors are further from or closer to the laser beam, the laser beam is rastered over the predetermined location of each pin-hole sensor, the spot size diameter of the laser beam is measured at the second predetermined height, and the spot size diameter at the first predetermined height is compared to the spot size diameter at the second predetermined height.

10. The system of claim 9 , wherein the laser beam is directed to the predetermined locations of each pin-hole sensor at low laser powers.

11. The system of claim 9 , wherein the laser beam is rastered over the predetermined locations of each pin-hole sensor at high laser powers.

12. The system of claim 9 , wherein the laser beam is repeatedly redirected to the predetermined location of each pin-hole sensor at the first predetermined height and the second predetermined height to measure precision repeatability.

Assignees

• Edison Welding Inst Inc

Inventors

• Hay Jacob C
• Aman Ron
• Ream Stanley L

Classifications

• G01B11/002

  for measuring two or more coordinates · CPC title

• B23K26/082

  Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head · CPC title

• G01J1/0271

  Housings; Attachments or accessories for photometers · CPC title

• G01J1/0425

  using optical fibers · CPC title

• G01J1/4257

  applied to monitoring the characteristics of a beam, e.g. laser beam, headlamp beam (monitoring arrangements for lasers in general H01S3/0014) · CPC title