Calibrating inspection devices

• US 10,557,800 B2
• Filed: 01/02/2018
• Issued: 02/11/2020
• Est. Priority Date: 01/02/2018
• Status: Active Grant

• Current Assignee: Owens-Brockway Glass Container Incorporated (O-I Glass, Inc.)
• Original Assignee: Owens-Brockway Glass Container Incorporated (O-I Glass, Inc.)
• Inventors: Ringlien, James, Anderson, William
• Primary Examiner(s): Decenzo, Shawn
• Assistant Examiner(s): Underwood, Jarreas C
• Application Number:
  US15/860,369
• Publication Number:
  US 20190204239A1
• Time in Patent Office: 770 Days
• Field of Search: 33286, 33502
• CPC Class Codes: G01B 11/25 by projecting a pattern, e.g. one or more lines, moiré fringes on the object G01B11/255 takes precedence ; image analysis for depth or shape recovery G06T7/50
• CPC Class Codes: G01B 11/2504 Calibration devices
• CPC Class Codes: G01B 11/30 for measuring roughness or irregularity of surfaces
• CPC Class Codes: G01B 21/042 Calibration or calibration artifacts G01B3/30, G01B9/02072 take precedence
• CPC Class Codes: G01N 21/9054 Inspection of sealing surface and container finish
• CPC Class Codes: G01N 21/93 Detection standards; Calibrating baseline adjustment, drift correction
• CPC Class Codes: G01N 21/956 Inspecting patterns on the surface of objects contactless testing of electronic circuits G01R31/308; testing currency G07D; manufacturing processes per se of semiconductor devices implementing a measuring step H01L22/10

Abstract

An inspection device calibration method includes mounting a laser-operated calibration device to a calibration fixture including an adjustable target having alignment indicia; illuminating the adjustable target with laser light from the calibration device; adjusting the adjustable target to operatively align the alignment indicia with the laser light; removing the calibration device from the calibration fixture; mounting to the calibration fixture, an inspection device including one or more adjustable features; and operating the optical inspection device, including adjusting the inspection device to operatively align the inspection device with the adjustable target.

Claims

1. An inspection device calibration method, comprising:

mounting a laser-operated calibration device to a calibration fixture including an adjustable target having alignment indicia;

illuminating the adjustable target with laser light from the calibration device;

adjusting the adjustable target to operatively align the alignment indicia with the laser light;

removing the calibration device from the calibration fixture;

mounting to the calibration fixture an inspection device including one or more adjustable features; and

operating the inspection device, including adjusting the inspection device to operatively align the inspection device with the adjustable target.

2. The method of claim 1, further comprising removing the inspection device from the calibration fixture and inspecting containers using the inspection device.

3. The method of claim 1, wherein the alignment indicia includes crosshairs.

4. The method of claim 3, wherein the adjusting step comprises adjusting the adjustable target to operatively align laser lines with the crosshairs.

5. The method of claim 1, wherein the mounting steps include using a common mounting point of the calibration fixture to locate both the calibration device and the inspection device.

6. The method of claim 5, wherein the mounting steps include using one or more additional mounting points along with the common mounting point of the calibration fixture to locate both the calibration device and the inspection device.

7. The method of claim 1, wherein the adjustable target is three-dimensionally adjustable along x-, y-, and z-axes.

8. The method of claim 1, wherein the operating step comprises focusing camera lens of the inspection device on the adjustable target.

9. The method of claim 1, wherein the operating step comprises adjusting a wire edge laser mirror of the inspection device to align a wire edge laser beam on the adjustable target.

10. The method of claim 1, wherein the operating step comprises adjusting a wire edge image mirror of the inspection device to superimpose an image of a wire edge laser at a camera.

11. The method of claim 1, wherein the operating step comprises focusing a wire edge lens of the optical inspection device to sharpen an image at a camera.

12. The method of claim 1, wherein the operating step comprises adjusting a crizzle light emitting diode (LED) of the inspection device to center light from the crizzle LED on the adjustable target.

13. The method of claim 1, wherein adjusting the adjustable target comprises moving the adjustable target along a z-axis closer to or further from the calibration device.

14. The method of claim 13, wherein adjusting the adjustable target comprises inserting one or more shims between a base of the calibration fixture and the adjustable target.

15. The method of claim 13, wherein the adjusting step comprises moving the adjustable target along the z-axis farther from the calibration device when a first x-axis laser beam impinges a target surface of the adjustable target along a positive y-axis of the alignment indicia and a second x-axis laser beam impinges the target surface of the adjustable target along a negative y-axis of the alignment indicia.

16. The method of claim 13, wherein the adjusting step comprises moving the adjustable target along the z-axis nearer to the calibration device when a first x-axis laser beam impinges a target surface of the adjustable target along a negative y-axis of the alignment indicia and a second x-axis laser beam impinges the target surface of the adjustable target along a positive y-axis of the alignment indicia.