Split field optics for locating multiple components

• US 5,699,448 A
• Filed: 07/05/1995
• Issued: 12/16/1997
• Est. Priority Date: 07/05/1995
• Status: Expired due to Fees

• Current Assignee: Delaware Capital Formation Incorporated (Dover Corporation)
• Original Assignee: Universal Instruments Corporation (Delta Electronics Incorporated)
• Inventors: Lister, Peter M., Gorenflo, Michael J.
• Primary Examiner(s): Boudreau, Leo
• Assistant Examiner(s): SHALWALA, BIPIN H
• Application Number:
  US08/498,128
• Time in Patent Office: 895 Days
• Field of Search: 382/100, 382/103, 382/106, 382/141, 382/143, 382/144, 382/145, 382/147, 382/148, 382/149, 382/150, 382/151, 382/152, 382/153, 355/1, 356/73.1, 29/834
• US Class Current: 382/151
• CPC Class Codes: G06V 10/10 Image acquisition document image scanning and transmission H04N1/00; control of digital cameras H04N23/60

Abstract

An apparatus and method is provided for capturing component location information through the use of fiber optic conduits. In various embodiments, an image of a component attached to a translatable and rotatable spindle is captured and transmitted along a fiber optic conduit to a camera coupled to an image processing computer. The image processing computer determines component location on the spindle based on the transmitted image and, where necessary, generates component location correction information so that the spindle and attached component can be moved to a determined location. A plurality of fiber optic conduits may be bundled together to provide a single combined image of multiple components attached to multiple spindles which can be captured by a single camera, wherein the image processing computer segregates the images and determines multiple component location correction information.

Claims

1. Apparatus for determining component location information, comprising;

a head comprising a plurality of component spindles each capable of attaching a component;

a plurality of fiber optic conduits each having a first end disposed to receive a corresponding image from one of the attached components and a second end having a face for transmitting the corresponding image, wherein all of the second ends are bundled together to produce a single combined image of the corresponding individual images;

a camera positioned to capture the single combined image from the bundled fiber optic conduits;

image processing means, coupled to the camera, for storing the captured single combined image, segregating each component from the combined image, determining a location of each component therefrom, and establishing a location deviation of each component by comparing the determined location of each segregated component to a desired location for each component; and

means for generating a location correction signal for each component based on the location deviation of each component.

2. The apparatus of claim 1, further comprising illumination means, encased around each of the plurality of fiber optic conduits, for illuminating each corresponding component.

3. The apparatus of claim 1, wherein the first end of each fiber optic conduit is disposed below one of the attached components in such a manner as to receive the corresponding image from the underside of the one attached component.

4. The apparatus of claim 1, further comprising prism means, movable from a first position away from the components to a second position under the components, for reflecting each corresponding image to a corresponding one of the fiber optic conduits.

5. The apparatus of claim 1, wherein each of the plurality of fiber optic conduits comprises a rectangular bundle of fibers a cross section thereof having an aspect ratio of approximately 4:

3.

11. The apparatus of claim 1, wherein the location correction signal comprises a translational correction and a rotational correction.

12. The apparatus of claim 1, wherein each of the fiber optic conduits comprises a plurality of fibers arranged in a rectangular bundle.

13. The apparatus of claim 1, further comprising a plurality of movable prisms each movable relative to one of the component spindles, wherein each prism when moved beneath one of the component spindles reflects an image of a corresponding component towards one of the first ends of the fiber optic conduits.

14. The apparatus of claim 1, wherein each of the plurality of fiber optic conduits comprises a plurality of glass fibers which accurately depict the shape and orientation of one of the attached components.

6. A method of controlling component location in a component assembly device, comprising the steps of:

(a) attaching a plurality of components on a corresponding plurality of component spindles;

(b) receiving a plurality of images each corresponding to one of the plurality of components;

(c) combining the plurality of images into a single combined image;

(d) capturing the single combined image in a camera;

(e) recording the image captured in step (d) in a computer; and

(f) determining, based on the recorded image in the computer, location correction amounts for the plurality of components by separating each component from the recorded image, determining a location of each component therefrom, and establishing a location deviation of each component by comparing the determined location of each segregated component to a desired location for each component.

7. The method of claim 6, wherein step (b) comprises the step of moving a plurality of prisms under the plurality of components, each prism arranged to project an image from one of the plurality of components.

8. The method of claim 6, wherein step (b) comprises the step of moving the plurality of components over a plurality of fiber optic conduits each for capturing one of the images.

9. The method of claim 8, further comprising the step of illuminating the plurality of components using a plurality of light emitters each encased around a corresponding one of the plurality of fiber optic conduits.

10. A medium comprising a software program for performing step (f) of the method of claim 6.

15. The method of claim 6, wherein step (f) comprises the step of determining a translational correction amount and a rotational correction amount.

16. The method of claim 15, further comprising the step of:

(g) using the translational correction amount and the rotational correction amount to adjust each of the plurality of component spindles.

17. Apparatus for placing components, comprising:

a plurality of component spindles each capable of attaching a component;

a plurality of fiber optic conduits each having a first end disposed to receive a corresponding image from one of the attached components and a second end having a face for transmitting the corresponding image, wherein all of the second ends are bundled together to produce a single combined image of the corresponding individual images, and wherein each of the fiber optic conduits comprises a plurality of glass optical fibers arranged in a rectangular bundle;

a plurality of movable reflectors arranged between the plurality of component spindles and the plurality of fiber optic conduits, the movable reflectors being movable between a first position away from the plurality of component spindles to a second position beneath the plurality of component spindles and towards the plurality of fiber conduits;

a plurality of lenses each arranged between a corresponding one of the plurality of movable reflectors and a corresponding one of the plurality of fiber conduits to direct light from the corresponding reflector to the corresponding fiber conduit;

a camera positioned to capture the single combined image from the bundled fiber optic conduits; and

a computer, coupled to the camera, which receives the single combined image, segregates each component from the combined image, determines coordinates of each component in a component space, and generates location correction signals for each of the plurality of component spindles.

18. The apparatus of claim 17, further comprising an illumination source disposed around the periphery of each of the first ends which, when illuminated, causes light to be reflected off each component and into the first ends of the fiber conduits.

19. The apparatus of claim 17, further comprising a plurality of strobe lights which are fired in sequence to illuminate each of the plurality of components.