Image sensor mounting system

• US 20020008968A1
• Filed: 06/18/2001
• Published: 01/24/2002
• Est. Priority Date: 07/08/1998
• Status: Active Grant

• Current Assignee: Hand Held Products Incorporated (Honeywell International Inc.)
• Original Assignee: Welch Allyn Incorporated
• Inventors: McCall, Melvin D., Hennick, Robert J., Lacey, Michael P., Hinkley, Robert C.
• Granted Patent: US 6,550,679 B2
• Time in Patent Office: Days
• US Class Current: 361/807
• CPC Class Codes: G06K 7/10722 Photodetector array or CCD scanning
• CPC Class Codes: G06K 7/10732 Light sources
• CPC Class Codes: G06K 7/10742 including a diffuser for diffusing the light from the light source to create substantially uniform illumination of the target record carrier
• CPC Class Codes: G06K 7/10881 constructional details of hand-held scanners
• CPC Class Codes: H04N 23/54 Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils

Abstract

According to the invention, a multilayered image sensor is back mounted to a plate, and the plate in turn, is installed in a holding pocket of a device. In that the scheme takes advantage of a high controllability of a mounting plate'"'"'s thickness, the mounting scheme provides a tight control of holding forces with which an image sensor is secured in an imaging device. In that the scheme provides for back mounting of image sensor on a planar surface, the mounting system provides tight control of an imaging assembly'"'"'s pixel plane to fixed point in space distance.

Claims

1. An optical reader comprising:

an imaging system including an imaging axis and an image sensor;

an illuminations system;

a frame carrying at least one component of said imaging system;

a member having at least one substantially planar insulating surface disposed on said frame, wherein said image sensor is back mounted to said planar surface so that a back surface of said image surface is biased against said substantially planar insulating surface.

2. The optical reader of claim 1, wherein said optical reader further comprises a planar circuit board carrying said frame, wherein said planar surface is positioned in a said frame substantially perpendicularly relative to said planar printed circuit board.

3. The optical reader of claim 1, wherein said frame includes a holding pocket, and wherein a said member having a planar surface is disposed in said holding pocket.

4. The optical reader of claim 3, wherein said frame includes a screw hole adapted to receive a screw for holding said member in said holding pocket.

5. The optical reader of claim 1, wherein said frame includes a front end and a back end and, wherein said member having a planar surface is back plate situated toward said back end of said frame.

6. The optical reader of claim 1, wherein said reader includes substantially unfolded imaging axis extending substantially coplanar with a major axis of said frame, wherein said substantially planar surface on which said image sensor is mounted is substantially perpendicular with said imaging axis.

7. The optical reader of claim 1, wherein said at least one substantially planar insulating surface on which said image sensor is biased comprises a plurality of wall sections.

8. The optical reader of claim 1, wherein said image sensor comprises at least one lead frame.

10. The reader of claim 7, wherein said imaging intersects said, substantially planar surface.

11. The reader of claim 7, wherein said imaging axis is substantially unfolded and wherein said at least one planar surface is generally perpendicular to a said imaging axis.

12. The reader of claim 7, wherein said image sensor mounting member is integral with said frame.

13. The optical reader of claim 7, wherein said frame has a forward and a back end, wherein said mounting member defines said rear end.

14. The optical reader of claim 7, wherein said mounting member includes a cutout section for benching said lead frame of said image sensor.

16. The optical reader of claim 13, wherein substantially an entire lead frame of said image sensor extends through said aperture.

18. The optical reader of claim 13, wherein said mounting member includes a planar surface.

19. The optical reader of claim 18, wherein said planar surface includes a plurality of wall sections.

9. An optical reading device comprising:

a frame for holding at least one optical component of said reader;

an imaging axis;

an image sensor mounting member disposed in said frame, said image sensor mounting member having at least one substantially planar surface, said image sensor mounting member and said frame defining an aperture;

an image sensor having at least one lead frame, wherein said image sensor is mounted to said mounting member so that said lead frame extends through said aperture.

15. An optical reader comprising:

a frame for carrying at least one imaging or illumination component of said reader;

an image sensor mounting member disposed on said frame for receiving an image sensor, said image sensor member and said frame defining an aperture;

an image sensor mounted on said image sensor mounting member, wherein said image sensor is biased toward a surface of said image sensor mounting member, and wherein at least one lead of said image sensor extends through said aperture.

20. The optical reader of claim 15, wherein said mounting member includes a cutout section for benching at least one lead of said image sensor.

17. The optical reader 13, wherein said mounting member includes an insulating surface receiving said image sensor.