Hand-held optically readable information set reader with operation over a range of distances

• US 5,969,321 A
• Filed: 06/17/1997
• Issued: 10/19/1999
• Est. Priority Date: 08/08/1986
• Status: Expired due to Fees

• Current Assignee: Intermec IP Corporation (Honeywell International Inc.)
• Original Assignee: Norand Corporation (Baker Hughes Company)
• Inventors: Danielson, Arvin D., Durbin, Dennis A.
• Primary Examiner(s): Hajec, Donald
• Assistant Examiner(s): Lee, Diane I.
• Application Number:
  US08/877,243
• Time in Patent Office: 854 Days
• Field of Search: 235/462.01, 235/472.01, 235/470, 235/454, 235/469, 235/463, 235/462.1, 235/462.22, 235/462.23, 235/462.24, 235/462.25, 235/462.32 , 235/462.42, 235/462.45
• US Class Current: 235/462.01
• CPC Class Codes: G06K 17/0022 arrangements or provisious for transferring data to distant stations, e.g. from a sensing device "transfer between computer elements G06F13/00 "; data-transmission H04L
• CPC Class Codes: G06K 2207/1011 Aiming
• CPC Class Codes: G06K 2207/1013 Multi-focal
• CPC Class Codes: G06K 2207/1018 Source control
• CPC Class Codes: G06K 7/10574 Multiple sources
• CPC Class Codes: G06K 7/10584 Source control
• CPC Class Codes: G06K 7/10613 by rotation, e.g. polygon
• CPC Class Codes: G06K 7/10633 by oscillation
• CPC Class Codes: G06K 7/10722 Photodetector array or CCD scanning
• CPC Class Codes: G06K 7/10732 Light sources
• CPC Class Codes: G06K 7/10811 Focalisation
• CPC Class Codes: G06K 7/10851 Circuits for pulse shaping, amplifying, eliminating noise signals, checking the function of the sensing device basic electronic circuitry H03
• CPC Class Codes: G06K 7/10881 constructional details of hand-held scanners
• CPC Class Codes: G06K 7/109 adaptations to make the hand-held scanner useable as a fixed scanner
• CPC Class Codes: G06K 7/1098 the scanning arrangement having a modular construction
• CPC Class Codes: G06K 7/1417 2D bar codes
• CPC Class Codes: H01Q 3/245 in the focal plane of a focussing device

Abstract

A hand-held optically readable information set reader includes a user supported information set reader for reading information sets at distances from the reader within a certain operative range. The reader includes a plurality of optically readable information set sensors that generate an output signal according to an image of an information set incident thereon. The information set image is captured and sent to a processor, and at least a portion of the output signal generated by information set sensors is stored in memory during a reading operation wherein a first portion of the output signal is assembled with a second portion of the output signal such that the information set is thereby read.

Claims

1. In an optically readable information set reader system, a user supported information set reader operable for reading information sets at distances from said reader within a certain operative range, said reader comprising:

(a) a plurality of optically readable information set sensors for generating an output signal in accordance with an image of an information set incident thereupon;

(b) control and processing means for capturing and for processing the information set image;

(c) a memory operably associated with said control and processing means for storing at least a portion of the output signal generated by said optically readable information set sensor during a reading operation wherein a first portion of the output signal generated by said optically readable information set sensor during a reading operation is assembled with a second portion of the output signal generated by said optically readable information set sensor such that the information set is thereby read.

2. The optically readable information set reader of claim 1, wherein said memory is at least one of DRAM, FLASH, SRAM, SHIFT REGISTER, CAPACITIVE MEMORY, and said sensor.

3. The optically readable information set reader system of claim 1, wherein said image sensor means monitors the reflected light from an information set to be read during a reading operation, and wherein integration is terminated once an optimum sample of the reflected light image has been received.

4. The optically readable information set reader system of claim 1, further comprising reading distance adaption means which includes at least one of label guide indicator means and reading distance sensor means.

5. The optically readable information set reader system of claim 4, wherein said reading distance adaption means includes at least one lens.

6. The optically readable information set reader system of claim 5, wherein said at least one lens focuses the reflected light image of an information set to be read on said image sensor means.

7. The optically readable information set reader system of claim 6, wherein said at least one lens reflects said reflected light image of an information set to be read on said image sensor over a range which exceeds said certain operative range for reading of information sets and focuses said reflected light image of an information set to be read on said image sensor within said operative range.

8. The optically readable information set reader system of claim 7, wherein said reading distance adaption means includes indicator means for indicating to an operator when said system is within said operative range.

9. The optically readable information set reader system of claim 1, wherein said reading distance adaption means includes at least one marker beam directed into the field of view of the reflected light image sensor.

10. The optically readable information set reader system of claim 9, wherein said at least one marker beam is at least two marker beams and said marker beams extend from opposite ends of the information set image sensor.

11. The optically readable information set reader system of claim 1, wherein said at least one lens has through the lens beam optics such that the spots produced by said marker beams delineate the field of view and the desired position of an information set to be read.

12. The optically readable information set reader system of claim 1, further comprising a flashable illuminator.

13. The optically readable information set reader system of claim 12, wherein a capacitor discharge energizes said flashable illuminator.

14. The optically readable information set reader system of claim 13, wherein the capacitor discharge current is interrupted.

15. The optically readable information set reader system of claim 14, wherein said capacitor charge is monitored.

16. The optically readable information set reader system of claim 1, wherein said image sensor means is an adaptive image sensor system capable of enabling a succession of readings of a given information set with reflected light from respective different segments of said information set so as to read information sets residing on curved substrates.

17. The optically readable information set reader system of claim 16, wherein said adaptive image sensor system includes means for simultaneously reading code segments at different focal lengths within a depth of field.

18. The optically readable information set reader system of claim 17, wherein said simultaneous reading means reads at least two code segments within a single integration time.

19. In an optically readable information set reader system, a hand-held information set reader positionable by hand at varying distances from an optically readable information set to be read, comprising:

(a) a plurality of optically readable information set image sensor means for generating output signals in accordance with an information set image incident thereon; and

(b) optical means providing different optical paths for reading information sets at varying distances.

20. In an optically readable information set reader system as defined in claim 19, wherein said plurality of optically readable information set image sensor means is a photosensitive array.

21. In an optically readable information set reader system as defined in claim 20, wherein said photosensitive array is a two-dimensional array.

22. In an optically readable information set reader system as defined in claim 20, wherein said photosensitive array has a pixel size of not less than seven (7) microns.

23. In an optically readable information set reader system, a user supported information set reader positionable by a user at varying distances from an information set to be read and operable in a stationary position relative to an information set positioned at a distance from said reader within a certain operative range, said reader comprising:

(a) an optically readable information set sensor for generating an output signal in accordance with an information set image incident thereon, and a reading distance adapter for automatically adapting the reader to the reading of an information set at varying distances therefrom by causing an image of the information set to be substantially focused at the image sensor, said image sensor including a plurality of portions and said reading distance adapter including a passive optical path generator providing a plurality of selectively usable paths to said plurality of portions of said image sensor of different effective focal lengths; and

(b) path use control means for effecting use of the portion of said image sensor and the corresponding one of said selectively usable paths which provides the focal length most closely approximating the effective optical distance to an information set to be read.

24. The optically readable information set reader system of claim 23, wherein said sensor is a photosensitive array.

25. The optically readable information set reader system of claim 23, wherein said array has a pixel size not less than seven (7) microns.

26. In an optically readable information set reader system, a hand-held information set reader positionable by hand at varying distances from an optically readable information set to be read and operable for reading information sets at distances from said reader within a certain operative range, said reader comprising:

(a) optically readable information set image sensor means for generating an output signal in accordance with an information set image incident thereon;

(b) distance measurement means for automated reading of distances of an information set from the hand-held bar code reader over a certain measurement range which exceeds said certain operative range for reading of information sets;

(c) reading distance adaptation means for automatically adapting the reader to the reading of information sets at varying distances therefrom within the said operative range by causing an image of the information set to be substantially focused at the image sensor means; and

(d) enabling means for enabling an information set reading operation, and control means coupled with said enabling means and said distance measuring means and operative in response to enabling of an information set reading operation by said enabling means and in response to reading by said distance measurement means of distances within said operative range for automatically controlling the reading distance adaptation means during movement of the reader relative to an information set within said operative range to tend to establish and maintain a focused information set image at the image sensor means.

27. The optically readable information set reader system of claim 26, wherein said image sensor means includes at least one photosensitive array.

28. The optically readable information set reader system of claim 27, wherein said at least one photosensitive array is a CCD.

29. The optically readable information set reader system of claim 27, wherein said image sensor means monitors the reflected light from an information set to be read during a reading operation, and wherein integration is terminated once an optimum sample of the reflected light image has been received.

30. The optically readable information set reader system of claim 29, wherein said reading distance adaption means includes at least one lens.

31. The optically readable information set reader system of claim 30, wherein said at least one lens reflects said reflected light image of an information set to be read on said image sensor over a range which exceeds said certain operative range for reading of information sets and focuses said reflected light image of an information set to be read on said image sensor within said operative range.

32. The optically readable information set reader system of claim 26, wherein said reading distance adaption means includes at least one of label guide indicator means and reading distance sensor means.

33. The optically readable information set reader system of claim 32, wherein said at least one lens focuses the reflected light image of an information set to be read on said image sensor means.

34. The optically readable information set reader system of claim 33, wherein said reading distance adaption means includes indicator means for indicating to an operator when said system is within said operative range.

35. The optically readable information set reader system of claim 26, wherein said reading distance adaption means includes at least one marker beam directed into the field of view of the reflected light image sensor.

36. The optically readable information set reader system of claim 35, wherein said at least one marker beam is at least two marker beams and said marker beams extend from opposite ends of the information set image sensor.

37. The optically readable information set reader system of claim 26, wherein said at least one lens has through the lens beam optics such that the spots produced by said marker beams delineate the field of view and the desired position of an information set to be read.

38. The optically readable information set reader system of claim 37, wherein a capacitor discharge energizes said flashable illuminator.

39. The optically readable information set reader system of claim 38, wherein the capacitor discharge current is interrupted.

40. The optically readable information set reader system of claim 39, wherein said capacitor charge is monitored.

41. The optically readable information set reader system of claim 26, further comprising a flashable illuminator.

42. The optically readable information set reader system of claim 26, wherein said image sensor means is an adaptive image sensor system capable of enabling a succession of readings of a given information set with reflected light from respective different segments of said information set so as to read information sets residing on curved substrates.

43. The optically readable information set reader system of claim 42, wherein said adaptive image sensor system includes means for simultaneously reading code segments at different focal lengths within a depth of field.

44. The optically readable information set reader system of claim 43, wherein said simultaneous reading means reads at least two code segments within a single integration time.