CA2190189A1 - Method and Apparatus for Illumination and Imaging of a Surface - Google Patents
Method and Apparatus for Illumination and Imaging of a SurfaceInfo
- Publication number
- CA2190189A1 CA2190189A1 CA2190189A CA2190189A CA2190189A1 CA 2190189 A1 CA2190189 A1 CA 2190189A1 CA 2190189 A CA2190189 A CA 2190189A CA 2190189 A CA2190189 A CA 2190189A CA 2190189 A1 CA2190189 A1 CA 2190189A1
- Authority
- CA
- Canada
- Prior art keywords
- image
- obtaining
- illumination
- polarizing film
- ccd
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Image Input (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
An apparatus for illumination and imaging of a surface includes an apparatus for illuminating the surface, an apparatus for obtaining an image of the illuminated surface and providing an output signal representative of the obtained image, and an apparatus for limiting the exposure time of the image-obtaining apparatus to a selected fast exposure time less than the video frame rate of the image-obtaining apparatus. The image-obtaining apparatus may be a CCD-based camera (40). The CCD-based camera and the illumination apparatus may be mounted in a shroud (20) having an opaque side wall. A first polarizing film (100) may be provided intermediate the illumination apparatus and the surface, and a second polarizing film (102), having a polarization orientation orthogonal to that of the first polarizing film, may be provided intermediate to the surface and the image-obtaining apparatus. Tip switches (130, 132) may be provided to prevent activation of the illumination apparatus and the image obtaining apparatus except when a loser edge of the shroud side wall is in contact with the surface.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/020,295 | 1993-02-19 | ||
US08/020,295 US5399852A (en) | 1993-02-19 | 1993-02-19 | Method and apparatus for illumination and imaging of a surface employing cross polarization |
CA002156153A CA2156153C (en) | 1993-02-19 | 1994-02-18 | Method and apparatus for illumination and imaging of a surface |
PCT/US1994/001803 WO1994019766A2 (en) | 1993-02-19 | 1994-02-18 | Method and apparatus for illumination and imaging of a surface |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002156153A Division CA2156153C (en) | 1993-02-19 | 1994-02-18 | Method and apparatus for illumination and imaging of a surface |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2190189A1 true CA2190189A1 (en) | 1994-09-01 |
CA2190189C CA2190189C (en) | 1999-07-13 |
Family
ID=25678108
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002190189A Expired - Lifetime CA2190189C (en) | 1993-02-19 | 1994-02-18 | Method and apparatus for illumination and imaging of a surface |
CA002190190A Expired - Lifetime CA2190190C (en) | 1993-02-19 | 1994-02-18 | Method and apparatus for illumination and imaging of a surface |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002190190A Expired - Lifetime CA2190190C (en) | 1993-02-19 | 1994-02-18 | Method and apparatus for illumination and imaging of a surface |
Country Status (1)
Country | Link |
---|---|
CA (2) | CA2190189C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9323969B2 (en) | 2008-10-31 | 2016-04-26 | Hand Held Products, Inc. | Indicia reading terminal including frame quality evaluation processing |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7331523B2 (en) | 2001-07-13 | 2008-02-19 | Hand Held Products, Inc. | Adaptive optical image reader |
US7852519B2 (en) | 2007-02-05 | 2010-12-14 | Hand Held Products, Inc. | Dual-tasking decoder for improved symbol reading |
-
1994
- 1994-02-18 CA CA002190189A patent/CA2190189C/en not_active Expired - Lifetime
- 1994-02-18 CA CA002190190A patent/CA2190190C/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9323969B2 (en) | 2008-10-31 | 2016-04-26 | Hand Held Products, Inc. | Indicia reading terminal including frame quality evaluation processing |
US9990520B2 (en) | 2008-10-31 | 2018-06-05 | Hand Held Products, Inc. | Indicia reading terminal including frame quality evaluation processing |
US10296770B2 (en) | 2008-10-31 | 2019-05-21 | Hand Held Products, Inc. | Indicia reading terminal including frame quality evaluation processing |
Also Published As
Publication number | Publication date |
---|---|
CA2190189C (en) | 1999-07-13 |
CA2190190C (en) | 1999-08-10 |
CA2190190A1 (en) | 1994-09-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20140218 |
|
MKEX | Expiry |
Effective date: 20140218 |