US3746868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Correction apparatus for optical reading mechanism
Assignee: Zellweger Uster AG
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Filing: 1972-01-28
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Granted: 1973-07-17
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Expires: 1992-01-28
Abstract
Abstract A correction apparatus for an optical reading mechanism wherein at least two line filters arranged in intersecting planes are disposed between a scanning track and a receiver.
Inventors
- 👤 J Plockl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:26
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/10831; G06K7/10861; G06K7/10871; H; H04; H04N; H04N1/00; H04N1/024; H04N1/028; H04N1/029
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
For use with an optical reading mechanism having a scanning track and a receiver with an inlet opening, a correction apparatus for such optical reading mechanism which comprises at least two line filters arranged in intersecting planes between the scanning track and the receiver, said intersecting planes enclosing an angle with respect to one another which is greater than 90*, said two line filters in said intersecting planes compensating for fluctuations in the intensity of the light delivered to the receiver.
Claim 2
Dependent Claim
81 words
For use with an optical reading mechanism having a scanning track and a receiver with an inlet opening, a correction apparatus for such optical reading mechanism which comprises at least two line filters arranged in intersecting planes between the scanning track and the receiver, said intersecting planes enclosing an angle with respect to one another which is greater than 90*, said two line filters in said intersecting planes compensating for fluctuations in the intensity of the light delivered to the receiver.
Claim 3
Dependent Claim
86 words
For use with an optical reading mechanism having a scanning track and a receiver with an inlet opening, a correction apparatus for such optical reading mechanism which comprises at least two line filters arranged in intersecting planes between the scanning track and the receiver, the axis of greatest light passage of one of the line filters is at least approximately directed towards one end of the scanning track And that of the other line filter at least approximately towards the other end of the scanning track.
Claim 4
Dependent Claim
86 words
For use with an optical reading mechanism having a scanning track and a receiver with an inlet opening, a correction apparatus for such optical reading mechanism which comprises at least two line filters arranged in intersecting planes between the scanning track and the receiver, the axis of greatest light passage of one of the line filters is at least approximately directed towards one end of the scanning track And that of the other line filter at least approximately towards the other end of the scanning track.
Claim 5
Dependent Claim
85 words
For use with an optical reading mechanism having a scanning track and a receiver with an inlet opening, a correction apparatus for such optical reading mechanism which comprises at least two line filters arranged in intersecting planes between the scanning track and the receiver, the axes of greatest light passage of said line filters are disposed in a pair substantially symmetrically with respect to the connection line of the central point of the scanning track with the central point of the opening of the receiver.
Claim 6
Dependent Claim
85 words
For use with an optical reading mechanism having a scanning track and a receiver with an inlet opening, a correction apparatus for such optical reading mechanism which comprises at least two line filters arranged in intersecting planes between the scanning track and the receiver, the axes of greatest light passage of said line filters are disposed in a pair substantially symmetrically with respect to the connection line of the central point of the scanning track with the central point of the opening of the receiver.
Claim 7
Dependent Claim
70 words
For use with an optical reading mechanism having a scanning track and a receiver with an inlet opening, a correction apparatus for such optical reading mechanism which comprises at least two line filters arranged in intersecting planes between the scanning track and the receiver, said line filters are disposed such that the light emanating from each of the line filters falls essentially completely at the inlet opening of the receiver.
Claim 8
Dependent Claim
70 words
For use with an optical reading mechanism having a scanning track and a receiver with an inlet opening, a correction apparatus for such optical reading mechanism which comprises at least two line filters arranged in intersecting planes between the scanning track and the receiver, said line filters are disposed such that the light emanating from each of the line filters falls essentially completely at the inlet opening of the receiver.
Claim 9
Dependent Claim
81 words
For use with an optical reading mechanism having a scanning track and a receiver with an inlet opening, a correction apparatus for such optical reading mechanism which comprises at least two line filters arranged in intersecting planes between the scanning track and the receiver, the axis of greatest light passage of said line filters is located externally of the plane of symmetry taken through the central point of the scanning track and the center of the inlet opening of the receiver.
Claim 10
Dependent Claim
81 words
For use with an optical reading mechanism having a scanning track and a receiver with an inlet opening, a correction apparatus for such optical reading mechanism which comprises at least two line filters arranged in intersecting planes between the scanning track and the receiver, the axis of greatest light passage of said line filters is located externally of the plane of symmetry taken through the central point of the scanning track and the center of the inlet opening of the receiver.
References Cited (Backward Citations)
US3127517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |