GB2114792A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Recognising optical code markings
Assignee: Erwin Sick GmbH Optik Elektronik
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Filing: 1983-01-18
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Granted: —
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Expires: 2003-01-18
Abstract
Abstract An apparatus for recognising optical coding marks applied to articles has two photoreceivers (11, 12) arranged one behind the other in the reading direction. The outputs of the photoreceivers (11, 12) are connected to a difference forming stage to compensate for mispositioning of the article. Further photoreceivers (30, 34) detect presence/absence of the article. Mirror 38 separates visible from infra-red. <IMAGE>
Inventors
- 👤 Dr Arthur Walter
- 👤 Jurgen Erdmann
- 👤 Gunter Fetzer
- 👤 Felix Schorlin
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-11-04 07:41
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/10861
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
141 words
Apparatus for recognising optical code markings applied to articles and for their conversion into electronically processable signals, the apparatus comprising an optical illuminating device for the article, an optical receiving device for imaging the code markings onto at least one
photo receiver and an electronic processing circuit
connected to the photoreceiver, wherein relative movement takes place between the apparatus and the articles which results in the code markings
being imaged after each other onto the
photoreceiver, characterised in that, two
photoreceivers (11, 1 2) are arranged one after the
other in the reading direction at such a spacing that the code markings (29) are imaged first on the one photoreceiver (11) and then on the other
photoreceiver (1 2), and in that the outputs of the
photoreceivers (11, 12) are connected to a
difference forming stage (13), optionally via
amplifiers (21,22).
Claim 2
Dependent Claim
141 words
Apparatus for recognising optical code markings applied to articles and for their conversion into electronically processable signals, the apparatus comprising an optical illuminating device for the article, an optical receiving device for imaging the code markings onto at least one
photo receiver and an electronic processing circuit
connected to the photoreceiver, wherein relative movement takes place between the apparatus and the articles which results in the code markings
being imaged after each other onto the
photoreceiver, characterised in that, two
photoreceivers (11, 1 2) are arranged one after the
other in the reading direction at such a spacing that the code markings (29) are imaged first on the one photoreceiver (11) and then on the other
photoreceiver (1 2), and in that the outputs of the
photoreceivers (11, 12) are connected to a
difference forming stage (13), optionally via
amplifiers (21,22).
Claim 3
Dependent Claim
104 words
Apparatus in accordance with claim 1,
characterised in that a comparator (14) is
connected to the difference forming stage, the
comparator reacting when a predetermined value
of the input signal is reached and its output being
applied to the control inputs (15, 16) of two
analog-digital converters (17, 18!, the signal inputs 9,20) of which are respectively
connected to one of the photoreceivers (11, 12 respectively), wherein, in the event that an output
signal appears at the difference forming stage
(13), the comparator (14) initiates the digitising
process in the analog to digital converters (17, 18) via the control inputs (1 5, 1 6).
Claim 4
Dependent Claim
55 words
Apparatus in accordance with claim 2 and
characterised in that the outputs of the analog to
digital conveters (1 7, 18) only allow the resetting
of the comparator via a return line when the
outputs of the two analog to digital converters
(17, 18) have transmitted pulses corresponding to
the width of a code marking.
Claim 5
Dependent Claim
43 words
Apparatus in accordance with one of the
preceding claims and characterised in that a third
photoreceiver (30, 34) recognises the presence of
a code marking carrier (37) in the field of view of
the apparatus and forms a window reading pulse
(32) therefrom.
Claim 6
Dependent Claim
38 words
Apparatus in accordance with claim 4 and
characterised in that the third photoreceiver (30,
34) is connected, if necessary via an amplifier (31,
35), to an analog to digital converter (33) which
transmits the window reading pulse (32).
Claim 7
Dependent Claim
25 words
Apparatus in accordance with claim 4 or
claim 5 and characterised in that the third
photoreceiver (30) receives the infrared
component of the received light.
Claim 8
Dependent Claim
39 words
Apparatus in accordance with claim 4 or
claim 5 and characterised in that the third
photoreceiver (34) is part of a light barrier which
responds to the presence of the code marking
carrier (37) in the field of view.
Claim 9
Dependent Claim
36 words
Apparatus in accordance with claim 6 and 7
and characterised in that two third photoreceivers (30, 34) are present which can be selectively connected to the analog to digital converter (33) by a change-over switch (36).
Claim 10
Dependent Claim
44 words
Apparatus in accordance with claim 6 or claim 8 and characterised in that a colour dividing mirror (38) separates the measurement light for the two first photoreceivers (11, 12) which lies in the visible range from the light which reaches a third photoreceiver (30).
Claim 11
Dependent Claim
42 words
Apparatus in accordance with claim 7 or claim 8 and characterised in that a reflector (39), which forms an autocollimation light barrier with the optical illuminating device (40) and the other third photoreceiver (34), is arranged behind the code marking carrier (37).
Claim 12
Dependent Claim
13 words
Apparatus substantially as herein described and illustrated with reference to the accompanying drawings.
Claim 13
Dependent Claim
13 words
Apparatus substantially as herein described and illustrated with reference to the accompanying drawings.
References Cited (Backward Citations)
No citation records indexed.
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