EP0157431A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Procedure to measure the dimensions of a body in movement in a three-dimensional field, and an optoelectronic device to carry out such procedure
Assignee: CEDA SpA
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Filing: 1985-01-25
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Granted: —
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Expires: 2005-01-25
Abstract
Abstract This invention concerns a procedure to measure the dimensions of a body (2) in movement, the procedure being performed by projection of an image of such body (2) onto a linear sensor (9) and by selection of rays parallel to an optical axis (10) by means of a telecentric filter (6), the rays being made parallel downstream of the telecentric filter (6) for projection onto the sensor (9). The invention concerns also an optoelectronic device which carries out such procedure and comprises a front lens (5), a telecentric filter (6) consisting of a stop, and a linear sensor (9), the device including also a rear lens (7) positioned downstream of the stop (6) and having a focus coinciding with the aperture of the stop (6).
Inventors
- 👤 Ferruccio Della Vedova
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 22:00
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/08; G01B11/10; G01B11/105; G01B11/02; G01B11/024
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
103 words
1 - Procedure to measure the dimensions of a body (2) in movement in a three-dimensional field (3), in which procedure the measurement is performed by projection of an image of such body (2) onto a sensor (9) with photosensitive elements arranged in line and rays substantially parallel to an optical axis (10) substantially at a right angle to the direction of movement of the body (2) to be measured are selected by a telecentric filter (6), the procedure being characterized in that the luminous rays downstream of such telecentric filter (6) are made parallel (7) for their projection onto the sensor (9).
Claim 2
Dependent Claim
103 words
1 - Procedure to measure the dimensions of a body (2) in movement in a three-dimensional field (3), in which procedure the measurement is performed by projection of an image of such body (2) onto a sensor (9) with photosensitive elements arranged in line and rays substantially parallel to an optical axis (10) substantially at a right angle to the direction of movement of the body (2) to be measured are selected by a telecentric filter (6), the procedure being characterized in that the luminous rays downstream of such telecentric filter (6) are made parallel (7) for their projection onto the sensor (9).
Claim 3
Dependent Claim
65 words
2 - Procedure to measure the dimensions of a body (2) in movement in a three-dimensional field (3) as claimed in Claim 1, . in which the information relating to the illumination is ac- . quired in parallel by the photosensitive elements of the sensor (9), the reading of the values relative to the individual photosensitive elements being performed in series successively to such acquisition.
Claim 4
Dependent Claim
36 words
3 - Procedure to measure the dimensions of a body (2) in movement in a three-dimensional field (3) as claimed in Claim 1 or 2, in which the undesired frequencies of radiation are filten- ed (8).
Claim 5
Dependent Claim
43 words
4 - Procedure to measure the dimensions of a body (2) in movement in a three-dimensional field (3) as claimed in any claim hereinbefore, in which the analogue output signal (11) of the. sensor (9) is converted into a logic signal (14) (Fig.2).
Claim 6
Dependent Claim
86 words
5 - Optoelectronic device to carry out the procedure according to any of the claims hereinbefore, such device comprising a - front lens (5), a telecentric filter (6) consisting of a stop. positioned so as to coincide with the focus of the front lens. (5), and a sensor (9) with photosensitive elements arranged in line, the device being characterized in that it comprises a rear lens (7) positioned downstream of the stop (6) and having its front focus coinciding with the aperture of the stop (6).
Claim 7
Dependent Claim
27 words
6 - Optoelectronic device as claimed in Claim 5, in which the front lens (5) and rear lens (7) are positioned on the same optical axis (10).
Claim 8
Dependent Claim
19 words
7 - Optoelectronic device as claimed in Claim 5 or 6, which . comprises a preferred-frequency optical filter (8).
Claim 9
Dependent Claim
33 words
8 - Optoelectronic device as claimed in any of Claims 5 to 7 inclusive, which comprises governing means that control a parallel acquisition of data by the photosensitive elements of. the sensor (9).
Claim 10
Dependent Claim
35 words
9 - Optoelectronic device as claimed in any of Claims 5 to 8 inclusive, in which the sensor (9) is of a type which can be . at least likened to a CCD sensor. A
References Cited (Backward Citations)
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