WO2002056089A2 - Dispositif de transmission d'un rayon de lumiere, en particulier pour le soudage/desoudage de composants electroniques - Google Patents
Dispositif de transmission d'un rayon de lumiere, en particulier pour le soudage/desoudage de composants electroniques Download PDFInfo
- Publication number
- WO2002056089A2 WO2002056089A2 PCT/FR2002/000056 FR0200056W WO02056089A2 WO 2002056089 A2 WO2002056089 A2 WO 2002056089A2 FR 0200056 W FR0200056 W FR 0200056W WO 02056089 A2 WO02056089 A2 WO 02056089A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mirror
- light
- mirrors
- ray
- coming
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/113—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using oscillating or rotating mirrors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/105—Scanning systems with one or more pivoting mirrors or galvano-mirrors
Definitions
- the present invention relates to a device for transmitting a ray of light, in particular a heating ray for soldering / desoldering electronic components on plates.
- a device which makes it possible to send a ray of heating light to zones situated on the periphery of electronic components so as to carry out operations of soldering / desoldering of these components on printed circuit boards.
- Such devices use two galvanometers which make it possible to deflect the light ray so as to scan the areas to be heated from a point of rotation.
- the implementation of such devices poses problems as to the placement and maintenance of the components. In the case where the components are relatively large, the light ray cannot reach certain parts of the welding / desoldering zones due to the presence of shadow zones.
- the present invention aims to provide a device for transmitting a light ray to areas of a surface, in particular areas extending along the sides of a polygon, which in particular solve the difficulties mentioned above. above.
- the device for transmitting a ray of light to areas of a surface, in particular areas extending along the sides of a polygon comprises, according to the invention, a first mirror placed on the path of a ray of light, coming from a light source, directed perpendicular to said surface and deflecting this ray parallel to this surface; means for rotating said first mirror along an axis perpendicular to said surface so that the ray of light from this second mirror performs a rotary scan; second mirrors distributed around and at a distance from said first mirror, on the path of the rotating ray of light from from this first mirror, and selectively deflecting this radius towards said surface; and means for pivoting said second mirrors along an axis parallel to said surface; so that by actuating the pivoting means of said first mirror, the ray of light coming from the light source is deflected by this first mirror from which comes a beam which selectively scans said second mirrors and by actuating the means of pivoting of said second mirrors, the beam from said first mirror is deflect
- the device preferably comprises a light source emitting a ray of light parallel to said surface and a third mirror placed on the path of the ray of light coming from said light source and deflecting this ray perpendicular to said surface towards said first mirror.
- said second mirrors are preferably placed in such a way that the direction of the light ray directed towards said first mirror and the direction of the light rays coming from said second mirrors converge on the side of said surface.
- said second mirrors are preferably placed so that the light rays which emanate therefrom respectively scan said areas by describing light beams which form obtuse angles with said surface.
- the light rays emanating from said second mirrors are preferably directed towards zones to be heated situated at the periphery of an electronic component for the purpose of welding / desoldering of electrical connections.
- the first mirror is placed above said third mirror.
- the first mirror is placed below said third mirror.
- the device preferably comprises support and / or suction means placed above said surface, in the space extending between said light beams from said second mirrors.
- said means for pivoting said first mirror preferably have at least a first speed of rotation associated with its angular displacements corresponding to the scans of said zones and a second speed of rotation, greater than the first speed, associated with its movements angular allowing the passage from one zone to another.
- the device comprises four second mirrors regularly distributed on the periphery of said first mirror and opposite two by two.
- FIG. 1 shows a schematic perspective view of a device for transmitting a light beam according to the present invention
- FIG. 2 shows a section through a median vertical plane of the transmission device of Figure 1;
- FIG. 3 shows a perspective view of the construction of the transmission device of Figure 1;
- - And Figure 4 shows a schematic perspective view of an alternative embodiment of the above transmission device.
- the device 1 for transmitting a light ray shown in FIGS. 1 to 3 is more particularly intended for heating zones 2 of welding / desoldering extending around an electronic component 3 installed on a printed circuit board 4, placed horizontally and carried by a support 5, these welding / desoldering zones 2 extending laterally to the component 3, in the corners formed between its side walls and the upper surface of the printed circuit 4.
- the transmission device 1 Above and at a distance from component 3, the transmission device 1 comprises a horizontal support plate 6 above which is fixed a mirror J arranged vertically from component 3. This mirror 7 is inclined at 45 and is placed on the path of a horizontal light ray 8 generated by a light source 9 placed at a distance so as to deflect it vertically and upwards.
- the transmission device 1 comprises a mirror 10 placed above and at a distance from the fixed mirror 7, on the way to the vertical light ray 11 coming from the mirror 7. This mirror is inclined at 45 so as to deviate horizontally this light ray 11
- the mirror 7 is carried by the end of the vertical shaft 12 of a motor 13 whose vertical axis coincides with the light ray 11, so that when the mirror 10 is rotated, the light ray 14 which results therefrom rotates by scanning a horizontal plane.
- the transmission device 1 further comprises four mirrors 15 which are distributed at the periphery and at a distance from the rotating mirror 10, on the path of the light ray 14 coming from the latter. These mirrors 15 are carried by the shafts 16 of four electric motors 17 and extend parallel to these shafts. The axes of the motors 16 are placed along the sides of an imaginary square 18 extending approximately in the horizontal plane of the light beam described by the rotating beam 14 and the mirrors 15 are placed substantially in the middle of the sides of the square 18.
- the mirrors 15 are also placed so that the impact lines 19 of the turning radius 14 extend widely outside the vertical of the surface of the electronic component 3, the latter being installed so that its sides are substantially parallel to the sides of square 18.
- the light beam 20 which results therefrom can be oriented as desired.
- the support plate 6 has through passages 21 such that, more particularly, the light rays 20 coming from the mirrors 15 can be directed selectively towards the zones 2 surrounding the component 3 by passing through the passages 21.
- the motor 13 carrying the rotary mirror 10 and the motors 17 carrying the mirrors 15, four beams 22 of light are selectively generated respectively scanning the zones 2 to be heated located laterally to the component 3.
- the inclined light rays 20, describing the beams 22 coming from these mirrors, and the vertical direction of the light ray 11, which passes through the component 3, converge downwards so that these bundles 22 form an obtuse angle with the surface covering the zones 2 to be heated, so that they converge towards and can reach the corners between the side walls of the component 3 and the surface of the printed circuit 4.
- the beams 22 from the mirrors 15 determine a volume converging downwards, in particular a pyramid with bands
- control program is adapted to the dimensions of the component 2 and to the configurations of the zones 2 to be heated.
- the central part of the support plate 6 carries, below, a vertical pipette 23 capable of being actuated so as to come to bear on the component 3 in order to hold it in place and in order, if necessary, to extract this component .
- the 13 can provide two widely differing speeds of rotation of the mirror 10 to ensure two speeds of angular displacement of the rotating beam 14, namely a first speed slowed down when the beam 14 which results therefrom is deflected towards the mirrors 15 towards a zone 2 so that the beams 22 scan the zones 2 at reduced speed and an accelerated speed when the light ray 14 which results therefrom passes from one mirror 15 to another.
- the transmission device 24 shown differs from the device 1 described with reference to Figures 1 to 3 only by the fact that the fixed mirror 7 and the rotating mirror 10 are reversed, the mirror rotary 10 and its motor 13 being carried by the support plate 6 and the fixed mirror 7 being placed above. Apart from this difference in arrangement, the transmission device 24 of FIG. 4 operates in the same way as that described with reference to FIGS. 1 to 3.
- the light source 9 emits a heating light ray.
- Other sources could also be provided, in particular a source of visible rays or a pyrometric source for measuring the temperature of zones 2.
- the devices described can be used to expose a ray of light and to sweep through this ray areas or surfaces of any shape.
- the present invention is not limited to the examples described above. Many variant embodiments are possible without departing from the scope defined by the appended claims,
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL15160102A IL151601A0 (en) | 2001-01-09 | 2002-01-09 | Means for transmitting a light beam, in particular for soldering/de-soldering of electronic components |
AU2002228146A AU2002228146A1 (en) | 2001-01-09 | 2002-01-09 | Means for transmitting a light beam, in particular for soldering/de-soldering of electronic components |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0100230A FR2819316B1 (fr) | 2001-01-09 | 2001-01-09 | Dispositif de transmission d'un rayon de lumiere, en particulier pour le soudage/desoudage de composants electroniques |
FR01/00230 | 2001-01-09 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002056089A2 true WO2002056089A2 (fr) | 2002-07-18 |
WO2002056089A3 WO2002056089A3 (fr) | 2003-03-13 |
Family
ID=8858630
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2002/000056 WO2002056089A2 (fr) | 2001-01-09 | 2002-01-09 | Dispositif de transmission d'un rayon de lumiere, en particulier pour le soudage/desoudage de composants electroniques |
Country Status (4)
Country | Link |
---|---|
AU (1) | AU2002228146A1 (fr) |
FR (1) | FR2819316B1 (fr) |
IL (1) | IL151601A0 (fr) |
WO (1) | WO2002056089A2 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1710995A1 (fr) * | 2005-04-01 | 2006-10-11 | Yuping Yang | Scanner rapide avec miroir rotatif et système de traitement d'image |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4409469A (en) * | 1980-01-21 | 1983-10-11 | Sharp Kabushiki Kaisha | Optical bar code reader |
US4794237A (en) * | 1986-11-10 | 1988-12-27 | Ncr Corporation | Multidirectional holographic scanner |
EP0323026A2 (fr) * | 1987-12-28 | 1989-07-05 | Symbol Technologies, Inc. | Dispositif de balayage optique multidirectionnel |
US5173796A (en) * | 1991-05-20 | 1992-12-22 | Palm Steven G | Three dimensional scanning system |
US5237444A (en) * | 1992-06-26 | 1993-08-17 | General Scanning, Inc. | Optical scanning system |
US5239404A (en) * | 1992-09-04 | 1993-08-24 | Litton Systems, Inc. | Large angle reflective scanning system and method |
GB2329724A (en) * | 1997-09-24 | 1999-03-31 | Samsung Electronics Co Ltd | A view selecting apparatus for an X-ray inspection system |
-
2001
- 2001-01-09 FR FR0100230A patent/FR2819316B1/fr not_active Expired - Fee Related
-
2002
- 2002-01-09 IL IL15160102A patent/IL151601A0/xx unknown
- 2002-01-09 WO PCT/FR2002/000056 patent/WO2002056089A2/fr not_active Application Discontinuation
- 2002-01-09 AU AU2002228146A patent/AU2002228146A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4409469A (en) * | 1980-01-21 | 1983-10-11 | Sharp Kabushiki Kaisha | Optical bar code reader |
US4794237A (en) * | 1986-11-10 | 1988-12-27 | Ncr Corporation | Multidirectional holographic scanner |
EP0323026A2 (fr) * | 1987-12-28 | 1989-07-05 | Symbol Technologies, Inc. | Dispositif de balayage optique multidirectionnel |
US5173796A (en) * | 1991-05-20 | 1992-12-22 | Palm Steven G | Three dimensional scanning system |
US5237444A (en) * | 1992-06-26 | 1993-08-17 | General Scanning, Inc. | Optical scanning system |
US5239404A (en) * | 1992-09-04 | 1993-08-24 | Litton Systems, Inc. | Large angle reflective scanning system and method |
GB2329724A (en) * | 1997-09-24 | 1999-03-31 | Samsung Electronics Co Ltd | A view selecting apparatus for an X-ray inspection system |
Also Published As
Publication number | Publication date |
---|---|
FR2819316B1 (fr) | 2003-09-12 |
WO2002056089A3 (fr) | 2003-03-13 |
FR2819316A1 (fr) | 2002-07-12 |
AU2002228146A1 (en) | 2002-07-24 |
IL151601A0 (en) | 2003-04-10 |
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