JPH05318149A - Xy polariscope of laser marker - Google Patents

Abstract

PURPOSE:To provide an XY polariscope of a laser marker which is excellent in the temperature change resistance, the high speed fine controllability, and the polarization scope. CONSTITUTION:In an XY polariscope of the laser marker where the specified whole pattern P are marked on the whole marking area by dividing the whole marking area on a work 9 into a plurality of small areas in X and Y directions, and successively polarizing and irradiating the converged laser beam L incident from the same optical path per the respectively divided marked area, the XY polariscope consists of a first XY table 10 which consists of at least an X table 1x to be driven on X axis 12 and a Y table 1y which is freely slided on Y direction on the surface of a reaction bearing member 14 for the X table 1x, a second XY table 20 which consists of a Y table 2y to be driven on Y axis and an X table 2x which is freely slided in X direction on the surface of a reaction bearing member 24 for the Y table 2y, and a lens 40 which is stored in a base table 30 to be fixed on the Y table 1y and the X table 2x and transmits the converged laser beam.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an XY polarizer for a laser marker, and more particularly to an XY polarizer for a laser marker which is excellent in temperature change resistance, high speed fine movement controllability and polarizability range.

[0002]

2. Description of the Related Art Conventionally, an XY polarizer of this type of laser marker is arranged in front of a work, and a wide pattern can be marked on a wide marking area on the work with high accuracy without moving the work. It is something going on. That is, all the marking areas on the work and all the patterns that should correspond to this,
It is subdivided in the XY directions in advance, and each time the XY polarizer receives the condensed laser beam containing the information of each division pattern from the same optical path, it divides this into each division marking area where each division pattern is to be marked. By irradiating polarized light, the entire pattern is gradually marked with the entire pattern.

That is, conventionally, the following configuration is known for such an XY polarizer. (1) XY polarizer consisting of two galvano-scanner meters orthogonal to each other (2) XY polarizer consisting of a galvano-scanner meter and a lens provided on a table driven orthogonally thereto

[0004]

The quality of the XY polarizer in such a laser marker is determined by its temperature change resistance, high-speed fine movement controllability, and polarizability range.
For example, if the high-speed fine movement controllability is poor, a double mark may occur between the divided marking areas, or a marking omission like a line may occur. Further, for example, if the polarizability range is narrow, it is impossible to engrave over a large area.

From this point of view, the conventional XY polarizer described above is by no means satisfactory as shown below. (1) The XY polarizer composed of two galvano-scanner meters which are orthogonal to each other has a problem that the galvano-scanner meter itself reacts sensitively to the temperature change of the environment and lowers the driving accuracy. The deflectable range of the first galvano-scanner meter can of course be wide, but the larger the deflectable range of the first-place galvano-scanner meter is, the larger the laser beam deflected by the first galvano-scanner meter is. There is an inconvenience that the galvanometer scanner meter located after the light is received and deflected and reflected again becomes huge. That is, when viewed individually, the galvanometer scanner meter has a wide polarizable range, but as a whole, a large deflectable range cannot be taken, and if this deflectable range is forcibly widened, the galvano scanner meter and its There is an inconvenience that the mass of the drive system increases and the controllability of high-speed fine movement becomes poor. (2) As described in (1) above, the XY polarizer including the galvanometer scanner meter and the lens provided on the table that is driven orthogonally to the galvanometer scanner meter increases the mass of the galvanometer scanner meter and its drive system mass. In order to avoid it, the galvano-scanner meter needs to be positioned first, but still, it is not possible to avoid the deterioration of the driving accuracy due to the environmental temperature change of the galvano-scanner meter itself. Moreover, no matter how wide the deflectable range of the galvanometer scanner meter located at the beginning is, this deflectable range is disadvantageously limited by the specifications of the lens located later.

It is an object of the present invention to provide an XY polarizer of a laser marker which is excellent in temperature change resistance, high speed fine movement controllability and polarizability range, focusing on the disadvantages of the prior art.

[0007]

In order to achieve the above object, an XY polarizer of a laser marker according to the present invention is shown in FIG.
Further, referring to FIG. 2, the entire marking area on the work 9 is divided into a plurality of small areas in the XY direction in advance, and the condensed laser light L incident from the same optical path is divided into the respective divided marking areas. In an XY polarizer of a laser marker, which is capable of marking a predetermined overall pattern P on all the marking areas by sequentially polarizing and irradiating, the XY polarizer is driven at least on the X axis 12. X table 1x and the X
A first XY table 10 including a Y table 1y that freely slides in the Y direction on the surface of the reaction force receiving member 14 of the table 1x.
And a second XY table 20 including a Y table 2y driven on the Y axis 22 and an X table 2x that freely slides in the X direction on the surface of the reaction force receiving member 24 of the Y table 2y,
A lens 40 that is housed in a base 30 that is fixed to the Y table 1y and the X table 2x and that transmits the condensed laser light L is used.

[0008]

According to the above construction, whether the first XY table 10 is driven, the second XY table 20 is driven, or both are driven simultaneously, the external resistance during these driving is
The reaction force receiving members 14 and 24 on the other side only have minute resistance, which is advantageous not only for high-speed fine movement controllability but also for converging the condensed laser beam L, which has a basically wide polarizable range. Since only the lens is used, the polarizability range is also improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to FIGS. First, the configuration of a laser marker body to which the present invention can be applied will be described with reference to FIG. The laser marker shown in the figure is a type in which the laser light Lo is raster-scanned in a display pattern on the liquid crystal mask 6 by the first XY polarizers 3X and 3Y, and the transmitted laser light L is polarized and irradiated to the work 9 by the second XY polarizer. Is.

That is, the laser beam Lo from the laser oscillator 1
Is oscillated in the Y direction (up and down in the liquid crystal mask 6) by the galvano scanner meter 3Y via the beam splitter 2, then reduced by the relay lens 4, and in the X direction (left and right in the liquid crystal mask 6) by the polygon mirror 3X. Be done. After that, the laser beam Lo is further focused on the reflecting mirror 7 by the lens 5, while the laser beam Lo is raster-scanned on the divided pattern displayed on the liquid crystal mask 6. The transmitted laser light L from this divided pattern reaches the second XY polarizer via the reflecting mirror 7 and the objective lens 8, and the divided pattern on the liquid crystal mask 6 is printed by the second XY polarizer. The upper divided marking area is polarized. From the above,
All patterns are sequentially engraved on the surface of the work 9.
In the above, starting and stopping of the laser oscillator 1, driving of the first XY polarizers 3X and 3Y, driving and stopping of the second XY polarizer, display switching of each divided pattern on the liquid crystal mask 6, driving of the work feeder, etc. It is synchronously controlled by the controller So.

The structure of the laser marker body to which the present invention is applied is not limited to the above, and for example, the lenses 2, 4, 5,
In the configuration of the laser marker body shown in FIG. 1, the first and the second XY polarizers 3X and 3Y are replaced (that is, raster scanning is abolished), as well as the type in which the presence or absence of 8 or the reflecting mirror 7 and the mounting position are different. Laser oscillator 1 to liquid crystal mask 6
Thick laser light L on the division pattern of
There are various types such as a method of collectively irradiating o and a method of using a mask for mechanically changing and displaying each divided pattern instead of the liquid crystal mask 6. In any case, the laser light L incident on the second XY polarizer is the condensed laser light emitted from the same optical path.

In the construction of the laser marker body, the XY polarizer according to the present invention corresponds to the second XY polarizer, and its first embodiment is shown in FIG. 2 which is an enlarged view of the second XY polarizer in FIG. Reference will be made below.

The XY polarizer of FIG. 2 has a first XY table 1
0, the second XY table 20, the base 30, and the lens 4
It is composed of 0 and.

More specifically, the first XY table 10 is connected to a drive motor 11 and is driven on the X axis 12 in the X direction, and on the surface of the reaction force receiving member 14 of the X table 1x in the Y direction. The second XY table 20 is connected to a drive motor 21 and is driven on a Y-axis 22 in the Y direction, and a reaction force receiving of the Y table 2y. X on the surface of the member 24
It consists of an X table 2x that slides freely in any direction. A base 30 is provided on the Y table 1y and the X table 2x.
Is fixedly mounted, and a lens 40 that transmits the condensed laser light L is stored in the center of the base 30.

In the first embodiment, the base 30 and the lens 40 (this lens 40 may be one, but normally 5
In order to prevent the base 30 from flexing due to the weight of (~ 6 sheets used, which is a considerable weight), and thereby degrading the precision of the fine marking, the other side of the base 30 is provided separately. It is fixed to the free sliding member 51 on the base 50, and the base 30 is supported on both sides.

The second embodiment of FIG. 3 has a structure in which the base 50 and the free sliding member 51 in the first embodiment are omitted. This is suitable when the weight of the base 30 and the lens 40 is small, such as when the number of lenses 40 is reduced.

FIG. 4 shows the third embodiment. The difference from the first and second embodiments is that the Y table 1y, the X table 2x and the base 30 are different in the first and second embodiments. In contrast to the structure in which the fixing is done by detachable attachment with bolts, the structure in the third embodiment is an integrated structure. The reaction force receiving members 14 and 24 and the Y table 1y
And the X table 2x is different from the first and second embodiments in that the reaction force receiving members 14 and 24 sandwich the tables 1y and 2x in the first and second embodiments. On the other hand, in the third embodiment, the tables 1y and 2x are only different in that the reaction force receiving rods 14 and 24 are fitted inside the holes, and there is no difference in the basic operation.

That is, according to the above-described embodiment, whether the first XY table 10 is driven, the second XY table 20 is driven, or both are simultaneously driven, the external resistance at the time of driving these is the other reaction force receiving member. There is only a small resistance of 14, 24, etc., which is advantageous for high-speed fine movement controllability. Further, since the condensed laser beam L is polarized only by the lens whose polarization range is basically wide, the polarization range is also improved. The resistance to temperature change can be greatly reduced as compared with the galvano scanner meter.

[0019]

As described above, according to the XY polarizer of the laser marker of the present invention, whether the first XY table 10 is driven, the second XY table 20 is driven, or both of them are driven simultaneously, these driving operations are performed. The external resistance at
The reaction force receiving members 14 and 24 on the other side only have minute resistance, which is advantageous not only for high-speed fine movement controllability but also for converging the condensed laser beam L, which has a basically wide polarizable range. Since only the lens is used, the polarizability range is also improved. Further, resistance to temperature change is also improved.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a first embodiment of an XY polarizer of a laser marker according to the present invention.

FIG. 2 is a diagram illustrating an XY polarizer according to the first embodiment.

FIG. 3 is a diagram illustrating an XY polarizer according to a second embodiment.

FIG. 4 is a diagram illustrating an XY polarizer according to a third embodiment.

[Explanation of symbols]

 9 work 10 1st XY table 12 X axis 14 reaction force receiving member 1x X table 1y Y table 20 2nd XY table 22 Y axis 24 reaction force receiving member 2x X table 2y Y table 30 base 40 lens L condensed laser light P whole pattern

Claims (1)

[Claims] 1. The entire marking area on the work 9 is divided into a plurality of small areas in the XY directions in advance, and the condensed laser light L incident from the same optical path is sequentially polarized and irradiated for each divided marking area. As a result, in the XY polarizer of the laser marker, which achieves the marking of the predetermined entire pattern P on the entire marking area, the XY polarizer has at least the X-axis 12
A first XY table 10 including an X table 1x that is driven upward and a Y table 1y that freely slides in the Y direction on the surface of the reaction force receiving member 14 of the X table 1x, and a Y that is driven on the Y axis 22. An X table 2x that freely slides in the X direction on the table 2y and the reaction force receiving member 24 surface of the Y table 2y.
A second XY table 20 and a Y table 1
An XY polarizer of a laser marker, characterized in that it is configured by a lens 40 that is stored in a base 30 that is fixedly mounted on y and an X table 2x and that transmits the condensed laser light L.