JP2008058295A - Laser line generator, laser module, and laser marking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an integrated optical component for laser light source, used in laser marking and the like, and also to provide laser module and a laser marking device each having the component incorporated. <P>SOLUTION: Laser line generators 10-1 to 10-4 each have an entrance plane 3, which makes the captured laser beam turn into a condensed beam or a parallel beam, and a wedge-shaped exiting plane 2 which irradiates the incorporated laser beam in a straight form, and front end 1 of the wedge-shaped exiting plane is formed into a chamfered shape and is molded-in with glass or resin. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an optical component for a laser light source used in a laser marking machine or the like, a laser module incorporating the optical component, and a laser marking apparatus.

  A laser marking device is used for setting a reference line for positioning required for construction, construction, and the like. FIG. 6 is a component alignment diagram showing optical axis alignment of a laser line generating optical component used in a conventional laser marking device. In FIG. 6, a laser 15, a condensing or collimation lens 62, and a rod lens 61 are aligned on the same optical axis and incorporated in a housing (not shown), and function as a single laser line generating optical component. Formed to do.

  The alignment is performed such that the laser 15 emits light, and the condensing or collimation lens 62 obtains a predetermined laser beam shape at a predetermined position. Is set. Next, the rod lens 61 is set at a position where a predetermined laser beam shape is obtained. Since the shape of the laser beam tends to be elliptical, it is slightly rotated left and right so that the central axis of the rod lens 61 is orthogonal to the major axis of the ellipse, and fixed at a position where a predetermined irradiation line is obtained.

Thus, since the assembly of the three parts is divided and fixed in two stages, automation is difficult, time is required for adjustment, and it is difficult to reduce the assembly cost due to variations in yield due to manual work. Patent Document 1 describes a mechanism for automatically correcting the vertical and horizontal line light emission postures of a laser marking device having a laser light source, a collimating lens, and a rod lens.
JP 2003-329454 A

  The present invention has been made to solve such problems, and an object of the present invention is to provide an integrated optical component for a laser light source used in a laser marking machine, a laser module incorporating the same, and a laser marking. It is to provide a dispensing device.

  The laser line generator of the present invention has an incident surface for condensing or paralleling the captured laser beam, and a wedge-shaped exit surface for irradiating the captured laser beam in a straight line. The tip has a circular chamfered shape and is molded by glass or resin.

  The laser line generator of the present invention is characterized in that an incident part having an incident surface and an emitting part having an exit surface are molded by glass or resin and are bonded together to be integrated.

  The laser module of the present invention is characterized in that a laser line generator and a laser are incorporated in a housing and irradiates laser light in a straight line.

  The laser module according to the present invention is characterized in that a laser line generator is formed directly on a laser case and irradiates a laser beam in a straight line.

  The laser module according to the present invention is characterized in that the laser line generator is formed by directly replacing the laser window glass and irradiating the laser beam in a straight line.

  The laser module according to the present invention is characterized in that the exit surface of the laser module has an exit surface that is a spot-like irradiation by condensed light or parallel light, and the laser beam is emitted in a spot shape.

  The laser marking device of the present invention has a laser module that irradiates laser light in a straight line, and an emission surface that has an emission surface that becomes a spot-like irradiation by condensed light or parallel light, and irradiates the laser beam in a spot shape. The laser module, the irradiation switching means, and the power supply means are incorporated in the casing, and linear irradiation and spot irradiation are performed simultaneously or individually by the irradiation switching means.

  According to the present invention, the integrated laser line generator requires only one stage of assembly, so that automation is facilitated, and the assembly cost can be reduced because adjustment time is shortened and yield is improved. Further, by integrating the two optical components, the number of components can be reduced, and the component cost can be reduced. Furthermore, depending on the application, it is possible to expand the application of the inking device with a marking module equipped with the required number of laser modules that irradiate laser light in a straight line and laser modules that radiate in a spot shape. It becomes.

  Embodiments of a laser line generator, a laser module incorporating the laser line generator, and a laser marking device according to the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the shape of a laser line generator according to the present invention. In FIG. 1a, the entire laser line generator 10-1 has a cylindrical shape, and the incident surface 3 has a conventional shape for condensing or collimating laser light with respect to the optical axis. On the other hand, the emission surface 2 has a wedge shape in order to irradiate laser light in a straight line, and the wedge-shaped tip 1 has a circular chamfered shape.

  This laser line generator 10-1 is manufactured by molding by injecting glass or resin into a mold. The laser line generator 10-2 in FIG. 1b is formed by separately molding the incident portion 5 on the incident surface 3 side and the emitting portion 4 on the exit surface 2 side shown in FIG. It is an integrated one. The bonding surface of the bonding portion 6 is not necessarily circular, but may be any shape such as an ellipse.

  A laser line generator 10-3 shown in FIG. 1c is formed by narrowing the incident surface 3 side at an arbitrary position of a cylindrical portion connecting the incident surface 3 and the exit surface 2 of the laser line generator 10-1 of FIG. 1a. It was produced. Further, the laser line generator 10-4 shown in FIG. 1d is formed by narrowing the emission surface 2 side at an arbitrary position of the cylindrical portion connecting the incidence surface 3 and the emission surface 2 of the laser line generator 10-1 of FIG. It was produced.

  FIG. 7 is a diagram showing the principle of linear irradiation according to the present invention. The emission surface 2 has a wedge-shaped surface 70 and a circular chamfered surface 80. Incident light L-1 incident on the wedge-shaped surface 70 is refracted according to Snell's law, and is irradiated on the irradiation surface 90 as outgoing light L-4. Similarly, the incident light L-2 incident on the wedge-shaped surface 70 adjacent to the circular chamfered surface 80 and the incident light L-3 incident on the circular chamfered surface 80 are emitted light L-5 and L, respectively. The irradiation surface 90 is irradiated as −6. In this case, the irradiation surface 90 is irradiated with the outgoing light L-5 of the incident light L-2 (the lower side is not shown) that has entered the wedge-shaped surface 70 adjacent to the circular chamfered surface 80 in a vertically symmetrical manner. Determine the length of both ends of the linear irradiation light.

  FIG. 2 is a component alignment diagram showing optical axis alignment of the first laser module of the present invention. In FIG. 2, the first laser module includes a laser line generator 10-1 or 10-2 of FIG. 1 and a laser 15 that are aligned on the same optical axis and incorporated in a housing (not shown). It is formed so as to function as a laser module which is a laser line generating optical component.

  The laser chip, which is a light emitter, is mounted on a base 8 (see FIG. 4), and a cylindrical portion 7 having a window glass serving as a case for the laser chip is bonded to the base 8. The emitted light of the laser is emitted from the window glass. This laser light is received by the incident surface 3 of the laser line generator 10-1 or 10-2, and is emitted from a part 1 of the cylinder in order to irradiate linearly. As described above, the laser line generators 10-1 and 10-2 have a structure in which the condensing or collimation lens 62 and the rod lens 61 in FIG. 6 are integrated. It can be obtained with one laser line generator.

  Alignment is performed at a position where a predetermined irradiation line is obtained by causing the laser 15 to emit light, adjusting the position and rotation angle of either the laser 15 or the laser line generator 10-1 or 10-2, or both. To do. Thus, since the assembly of the two parts is performed and fixed in one stage, automation is possible, and the assembly cost can be reduced due to the reduction in adjustment time and the variation in yield.

  FIG. 3 is a laser module diagram showing the mounting of the second laser module of the present invention. In FIG. 3, the second laser module is formed by mounting either the laser line generator 10-1 or 10-2 shown in FIGS. 1a and 1b directly on the cylindrical portion 7 of the laser 15 shown in FIG. Is done. The alignment is performed in the same manner as in FIG. 2, but in this case, only the rotation angle needs to be adjusted. This further facilitates the assembly process.

  FIG. 4 is a laser module diagram showing the mounting of the third laser module of the present invention. 4a, the laser line generator 10-3 shown in FIG. 1c is mounted in place of the window glass of the cylindrical portion 7 of the laser 15 shown in FIG. The laser chip 9 is fused or bonded on the base 8. 4b, the laser line generator 10-4 shown in FIG. 1d is mounted in place of the window glass of the cylindrical portion 7 of the laser 15 shown in FIG. The alignment is performed in the same manner as in FIG. As a result, the module can be miniaturized in addition to the ease of the assembly process.

  In FIG. 4c, in the laser line generator 11, the exit surface of the laser line generator 10-4 shown in FIG. 1d is an exit surface that becomes a conventional spot-shaped irradiation with condensed light or parallel light. As a result, it is possible to obtain the same-shaped linear irradiation and spot-shaped irradiation laser modules in the same process, and it is possible to reduce the respective component costs.

  FIG. 5 is a block diagram showing the configuration of the laser marking device of the present invention. In FIG. 5, a laser marking device 50 includes a laser module 51 that irradiates laser light in a straight line, a laser module 52 that irradiates in a spot shape, an irradiation switching unit 53, and a power source unit 54. It is built in. The irradiation switching means 53 connects the power supply means 54 with the laser module 51 and the laser module 52 simultaneously or individually.

  Thereby, since linear and spot-shaped irradiation light can be obtained simultaneously or individually, the positioning reference points and reference lines required for construction or various constructions can be freely set. Further, since the laser modules 51 and 52 can be incorporated as many as necessary according to the application, the application of the laser marking device 50 can be expanded.

  As described above, according to the present invention, an integrated laser line generator requires only one stage of assembly, facilitating automation, and reducing assembly time and shortening adjustment time and improving yield. Become. Further, by integrating the two optical components, the number of components can be reduced, and the component cost can be reduced. In addition, depending on the application, it is possible to expand the application of the inking device with the inking device equipped with the required number of laser modules that irradiate laser light in a straight line and the laser modules that irradiate in a spot shape. Become.

The block diagram which shows the shape of the laser line generator by this invention. FIG. 3 is a component alignment diagram showing optical axis alignment of the first laser module of the present invention. The laser module figure which shows mounting of the 2nd laser module of this invention. The laser module figure which shows mounting of the 3rd laser module of this invention. The block diagram which shows the structure of the laser marking apparatus of this invention. Parts alignment diagram of a conventional laser marking device. The principle figure of the linear irradiation of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wedge-shaped front-end | tip 2 Outgoing surface 3 Incident surface 4 Outgoing part 5 Incident part 6 Adhesive part 7 Cylindrical part 8 Base 9 Laser chip 10-1-4 Laser line generator 11 Laser line generator 15 Laser 50 Laser marking device 51 Laser light Module 52 that irradiates laser beam in a spot shape 53 Laser module that irradiates laser light in a spot shape 53 Irradiation switching means 54 Power supply means 61 Rod lens 62 Condensing or collimation lens 70 Wedge shaped surface 80 Circular chamfered shaped surface 90 Irradiated surface L- 1, 2, 3 Incident light L-4, 5, 6 Outgoing light

Claims (7)

An incident surface for condensing or collimating the captured laser beam; and a wedge-shaped exit surface for irradiating the captured laser beam in a straight line, and a tip of the wedge-shaped exit surface is a circular chamfer. No shape,
A laser line generator which is molded by glass or resin.   The laser line generator, wherein the incident part having the incident surface and the emission part having the emission surface are molded by the glass or the resin and bonded together to be integrated.   A laser module, wherein the laser line generator and the laser according to claim 1 or 2 are incorporated in a housing and irradiate laser light linearly.   3. A laser module, wherein the laser line generator according to claim 1 is directly incorporated on a laser case and irradiates a laser beam in a straight line.   3. A laser module, wherein the laser line generator according to claim 1 is formed by being directly incorporated in place of a laser window glass and irradiating a laser beam linearly.   6. The laser module according to claim 5, wherein the emission surface of the laser module according to claim 5 has an emission surface that becomes a spot-like irradiation by condensed light or parallel light, and irradiates the laser beam in a spot shape.   6. A laser module for linearly irradiating the laser beam according to claim 3; and an emission surface having an emission surface that is a spot-like irradiation by condensing or parallel light; A laser module for irradiating a laser beam, an irradiation switching means, and a power supply means are incorporated in a housing, and the irradiation switching means performs the linear and spot irradiation simultaneously or individually. Ejecting device.

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