TW201837532A - Irradiation device, line generator, and adjusting method for the irradiation device - Google Patents

Abstract

An objective of this invention is to obtain an irradiation device which is capable of adjusting an emission angle of light and stably maintaining an adjusted emission angle of the light. The irradiation device of this invention includes a light source 21, a light source holding member 22 for holding light source, a collimating lens 23 on which a light beam from the light source is incident, a lens holding member 24 for holding the collimating lens, a fastening member 27 fastened to the lens holding member for fixing the positional relationship of the light source and the collimating lens. A void 222 is located in a direction perpendicular to the optical axis of the collimating lens where between the light source holding member and the fastening member, and the light source is parallel movable in the direction perpendicular to the optical axis of the collimating lens when the fastening member is being loosened.

Description

 Irradiation device, reference marker, and adjustment method of illumination device  

The present invention relates to an illumination device, a reference marker, and an adjustment method of the illumination device.

There is known an illumination device that forms a laser beam of diffused light emitted from a laser light source into a parallel beam by a collimating lens, and the parallel beam is directed toward a predetermined direction by an illumination element. Diffusion, and cast light on the surface of the projection object. Such an irradiation device is used as an irradiation device for a reference line marker that irradiates line light in a vertical direction or a horizontal direction to an object.

When the positional relationship between the laser light source, the collimator lens, and the illuminating element has shifted, the optical axis of the emitted light beam from the illuminating device is inclined with respect to the main body of the illuminating device. Thus, there is a need for an illumination device capable of adjusting the tilt of the optical axis of the emitted light beam with respect to the body of the illumination device.

For example, Patent Document 1 discloses a collimating device that changes a positional relationship between an illuminating light source and a lens system by a lens holding portion position adjusting member that is in contact with a lens holding member. The V-groove or the inclined surface of the tapered hole is arranged.

Patent Document 2 discloses a laser measuring machine including a conical reflective optical member that reflects laser light in all directions of 360 degrees and forms a horizontal reference surface, and the laser light emitting portion and the reflective optical member are disposed on An inner case, and the inner casing is suspended from the top plate of the body. In Patent Document 3, a two-dimensional level has been disclosed which is integrally provided with a radiation lens system that forms laser light into parallel beams, and radiates a parallel beam in a vertical direction in a horizontal direction. Conical mirror. In Patent Document 4, a synthetic resin concave lens for irradiating a reference laser line has been disclosed.

Further, as shown in Fig. 9, an irradiation device 101 is known which adjusts the tilt of the optical axis of the outgoing beam with respect to the body of the illumination device by adjusting the angle of the optical element with respect to the collimator lens. In Fig. 9, the irradiation device 101 includes a laser light source 121, a light source holder 122, a collimator lens 123, a collimator lens holder 124, a rod lens 125 as an illumination element, and a rod. The lens holder 126 and the lens barrel 129.

The laser light source 121 is fixed to the light source holder 122. The collimator lens 123 is held by a substantially cylindrical collimator lens holder 124. The collimator lens holder 124 is held by the substantially cylindrical lens barrel 129, and the collimator lens holder 124 and the lens barrel 129 are fixed after being aligned. The light source holder 122 and the lens barrel 129 are integrally fixed by a screw 127. The rod lens 125 is fixed to the rod lens holder 126. The rod lens holder 126 is fastened and coupled to the barrel 129 by two angle adjusting screws 128 disposed on both sides with the rod lens 125 interposed therebetween. Further, the rod lens holder 126 has a convex portion 1261 having a curved end shape at the center. The convex portion 1261 is in contact with the inclined surface on both sides of the V-shaped groove 1241 provided in the collimator lens holder 124.

The laser light source 121 emits laser light toward the collimator lens 123. The outgoing beam from the collimator lens 123 is a parallel beam and is incident on the rod lens 125. The outgoing beam from the rod lens 125 is fan-shaped and directed toward the projection target surface toward the direction orthogonal to the plane of the drawing in FIG.

In the fastening portion to which the screw 128 is adjusted by the angle adjustment, an appropriate gap is formed between the rod lens holder 126 and the lens barrel 129. By adjusting or tightening the two angle adjustment screws 128, the width of the gap changes, and the distance between the lens barrel 129 and the rod lens holder 126 in the portion of each angle adjustment screw 128 varies. With this configuration, the inclination of the rod lens holder 126 is changed with the convex portion 1261 as a fulcrum, and the angle of the rod lens 125 with respect to the collimator lens 123 can be adjusted.

Furthermore, as shown in FIG. 10, there is known an illumination device 201 having a half mirror 235 and adjusting the optical axis of the outgoing beam relative to the illumination by adjusting the angle of the half mirror 235. The tilt of the device body. As shown in Fig. 10(a), the half mirror 235 is obliquely fixed to the plane of the half mirror holder 236 at an angle of about 45 degrees. The half mirror holder 236 is fastened and coupled to the barrel 129 by an angle adjusting screw 238 disposed on the upper side and the lower side of the inclined surface of the half mirror 235. Further, the half mirror holder 236 is provided with a convex portion 2361 having a curved end shape at the center, and is in contact with the inclined surface on both sides of the V-shaped groove 1241 provided in the lens barrel 129.

In the fastening joint portion by the angle adjusting screw 238, a proper gap is formed between the half mirror holder 236 and the lens barrel 129. By locking or loosening the two angle adjustment screws 238, the inclination of the half mirror holder 236 changes with the convex portion 2361 as a fulcrum. That is, the illumination device 201 adjusts the angle of the half mirror 235 with respect to the collimator lens 123 by the angle adjustment screw 238.

As shown in Fig. 10(b), by locking the angle adjustment screw 2381 to the lower side of the inclined surface (i.e., the left side of the paper surface), the half mirror holder 236 is inclined toward the left side of the paper. Thereby, the angle of the half mirror holder 236 with respect to the body of the illumination device 201 can be increased.

Further, as shown in Fig. 10(c), the half mirror holder 236 is inclined toward the right side of the sheet by adjusting the angle adjusting screw 2382 to the side of the upper side of the inclined surface (i.e., the right side of the sheet). Thereby, the angle of the half mirror holder 236 with respect to the body of the illumination device 201 can be reduced.

However, in a mechanism in which an optical element such as a rod lens or a half mirror is tilted and held, the angle of the optical element may fluctuate due to changes in the environment or the like. Therefore, there is a need for an irradiation apparatus capable of stably maintaining the emission angle of the adjusted laser light.

 [Previous Technical Literature]    [Patent Document]  

Patent Document 1: Japanese Laid-Open Patent Publication No. 01-152406

Patent Document 2: Japanese Laid-Open Patent Publication No. -05-272973

Patent Document 3: Japanese Laid-Open Patent Publication No. 06-331356

Patent Document 4: Japanese Patent No. 3697690

An object of the present invention is to provide an irradiation apparatus capable of adjusting an emission angle of a light beam and stably maintaining an adjusted emission angle by fastening a coupling member.

The illumination device of the present invention comprises: a light source; a light source holding member for holding the light source; a collimating lens for incident light beam from the light source; a lens holding member for holding the collimating lens; and a fastening member for fastening And a lens holding member for fixing a positional relationship between the light source and the collimating lens; wherein, between the light source holding member and the fastening connecting member, there is a gap in a direction orthogonal to an optical axis of the collimating lens; When the solid link member is released, the light source can move in parallel toward a direction orthogonal to the optical axis of the collimator lens.

According to the present invention, it is possible to adjust the angle of incidence of the light beam, and it is possible to stably maintain the adjusted emission angle by fastening the joint member.

1, 20, 30, 101, 201‧‧‧ illumination devices

2‧‧‧ring mechanism

4‧‧‧Importing device holder

5‧‧‧ ring body

6‧‧‧Ring frame holder

7‧‧‧ ring support feet

11‧‧‧Light source unit for vertical projection

12‧‧‧Horizontal projection light source unit

21, 121‧‧ ‧ laser source

22, 42, 122‧‧‧ Light source holder

23, 123‧‧ ‧ collimating lens

24, 124‧‧‧ Collimating lens holder (lens holding member)

25, 125‧‧‧ rod lens

26, 126‧‧‧ rod lens holder

27‧‧‧ fastening joint members

28‧‧‧Adjustment components

29, 39, 49, 129‧‧ lens barrel (lens holding member)

34‧‧‧Lens holder

35, 235‧‧‧ half mirror

45‧‧‧reflecting members

46‧‧‧Reflecting member holder

47‧‧‧ Covering glass

48‧‧‧glass holder

51 to 53‧‧‧ circuit board

127‧‧‧ screw

128, 238, 2381, 2382‧‧‧ Angle adjustment screw

221‧‧‧ upper surface

222‧‧‧through holes

223‧‧‧Adjustment hole

236‧‧‧Half mirror holder

241‧‧‧ bottom

242‧‧‧ holes

271‧‧‧ head

272‧‧‧ fastening joints

273‧‧‧Spring washers

274‧‧‧Washers

281, 282‧‧‧ adjustment members (first adjustment member)

283, 284 ‧ ‧ adjustment member (second adjustment member)

531, 532‧‧ ‧ gap

1241‧‧‧V slot

1261, 2361‧‧ ‧ convex

Fig. 1 is a perspective view showing an embodiment of a reference marker having the irradiation device of the present invention.

Fig. 2 is a longitudinal sectional view of the above irradiation device.

Fig. 3(a) is a vertical cross-sectional view showing a state in which the light source holder provided in the irradiation device has moved toward the left side of the paper surface, and Fig. 3(b) shows a case where the light source holder has moved toward the right side of the paper surface. Longitudinal section view of the state.

Fig. 4 is a view showing another embodiment of the irradiation apparatus of the present invention, wherein (a) is a front view, (b) is a plan view, and (c) is a bottom view.

Fig. 5 is a longitudinal sectional view of the above irradiation apparatus.

Fig. 6(a) is a longitudinal sectional view showing a state in which the light source holder provided in the irradiation device has moved toward the left side of the paper surface, and Fig. 6(b) shows a case where the light source holder has moved toward the right side of the paper surface. Longitudinal section view of the state.

Fig. 7 is a view showing still another embodiment of the irradiation apparatus of the present invention, wherein (a) is a perspective view as viewed from the bottom surface side, (b) is a side view, (c) is a bottom view, and (d) is a B-B cross-sectional view.

Fig. 8 is a longitudinal sectional view of the above irradiation apparatus.

Fig. 9 is a longitudinal sectional view showing an irradiation device of the related art.

Figure 10 is a view showing another related art irradiation apparatus, wherein (a) is a longitudinal sectional view, and (b) is a screw which is shown in the above-mentioned irradiation apparatus, which has locked the left side of the paper surface of the angle adjusting screw provided in the irradiation apparatus. (C) is a longitudinal cross-sectional view showing a state in which the screw on the right side of the paper surface of the angle adjusting screw provided in the irradiation device is locked.

●Irradiation device (1) ●

Hereinafter, an embodiment of the irradiation apparatus of the present invention will be described with reference to the drawings.

●The composition of the laser reference marker

As shown in Fig. 1, the irradiation device 1 constitutes a part of the laser reference line marker 10. The laser reference line marker 10 includes an irradiation device 1, a gimbal mechanism 2, and an irradiation device holder 4. In Fig. 1, the description of the base of the laser reference mark 10 and the support integrated with the base has been omitted.

The ring frame mechanism 2 includes a ring body 5 and a ring holder 6. The ring body 5 is held by a toroidal frame holder 6 having a quadrangular shape. The ring holder 6 has a ring support leg 7 extending toward the outside in its four corners. The ring holder 6 can be substantially integrally supported with the base of the laser reference mark 10 by the ring support leg 7 being coupled to the support of the laser reference mark 10 (not shown).

The irradiation device holder 4 holds the irradiation device 1. In the present embodiment, the irradiation device holder 4 includes a plurality of irradiation devices 1. The plurality of irradiation devices 1 are, for example, the vertical projection light source unit 11 and the horizontal projection light source unit 12, and respectively irradiate the laser light in the vertical direction and the horizontal direction. Further, the number of the irradiation devices 1 included in the laser reference marker 10 is not limited to two, and may be one or three or more.

The irradiation device holder 4 is held by the ring body 5. The ring body 5 is swingably supported by the irradiation device holder 4 with the two axes orthogonal to each other in the horizontal direction as a center. That is, the illuminating device holder 4 is suspended so as to be swingable in all directions with respect to the susceptor of the laser reference marker 10. The irradiation device holder 4 is suspended by the ring mechanism 2, whereby the irradiation device 1 can always maintain the determined posture and accurately project a vertical or horizontal bright line.

●The composition of the irradiation device 1

As shown in FIG. 2, the irradiation device 1 includes a laser light source 21, a light source holder 22, a collimator lens 23, a collimator lens holder 24, a rod lens 25 as an irradiation element, a rod lens holder 26, and The lens barrel 29. The collimator lens holder 24 and the lens barrel 29 are examples of the lens holding member.

The laser light source 21 is, for example, a semiconductor laser element such as a laser diode. The laser light source 21 is connected to a power source (not shown) and includes a circuit board 51 for supplying a current to the light source 21. The circuit board 51 is a flat member that is disposed on the bottom surface side of the light source holder 22 at an appropriate interval and forms a side surface on the bottom side of the irradiation device 1.

The light source holder 22 is a substantially cylindrical member and holds the laser light source 21 substantially at the center. The laser source 21 can also be followed by a light source holder 22.

The collimator lens 23 is an optical element that forms a light beam incident from the laser light source 21 into a parallel beam and emits it. The collimator lens 23 is held by the collimator lens holder 24.

Further, the collimator lens 23 may be composed of one optical element or a lens optical system using a plurality of lenses.

The collimator lens holder 24 is a substantially cylindrical member having a central axis in the emission direction of the beam of the laser light. The collimator lens holder 24 is held with a collimator lens 23 at substantially the center thereof. The outgoing beam from the laser source 21 passes along the central axis of the collimator lens holder 24.

The lens barrel 29 is a substantially cylindrical member that holds the outer circumference of the collimator lens holder 24. At the time of assembly, the collimator lens holder 24 slides on the inner side of the lens barrel 29 in the front-rear direction toward the light path while holding the collimator lens 23. The alignment adjustment can be performed by this configuration. After the adjustment, the collimator lens holder 24 and the lens barrel 29 are then fixed.

The upper surface 221 of the light source holder 22 is in contact with the bottom surface 241 of the lens barrel 29. Each of the surface 221 of the light source holder 22 and the bottom surface 241 of the lens barrel 29 is provided with an appropriate corresponding guide mechanism (not shown). The light source holder 22 is slidable in a predetermined direction with respect to the bottom surface 241 of the lens barrel 29 when the laser light emission angle described later is adjusted. The guide mechanism may be, for example, a convex portion and a concave portion that are fitted to each other.

The light source holder 22 and the lens barrel 29 are fixed by the fastening member 27. The fastening member 27 is disposed at two positions symmetrical with respect to the center of the bottom surface of the light source holder 22. Further, the fastening member 27 is disposed on a cylinder axis of the adjustment member 28 to be described later. Moreover, the so-called cylindrical axis includes a virtual central axis passing through the interior of the adjustment member 28 and its extension. The fastening joint member 27 is, for example, a pan head screw. The head portion 271 of the fastening coupling member 27 protrudes from the bottom surface of the light source holder 22, and the fastening coupling member 27 can be locked or loosened from the outside of the irradiation device 1.

The light source holder 22 is provided with a through hole 222 through which the fastening member 27 is inserted, and communicates with the hole 242 provided in the lens barrel 29 . The diameter of the through hole 222 is larger than the outer diameter of the fastening portion 272 of the fastening coupling member 27. The holes 242 and the fastening member 27 are formed with mutually corresponding threads. A spring washer 273 and a washer 274 are disposed between the head portion 271 of the fastening member 27 and the light source holder 22 in this order. The light source holder 22 and the lens barrel 29 and the collimator lens holder 24 are integrally coupled by the locking force of the fastening coupling member 27 through the washer 274 and the spring washer 273.

Although the number of the fastening member 27 and the through hole 222 is two in the present embodiment, one or three or more may be used. Further, as the fastening member, a spring-loaded washer bolt may be used instead of the spring washer and the grub screw.

The rod lens 25 is a cylindrical optical element that diffuses an incident light beam in a predetermined direction. The optical axis of the rod lens 25 is orthogonal to the cylindrical axis.

Here, the optical axis refers to a virtual straight line defining a main point such as a principal point, a focus, and a node of the optical element on the axis. The optical axis in the rod lens 25 is a straight line that is orthogonal to the cylindrical axis and passes through the center of the lens. The optical axis in the collimating lens 23 refers to a straight line that is orthogonal to the plane of the lens and passes through substantially the center of the lens.

The rod lens 25 may be a semipermeable membrane formed in one part of the circumferential surface (for example, in the range of 180 degrees). When such a rod lens is used, the light beam that has penetrated the semipermeable membrane or the light beam that has been reflected by the semipermeable membrane will spread in a fan shape in one direction, and the range of the bright line irradiated to the object can be enlarged.

The rod lens holder 26 is a disk-shaped member, and the rod lens 25 is held by a groove formed in the center portion. The rod lens holder 26 is fixed to the lens barrel 29. The positional relationship between the rod lens holder 26 and the collimator lens holder 24 is always fixed in the finished body. In other words, the irradiation device 1 is a member that does not have a position adjustment member between the rod lens holder 26 and the collimator lens holder 24.

Between the rod lens holder 26 and the collimator lens holder 24, there is no gap of the illumination device 1 of the related art as shown in Fig. 8, the rod lens holder 26 and the collimator lens holder 24. The system is in contact with the surface.

The rod lens holder 26 and the lens barrel 29 can also be followed by an adhesive or the like. Further, the rod lens holder 26 and the lens barrel 29 may be integrally formed.

By the surface contact between the rod lens holder 26 and the lens barrel 29 without a gap therebetween, the positional relationship between the rod lens 25 and the collimator lens 23 can be stably maintained.

The emitted light beam from the laser light source 21 is emitted from the upper surface 221 of the light source holder 22 toward the direction substantially orthogonal to the upper surface 221, and is incident on the collimator lens 23. The emitted light beam from the collimator lens 23 is a parallel light beam, and is incident on the rod lens 25 at an angle substantially perpendicular to the cylindrical axis of the rod lens 25 (that is, substantially parallel to the optical axis of the rod lens 25). The rod lens 25 diffuses and emits the incident light beam in a direction orthogonal to the cylindrical axis of the rod lens 25, and the emitted light beam is projected on the projection target surface outside the irradiation position 1.

●The composition for adjusting the angle of laser light emission

As shown in FIG. 2, the light source holder 22 is provided with two adjustment members 28 that can be operated from the outside of the irradiation device 1. The two adjustment members 28 are, for example, substantially cylindrical, and are disposed at substantially the same position with respect to the cylindrical axes of the two adjustment members 28 facing each other. Further, the cylindrical axis of the adjustment member 28 is substantially parallel to the cylindrical axis of the rod lens 25.

The adjustment member 28 is, for example, a hexagon socket set screw. Moreover, the adjustment member 28 may be an auxiliary tool of any shape as long as it can move the light source holder 22 in parallel.

The light source holder 22 has an adjustment hole 223 corresponding to the outer diameter of the adjustment member 28. In the adjustment member 28 and the adjustment hole 223, threads that are screwed to each other are formed.

●Adjustment method of laser light exit angle

The irradiation device 1 can adjust the relative position of the laser light source 21 and the collimator lens 23 by moving the position of the light source holder 22 with respect to the lens barrel 29 in parallel with respect to the contact faces of the lens holders 29. In other words, the irradiation device 1 can adjust the emission angle of the laser light by moving the position of the laser light source 21 with respect to the collimator lens 23 in a direction orthogonal to the optical axis.

Hereinafter, a method of adjusting the emission angle of the laser light is shown.

First, the fastening joint member 27 is loosened. Since the diameter of the through hole 222 of the light source holder 22 is larger than the outer diameter of the fastening portion 272 of the fastening member 27, the light source holder 22 can face the direction orthogonal to the optical axis of the collimator lens 23. parallel movement. By pushing the two adjustment members 28 into the inside of the irradiation device 1, the light source holder 22 is moved toward a direction substantially parallel to the cylindrical axis of the rod member 25 (i.e., the left direction or the right direction in Fig. 2). .

As shown in Fig. 3(a), when the adjustment member 281 on the right side of the paper surface is locked to the left side of the paper surface, the light source holder 22 is moved toward the direction of the arrow shown in the drawing (i.e., the left side of the paper surface). Thus, the emitted light beam from the light source holder 22 is incident on the left side of the collimator lens 23 from the optical axis. As a result, the outgoing light beam from the collimator lens 23 is inclined toward the right side.

As shown in Fig. 3(b), when the adjustment member 282 on the left side of the paper surface is locked toward the right side of the paper surface, the light source holder 22 is moved toward the direction of the arrow shown in the drawing (i.e., the right side of the paper surface). Thus, the outgoing light beam from the light source holder 22 is incident on the right side of the collimator lens 23 from the optical axis. As a result, the outgoing light beam from the collimator lens 23 is inclined toward the left side. The directions of the arrows shown in Figs. 3(a) and 3(b) are examples of the first direction.

The two adjustment members 281, 282 are appropriately operated and adjusted so that the emitted light beam from the irradiation device 1 becomes a predetermined angle (first step). Specifically, the emitted light beam from the collimator lens 23 is adjusted so as to be orthogonal to the cylindrical axis of the rod lens 25 (that is, to be parallel to the optical axis of the rod lens 25). After the adjustment is completed, the position of the light source holder 22 is fixed by locking the fastening member 27 (second step).

The adjustment member 28 can be detached from the irradiation device 1, and the adjustment member 28 can be detached from the irradiation device 1 after adjustment.

Although the emission angle of the laser light from the irradiation device 1 can be adjusted by, for example, about ±1 degree, the present technical idea is not limited to this range.

The irradiation device 101 of the related art shown in Fig. 9 has a function of a fastening screw that adjusts the angle of incidence of the laser light, and has a fastening member that fixes the angle of incidence. On the other hand, the fastening member 27 and the adjustment member 28 of the present invention shown in Fig. 2 are different members. Therefore, even if the adjustment member 28 expands and contracts due to, for example, a temperature change or the like, the emission angle of the laser light does not change.

According to the irradiation device 1 of the present embodiment, the emission angle of the laser light can be adjusted, and the emission angle of the adjusted laser light can be stably maintained.

●Irradiation device (2) ●

Another embodiment of the irradiation apparatus according to the present invention will be described focusing on a portion different from the embodiment described above. The difference between this embodiment and the above-described embodiment is that a half mirror is provided in the optical path.

As shown in FIGS. 4(a) to 4(c) and 5, the irradiation device 20 includes a laser light source 21, a light source holder 22, a collimator lens 23, a lens holder 34, and another example of an illuminating element. The half mirror 35 and the lens barrel 39. In the description of the embodiment, the same components as those of the first embodiment described above are denoted by the same reference numerals.

The laser light source 21 is connected to a power supply (not shown) and includes a circuit board 52 for supplying a current to the light source 21. The circuit board 52 is a flat plate having a substantially quadrangular planar shape. The side surface of the circuit board 52 that faces the fastening coupling member 27 is bent toward the inner side in accordance with the fastening coupling member 27. With this shape, the head portion 271 of the fastening member 27 can be exposed from the outer surface of the irradiation device 20 without being hidden by the circuit board 52.

The half mirror 35 is an optical element that partially reflects one of the incident beams and penetrates a portion. The half mirror 35 penetrates a portion of the light beam that has passed through the collimator lens 23 in the vertical direction, and reflects the remaining portion of the light beam in the horizontal direction.

The lens holder 34 is a substantially cylindrical member and holds the collimator lens 23 substantially at the center of the inside of the cylinder.

The lens barrel 39 is a substantially cylindrical member that holds the lens holder 34. At the time of assembly, the lens holder 34 slides on the inner side of the lens barrel 39 in the front-rear direction toward the light path while holding the collimator lens 23. After the collimation adjustment, the lens barrel 39 and the lens holder 34 are then fixed. The lens barrel 39 holds the half mirror 35 at substantially the center of the upper surface at an angle of substantially 45 degrees.

The half mirror 35 is not limited to the equivalent of the intensity of the reflected light and the transmitted light, and may be various beam splitters.

In the circumferential direction of the light source holder 22, two adjustment members 28 are disposed to face each other at a position corresponding to the higher side and the lower side of the inclined surface of the half mirror 35.

The light beam emitted from the light source 21 passes through the inside of the lens holder 34 and enters the collimator lens 23. The outgoing beam from the collimator lens 23 is a parallel beam and is incident on the half mirror 35. The light beam incident on the half mirror 35 is partially penetrated and partially reflected and irradiated onto the projection target surface outside the illumination device 20. As long as a rod lens is provided on the light path of the half mirror 35, the light beam can be diffused in the vertical plane. As long as a rod lens is provided on the reflected light path of the half mirror 35, the light beam can be diffused in the horizontal plane.

A method of adjusting the emission angle of the laser light according to the present embodiment will be described. First, the fastening joint member 27 is loosened. The light source holder 22 is capable of moving to an excess portion of the diameter of the through hole 22. By pushing the two adjustment members 28 toward the inside of the irradiation device 20, the light source holder 22 is moved in parallel in a direction orthogonal to the optical axis of the collimator lens 23.

As shown in Fig. 6(a), when the adjustment member 281 on the right side of the paper surface is locked toward the left side of the paper surface, the light source holder 22 is moved toward the direction of the arrow shown in the drawing (i.e., the left side of the paper surface). As described above, similarly to the first embodiment, the outgoing light beam from the collimator lens 23 is inclined toward the right side. Therefore, the incident angle to the half mirror 35 becomes large, and the angle of the outgoing light beam from the irradiation device 20 with respect to the emission center axis of the laser light source 21 becomes large.

As shown in Fig. 6(b), when the adjustment member 282 on the left side of the paper surface is locked toward the right side of the paper surface, the light source holder 22 is moved toward the direction of the arrow shown in the drawing (i.e., the right side of the paper surface). Thus, the outgoing beam from the collimator lens 23 is tilted to the left. Therefore, the incident angle to the half mirror 35 becomes small, and the angle of the outgoing light beam from the irradiation device 20 with respect to the emission center axis of the laser light source 21 becomes small.

As described above, after the emission angle of the emitted light beam from the irradiation device 20 has been correctly adjusted, the fastening member 27 is locked and fixed to fix the light source holder 22 to the lens barrel 39.

As described above, according to the irradiation apparatus of the present embodiment, the emission angle of the laser light can be adjusted, and the emission angle of the adjusted laser light can be stably maintained.

●Irradiation device (3) ●

Another embodiment of the illuminating device according to the present invention will be described with a portion different from the embodiment described above as a center. The difference between the embodiment and the embodiment described above is that the first adjustment member is configured to move the light source holder toward the first direction, and the second adjustment member is configured to move the light source holder toward the first direction. Move in a second direction with a different direction.

As shown in FIGS. 7(a) to (d) and 8 , the irradiation device 30 includes a laser light source 21, a light source holder 42, a collimator lens 23, a lens holder 24, a lens barrel 49, and an illumination element. Another example of the reflection member 45, the reflection member holder 46, the cover glass 47, and the glass holder 48. In the description of the embodiment, the same configurations as those of the embodiment described above are denoted by the same reference numerals. Fig. 7(d) is a cross-sectional view taken along line B-B of Fig. 7(b).

The reflecting member 45 is a substantially conical member having a reflecting surface that reflects the laser light on the surface of the cone. The reflecting member 45 may also be, for example, a conical lens or a cone prism. The reflection member 45 is held such that the apex of the cone faces the side of the collimator lens 23. The axis of the cone of the reflecting member 45 is substantially parallel to the optical beam from the laser source 21 and the optical axis of the collimator lens 23.

The upper surface of the reflecting member 45 is held by the reflecting member holder 46. The reflection member holder 46 is a disk-shaped member having an outer diameter slightly larger than the upper surface of the reflection member 45.

The cover glass 47 is a colorless and transparent cylindrical member. A reflection member 45 is disposed in a space inside the cover glass 47, and the cover glass 47 covers the conical surface of the reflection member 45. One end of the cylinder covering the glass 47 is held by a substantially cylindrical glass holder 48. The inner diameter of one end of the glass holder 48 corresponds to the outer diameter of the side of the end of the lens barrel 49 from which the light beam from the collimator lens 23 is emitted, one end of the glass holder 48 and the aforementioned end of the barrel 49. It is fitted and fixed. The other end of the cylinder covering the glass 47 is fixed to the reflection member holder 46 so as to cover the outer surface of the upper surface of the reflection member 45.

The light beam emitted from the light source 21 passes through the inside of the lens holder 34 and enters the collimator lens 23. The outgoing beam from the collimator lens 23 is a parallel beam, and the center of the parallel beam is incident on the apex of the cone of the reflecting member 45. The light beam incident on the reflection member 45 penetrates the cover glass 47 and is emitted toward the direction orthogonal to the incident direction over 360 degrees (that is, the entire circumference).

The light source holder 42 is provided with four adjustment members. More specifically, the first adjustment members 281 and 282 and the second adjustment members 283 and 284 are provided. The four adjustment members are, for example, substantially cylindrical, and the cylindrical axes of the two first adjustment members 281 and 282 and the two second adjustment members 283 and 284 are disposed at substantially the same position with respect to each other. The first cylinder axis shared by the first adjustment members 281 and 282 and the second cylinder axis shared by the second adjustment members 283 and 284 intersect at substantially the center of the bottom surface of the light source holder 42. The first cylinder axis and the second cylinder axis are orthogonal.

In the present embodiment, a longitudinal cross-sectional view in which the side faces of the cylinders of the first adjusting members 281 and 282 are cut along the diameter of the bottom surface is substantially the same as a longitudinal cross-sectional view orthogonal to the longitudinal cross-sectional view. Therefore, Fig. 8 is a longitudinal sectional view showing the above two directions.

As shown in FIG. 8, the light source holder 42 is provided with four adjustment holes 223. The respective adjustment holes 223 correspond to the respective outer diameters of the four adjustment members 281 to 284. Threads screwed to the respective adjustment members are formed in the respective adjustment holes.

The light source holder 42 and the collimator lens holder 24 are fixed by two fastening members 27. The fastening member 27 is disposed at a point symmetrical with respect to the center of the bottom surface of the light source holder 22. Further, the fastening coupling member 27 is disposed at a position different from the first cylinder axis or the second cylinder axis. In the present embodiment, the fastening coupling member 27 is disposed between the first cylinder axis and the second cylinder axis in a rotation direction centering on the intersection of the first cylinder axis and the second cylinder axis.

The light source 21 is connected to a power supply (not shown) and includes a circuit board 53 for supplying a current to the light source 21. In the present embodiment, the circuit board 53 is formed into a substantially circular flat plate outside the plane, and substantially circular notches 531 and 532 are formed at positions corresponding to the fastening connecting members 27. Therefore, even in this embodiment, the head portion 271 of the fastening member 27 can be exposed from the outer surface of the irradiation device 30, and the fastening member 27 can be loosened from the outside.

A method of adjusting the emission angle of the laser light according to the present embodiment will be described. First, the fastening joint member 27 is loosened. By pushing the two first adjustment members 281, 282 toward the inside of the irradiation device 30, respectively, the light source holder 22 is moved in parallel in a direction orthogonal to the optical axis of the collimator lens 23. By pushing the two second adjustment members 283, 284 toward the inside of the irradiation device 30, respectively, the light source holder 22 is moved in parallel in the second direction. The second direction means a direction orthogonal to the optical axis of the collimator lens 23 and a direction different from the direction in which the first adjustment members 281 and 282 can move. In the present embodiment in which the first cylinder axis and the second cylinder axis are orthogonal, the first direction and the second direction are orthogonal. The angle of the light beam emitted from the collimator lens 23 with respect to the reflection member 45 changes in two directions in accordance with the movement of the light source holder 22.

The emission angle of the emitted light beam from the collimator lens 23 is changed in two directions, the inclination of the irradiation line emitted from the reflection member 45 is adjusted, and the center of the emission beam is made coincident with the apex of the reflection member 45 and the brightness of the illumination line or The line width is adjusted in an equal manner. After the adjustment, the fastening joint member 27 is locked to fix the light source holder 22 to the lens barrel 49. After the fixing, the four adjusting members 281 to 284 can also be detached from the illuminating device 30.

According to the irradiation apparatus of the present embodiment, it is possible to adjust the incident angle of the light beam incident on the reflection member, and to irradiate the illumination line having uniform brightness or line width throughout the entire circumference, and the reflection member has a reflection surface on the surface of the cone.

Furthermore, in describing the present invention, although the laser reference line marker is assumed to be described, the technical idea of the present invention is not limited to the laser reference line marker, but can be applied to, for example, a laser pointer (laser pointer). ) etc. All devices that emit lasers.

Claims (11)

 An illumination device comprising: a light source; a light source holding member for holding the light source; a collimating lens for incident light beam from the light source; a lens holding member for holding the collimating lens; and a fastening member; Fastened and coupled to the lens holding member for fixing a positional relationship between the light source and the collimating lens; wherein the light source holding member and the fastening connecting member are orthogonal to an optical axis of the collimating lens The direction has a gap; when the fastening member is released, the light source can move in parallel in a direction orthogonal to the optical axis of the collimating lens.    The illumination device according to claim 1, wherein the light source holding member and the lens holding member are in surface contact with each other on a contact surface, and the light source holding member slides on the contact surface with respect to the lens holding member.    The illumination device according to claim 1, wherein the light source holding member is provided with a first adjustment member capable of positionally adjusting the light source holding member in a first direction orthogonal to an emission direction of the light source. The first adjustment member adjusts a position of the light source holding member relative to the collimating lens.    The illuminating device according to claim 3, wherein the light source holding member is disposed in a direction orthogonal to an optical axis of the collimating lens to adjust the light source holding member relative to the collimating lens The adjustment hole at the position, and the first adjustment member is screwed to the adjustment hole.    The illuminating device according to claim 3, further comprising: a second adjusting member for adjusting a position of the light source holding member relative to the collimating lens; and the second adjusting member for arranging the light source holding member Moving in a second direction that is orthogonal to the direction in which the light source is emitted and that is different from the first direction.    The illuminating device of claim 5, wherein the first direction and the second direction are orthogonal.    The illuminating device according to claim 1, further comprising: an illuminating element for receiving a light beam from the collimating lens and irradiating the illuminating beam; and an illuminating element holding member for holding the illuminating element; the illuminating element The holding member is in close contact with the aforementioned lens holding member.    The illuminating device according to claim 1, wherein when the light source is moved in parallel in a direction orthogonal to an optical axis of the collimating lens, an angle of incidence of a light beam emitted from the collimating lens changes.    The illuminating device according to claim 1, which does not have a mechanism for adjusting the inclination of the illuminating member holding member with respect to the lens holding member.    A reference line marker is provided with an irradiation device for irradiating a line of light to an object, wherein the irradiation device is the irradiation device according to any one of claims 1 to 9.    A method for adjusting an illumination device for adjusting an angle of an emission beam of an illumination device, wherein the illumination device comprises: a light source; a collimating lens for incident light beam from the light source; and a lens holding member for holding a collimating lens; and a fastening connecting member fastened to the lens holding member for fixing a positional relationship between the light source and the collimating lens; the adjusting method has a first step of adjusting orthogonal to the quasi-alignment a relative position of the light source in a direction of an optical axis of the straight lens with respect to the collimating lens; and a second step of fastening the lens holding member and the light source by the fastening joint member.