JP4159134B2 - Alignment method for illumination light source - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an alignment method for an illumination light source having a reflector.
[0002]
[Prior art]
In the conventional alignment method of this type of illumination light source, for example, as shown in FIG. 4, a reflector 1 having a reflective spherical surface 1a is provided with a cylindrical portion 1b, and on the other hand, a circular tube formed of quartz glass. The illumination tube 2 has a light emission source 3 in the center thereof.
[0003]
The cement 5 is injected from before and after the reflector 1 by a syringe 4 at a position where the light source 3 matches the focal point of the reflector 1, and the cement 5 is solidified by the heat of the light source 3 to form a circular tube portion of the illumination tube 2. The alignment was performed by fixing the cylindrical part 1b of the reflector 1 to 2a.
[0004]
[Problems to be solved by the invention]
However, the conventional method for aligning a light source for illumination has a problem that the inner surface of the reflector 1 is contaminated due to cement dripping, or it is necessary to wait several tens of minutes or more for the cement 5 to harden, resulting in extremely poor productivity. It was.
[0005]
An object of the present invention is to provide an illumination light source alignment method in which an illumination tube can be aligned and fixed to a cylindrical portion of a reflector in a short time, and the inner surface of the reflector is not soiled.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention , an illumination tube is moved in a three-dimensional direction of x, y, z by positioning means, and an illumination source of the illumination tube is positioned at a focal position of a reflector having a reflecting spherical surface. In a light source alignment method, a cylindrical cap having a collar portion on the outer end side in the x and y planes perpendicular to the z direction is fixed to the circular tube portion of the illumination tube having an axial center in the z direction. In addition, a cylindrical collar having an inner diameter larger than the outer diameter of the cylindrical base, and having a collar portion on the outer end side that is in contact with the collar portion of the cylindrical base in the x and y planes, is provided in the z direction of the reflector. The cylindrical tube having an axial center is held in an inserted state via an inorganic adhesive, the cylindrical base is loosely inserted into the cylindrical collar, and the lighting tube is in contact with both flanges by the positioning means. Is moved in the x and y directions to After the y coordinate position to match that of the focal position, both flange portions joined by laser welding, then is moved accompanied the movement of the cylindrical collar via the Ryotsuba portion illumination tube in the z-direction emission the z-coordinate position of the source is matched to that of the focal position, or one prior Symbol inorganic adhesive by heating from the side, characterized in that to fix the cylindrical collar to the cylindrical portion of the reflector.
[0007]
According to the present invention , since the collar portion of the cylindrical base is positioned with respect to the collar portion of the cylindrical collar in the x and y directions and then laser welding is performed, the alignment and fixing of the x and y coordinates of the illumination light source are performed smoothly. Since the inorganic color adhesive is heated and fixed from the side after the cylindrical collar is slid and positioned with respect to the cylindrical portion of the reflector in the z direction, the x, y and z directions of the illumination light source are fixed. Positioning and fixing can be performed in a short time.
[0008]
Further, according to the present invention , the amount of the inorganic pressure-sensitive adhesive used is extremely small, and the problem of contamination of the inner surface of the reflector due to cement dripping as in the conventional example does not occur.
[0009]
[0010]
[0011]
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
FIG. 1 is an explanatory view showing an alignment method of an illumination light source according to this embodiment, and FIG. 2 is a perspective view of a cylindrical collar.
[0014]
In the present embodiment, as shown in FIG. 1, a cylindrical shape having a disk-shaped flange portion 7a in advance in a circular tube portion 12a of a glass lighting tube 12 provided with a light source 3 in a central spherical bulge portion. The base 7 is fixed with an inorganic adhesive such as cement. A cylindrical collar 8 with a flange 8a in which a gap of about 0.5 mm to 2 mm is generated with respect to the outer periphery of the cylindrical base 7 is formed in the cylindrical shape of the reflector 1 having an elliptical spherical surface or a hyperbolic spherical reflecting surface 1a in advance. It arrange | positions in the state which apply | coated the paste-form glass solder 9 to the part 1b.
[0015]
The cylindrical base 7 and the cylindrical collar 8 are preferably made of a metal such as brass.
[0016]
Next, the end portion of the illumination tube 12 provided with the light source 3 is gripped, and the positioning means 20 that can move in the three-dimensional directions of x, y, and z in the drawing is driven, and both the flange portions 7a and 8a are moved. Centering alignment is performed by moving the illumination tube 12 in the direction of the contact surface, that is, in the x and y directions while maintaining the contact state. A pulse laser of several ms to several tens of J and several ms is irradiated from the laser emitting barrel 10 at a position where the x and y coordinate positions of the light emitting source 3 coincide with those of the focal position of the reflector 1, and a metal contact portion, that is, a cylindrical shape The collar 8a of the collar 8 and the collar 7a of the cylindrical base 7 are welded.
[0017]
Next, the positioning means 20 is driven in the z direction, and the illumination tube 12 is taken in and out of the cylindrical portion 1b of the reflector 1, so that the z coordinate position of the light emitting source 3, and hence the x, y, and z coordinate positions, are reflected. When adjusted to match that of one focal point, the glass solder 9 is heated by laser irradiation from the laser emitting lens barrel 11 in the side surface direction of the cylindrical collar 8. As laser conditions at this time, it is preferable to inject energy of several J to several tens of J and several tens of Hz to several hundreds of Hz for a high repetition pulse, and several J to several hundred J of energy for a CW laser.
[0018]
By this heating, the paste-like glass solder 9 is welded, and the cylindrical portion 1b of the reflector 1 and the cylindrical collar 8 are fixed. Instead of the glass solder 9, other inorganic adhesive such as ceramic solder or cement may be used.
[0019]
In addition, as shown in FIG. 2, by forming a cut 14 in the z direction in the cylindrical collar 8, even when the thermal expansion coefficients of the cylindrical collar 8 and the reflector 1 are different, the cut 14 absorbs stress. It is possible to prevent cracking of the glass solder 9 at the time of re-fixing after melting. Therefore, ceramic glass having a low expansion coefficient can be used as a material for the reflector 1, and an illumination light source (lamp) having high temperature heat resistance can be provided.
[0020]
FIG. 3 is an explanatory view showing an alignment method of an illumination light source according to a reference example .
[0021]
In this reference example , when the illuminating tube 12 is moved in the x, y, and z directions by the positioning means 20 and adjusted so that the light source 3 of the illuminating tube 12 is positioned at the focal point of the reflector 1 having the reflective spherical surface 1a. A preformed flexible glass solder 13 is inserted between the circular tube portion 12a of the illuminating tube 12 and the cylindrical portion 1b of the reflector 1, and a laser emitting mirror is formed from the side surface of the cylindrical portion 1b of the reflector 1. Laser welding is performed by the cylinder 11 to perform welding.
[0022]
The glass solder 13 is preferably formed in advance in a sponge-like shape having cushioning properties.
[0023]
Alternatively, the glass solder 13 may be formed in a green sheet shape, and this may be wound around the circular tube portion 12a of the lighting tube 12 and inserted into the cylindrical portion 1b.
[0024]
Further, the glass solder 13 may be preformed by dissolving it in a paste that exhibits softness when pressure is applied.
[0025]
Further, since the flexible glass solder 13 is used, when the x, y, z coordinates of the light source 3 are aligned with the focal point, the inclination angle (θ coordinate) of the illumination tube 12 with the glass solder 13 as a fulcrum is obtained. Obviously, it is possible to employ an rθ coordinate system alignment that adjusts and adjusts the amount (r coordinate) of the illumination tube 12 with respect to the cylindrical portion 1b.
[0026]
Instead of the preformed flexible glass solder 13, an inorganic preform binder made of ceramic solder, cement, or the like that is deformed by pressurization may be used.
[0027]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the alignment method of the light source for illumination which can perform positioning of a light source and fixation of an illumination tube rapidly can be provided, without polluting the inner surface of a reflector.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of an alignment method for an illumination light source according to an embodiment of the present invention.
2 is a perspective view of a cylindrical collar containing cuts used in the above embodiment.
FIG. 3 is an explanatory diagram of an alignment method of an illumination light source according to a reference example .
FIG. 4 is an explanatory diagram of a conventional alignment method of an illumination light source.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Reflector 1a Reflecting spherical surface 1b Cylindrical part 3 Light emission source 7 Cylindrical base 7a Rinse part 8 Cylindrical collar 8a Rinous part 9 Glass solder (inorganic adhesive)
DESCRIPTION OF SYMBOLS 10 Laser emitting lens 11 Laser emitting lens 12 Illumination tube 12a Circular tube part 13 Glass solder (preform binder)
14 Cutting 20 Positioning means

Claims (4)

In an alignment method of an illumination light source in which an illumination tube is moved in a three-dimensional direction of x, y, and z by positioning means to position a light source of the illumination tube at a focal position of a reflector having a reflective spherical surface, A cylindrical base having a collar part on the outer end side in the x and y planes perpendicular to the z direction is fixed to the circular tube part of the centered lighting tube in a fitted state, and from the outer diameter of the cylindrical base A cylindrical collar having a large inner diameter and provided with a collar portion on the outer end side that contacts the collar portion of the cylindrical base in the x and y planes is formed on the cylindrical portion having an axis in the z direction of the reflector. Hold in an inserted state through an adhesive, loosely insert the cylindrical base into the cylindrical collar, and move the illumination tube in the x and y directions with the collars in contact with each other by the positioning means. X and y coordinate position of the focus position After Itasa, both flange portions joined by laser welding, then the focal position z coordinate position of the light emitting source is moved accompanied the movement of the cylindrical collar via the Ryotsuba portion illumination tube in the z-direction alignment method of the illumination source, characterized in that it is matched to secure the or one prior Symbol inorganic adhesive the cylindrical collar by heating from the side to the cylindrical portion of the reflector.   2. The illumination light source alignment method according to claim 1, wherein a z-direction cut is formed in the cylindrical collar.   The method for aligning an illumination light source according to claim 1 or 2, wherein the inorganic adhesive is glass solder.   4. The method for aligning an illumination light source according to claim 1, wherein the inorganic adhesive is heated from the side by laser irradiation to fix the cylindrical collar to the cylindrical portion of the reflector.

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