JP4647314B2 - LIGHT SOURCE DEVICE, ITS MANUFACTURING METHOD, AND RECORDING DEVICE - Google Patents

Description

The present invention relates to a light source device for an optical recording system that requires high-precision recording, a method for manufacturing the same, and an apparatus configured using the light source device.

  The light source device is also used in printing apparatuses such as a printing plate making machine, a printing plate block making machine, a printer using a photosensitive drum, a copying machine, and a FAX. In a light source device using a semiconductor laser or the like, as its optical characteristics, the directivity of laser light emitted from the light source device, the parallelism of a light beam, and the like are required. The light source device needs to obtain the relative position between the light emitting point of the semiconductor laser and the lens with high accuracy.

  Conventional techniques aimed at increasing the accuracy of the relative position between the light emitting element and the lens include “light source unit” disclosed in Patent Document 1, “light source device” disclosed in Patent Document 2, and Patent Document 3. The disclosed “light source device” can be mentioned.

  An object of the invention disclosed in Patent Document 1 is to facilitate adjustment of the position of an optical system of a light source unit for multi-beam radiation. The invention disclosed in Patent Document 1 is an optical system jig provided with an attachment portion for fixing a laser diode and an optical system, and a bar body having a groove therebetween, and having an opening in contact with the optical system from the groove side or the opposite side. Is provided on the bar body. Then, the control means moves the optical system jig along the optical axis in the optical system drive system based on the output of the beam focal position detection means for detecting the focal position of the beam emitted from the optical system. Based on the output of the beam direction detecting means for detecting the beam direction, the LD jig for holding the laser diode by the LD driving means is moved along a plane perpendicular to the optical axis.

  Further, the invention disclosed in Patent Document 2 aims to reduce energy loss when the lens barrel is assembled using an ultraviolet curable adhesive. In the invention disclosed in Patent Document 2, an ultraviolet curable adhesive is interposed between a cylindrical portion of a laser holder that holds a semiconductor laser and a protruding portion of a transparent lens barrel that is integrally formed with a collimator lens. The ultraviolet curable adhesive is cured by the ultraviolet rays irradiated from the ultraviolet irradiator. The surface of the protruding portion of the lens barrel is raised in a convex shape and functions as a lens that collects ultraviolet rays.

  In addition, the invention disclosed in Patent Document 3 has a small number of components, and there is no risk of misalignment during assembly, and the collimator lens can be bonded using a photo-curing adhesive. An object of the present invention is to provide a highly accurate light source device. The invention disclosed in Patent Document 3 includes a base having a fitting hole penetrating the front and back, a semiconductor laser located on the back side of the base and fitted in the fitting hole, and a front surface of the fitting hole. A collimator lens positioned on the front face and held coaxially with the optical axis of the semiconductor laser; and an aperture forming member for shaping the laser light emitted from the collimator lens; A lens support portion having a large arc-shaped cross section is positioned on the front surface of the fitting hole so as to be concentric with the optical axis of the semiconductor laser, and is integrally formed with the base. A collimator lens is placed on the lens support portion with an ultraviolet curing adhesive Used for adhesive fixing.

Japanese Patent Laid-Open No. 05-113545 Japanese Patent Application Laid-Open No. 07-325241 Japanese Patent Laid-Open No. 09-246657

  However, in the invention disclosed in Patent Document 1, the positional relationship between the semiconductor laser and the lens is held separately, and the adjustment in the focal direction, that is, the optical axis direction is performed by adjusting the lens position, and the beam position, that is, the light Position adjustment in a plane perpendicular to the axis is performed by adjusting the position of the semiconductor laser. In this method, since the semiconductor laser and the lens are separately held, there is a problem that the structure of the base for holding becomes complicated and the cost is high, but as a bonding method after the position is determined, Since welding using a YAG laser is used, there is a concern that the position of the semiconductor laser or lens may be shifted due to residual stress after bonding. In addition, there is no mention of any device for the semiconductor laser or lens holding method of the position adjusting mechanism for the above problem.

In the invention disclosed in Patent Document 2, the positional relationship between the semiconductor laser and the lens is not adjusted with respect to the two axes in the direction perpendicular to the optical axis direction, and positioning is performed with accuracy of mechanical fitting. is doing. Then, after adjusting the focus in the optical axis direction, the positional relationship between the two is fixed using an ultraviolet curable adhesive. The UV curable adhesive is advantageous for shortening the production tact and is excellent in reliability, so it is often used for lens bonding.
However, in recent years, the resolution and accuracy of image recording devices and the like have been increasing, and optical recording light source devices often used in image recording devices are also required to have high accuracy. It is requested. Therefore, there is a limit to positioning by mechanical fitting, and it is necessary to adjust the relative position of the light emitting point of the semiconductor laser and the lens in the three-axis (x, y, z) directions. Therefore, a light source device having a semiconductor laser and a lens must have a structure capable of adjusting the position in the three-axis direction and fixing at the adjusted position.

  The invention disclosed in Patent Document 3 has been made with the above points omitted. When the lens is fixed with an adhesive, since the shrinkage of the adhesive occurs at the time of curing, it is ideal to minimize the adverse effect on the optical characteristics due to the shrinkage. In particular, since the required accuracy in the z direction (optical axis direction) is high in the light source device, the contraction direction is not generated in the z axis direction. Therefore, in the x and y directions (two directions orthogonal to the optical axis direction), positional displacement after bonding due to contraction occurs. However, in order to ensure positional accuracy after bonding, a certain amount of contraction is expected. It is common to offset the initial position. However, since it is difficult to give an offset if the amount of contraction is not fixed, the contraction direction is limited to one direction of the contraction direction so as to be only one of the x and y directions.

  Further, in the light source device having the lens bonding structure as described above, chucking must be performed so that the lens does not move during bonding. Although there is no detailed description of the chuck mechanism in this patent, for example, when the lens is completely fixed by the chuck means, stress is generated between the lens and the first lens support portion due to the shrinkage of the adhesive after completion of the bonding. To do. This facilitates peeling of the adhesive. Further, when the chuck mechanism is released, a rapid reaction occurs in the lens, and there arises a problem that the positional accuracy of the lens is impaired. Therefore, when the chuck mechanism is movably provided, it is necessary to set conditions so that the lens positioning accuracy is not impaired.

  The present invention has been made in view of the actual state of the light source device as described above, and an object thereof is to obtain a light source device that has a high lens mounting accuracy with a lens bonding structure and has a high mounting strength and a small change with time in the mounting accuracy. It is in.

In the invention of claim 1, a light source, a base holding the light source, one or a plurality of lenses arranged coaxially with the optical axis of the light source, and a first lens support portion for supporting the lens And supporting the lens at a position symmetrical to the first lens support with respect to the optical axis of the lens. The second lens support portion is provided with a smaller rigidity in the radial direction of the lens than the first lens support portion . As a result, it is possible to obtain a light source device with a low-cost configuration with high assembly accuracy, less variation in assembly accuracy, high assembly strength, and less variation in beam position due to environmental changes and temporal changes after assembly.

In the invention of claim 2 , a light source, a base holding the light source, one or a plurality of lenses arranged coaxially with the optical axis of the light source, and a first lens support portion for supporting the lens And supporting the lens at a position symmetrical to the first lens support with respect to the optical axis of the lens. A second lens support part for bonding, and an adhesive for bonding the second lens support part and the lens is compared with an adhesive for bonding the first lens support part and the lens. Thus, the rigidity after curing is reduced. As a result, it is possible to obtain a light source device with a low-cost configuration with high assembly accuracy, less variation in assembly accuracy, high assembly strength, and less variation in beam position due to environmental changes and temporal changes after assembly .

According to a third aspect of the present invention, in the first or second aspect , the first lens support portion and the second lens support portion are made of the same material or have substantially the same coefficient of thermal expansion. Thereby, it is possible to prevent a decrease in lens position accuracy due to a temperature change.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the light source and the optical axis direction of the lens are set in a horizontal direction when the lens is bonded. Thereby, it is possible to reduce variations in lens position due to gravity and stress applied to the bonding surface during lens bonding.

According to a fifth aspect of the present invention, in the fourth aspect, the shape of the adhesive surface of the first lens support portion is substantially symmetric with respect to a vertical plane including the optical axis of the lens. This makes it possible to easily set the offset amount of the lens at the initial position of the lens and the configuration of the lens chuck means by limiting the shrinkage direction of the adhesive to the vertical direction.

According to a sixth aspect of the present invention, in the fifth aspect, the shape of the adhesive surface of the first lens support portion is an arc shape having a diameter slightly larger than the outer peripheral circle of the lens, and the optical axis of the light source It is formed in the said base so that it may become concentric with. As a result, the thickness of the adhesive layer can be made uniform, uneven adhesion can be prevented, and efficient bonding can be performed.

According to a seventh aspect of the present invention, in the sixth aspect, the shape of the adhesive surface of the first lens support portion is a semicircular arc or less. Accordingly, it is possible to further facilitate the configuration of the lens chuck means and the offset amount of the initial position of the lens by limiting the contraction direction of the adhesive to the vertical direction.

According to an eighth aspect of the present invention, in the fourth aspect, the shape of the adhesive surface of the second lens support portion is substantially symmetrical with respect to a vertical plane including the optical axis of the lens. Thereby, even when the second lens support portion is provided, it is possible to limit the contraction direction of the adhesive to the vertical direction and to easily set the offset amount of the initial position of the lens and to configure the lens chuck means.

According to a ninth aspect of the present invention, in the eighth aspect, the adhesive surface of the second lens support portion is formed to be a flat surface in the horizontal direction. This makes it possible to reduce the rigidity of the second lens support portion in the radial direction of the lens.

The invention of claim 10 is a manufacturing method for manufacturing the light source apparatus according to any one of claims 4 to 9, and the lens and the first lens support portion by ultraviolet curing adhesive It is characterized by being fixedly bonded. This makes it possible to freely control the timing at which the adhesive hardens, allows bonding with little residual stress after bonding, makes the bonding process easy and flexible, and improves assembly accuracy. Become.

According to an eleventh aspect of the present invention, in the tenth aspect , the lens and the first lens support portion are bonded before the lens and the second lens support portion are bonded. Thereby, it is possible to reduce the variation in adhesion and to easily obtain the offset amount of the initial position of the lens.

According to a twelfth aspect of the present invention, in the eleventh aspect , the second lens support portion itself is mounted on the base after the adhesion between the lens and the first lens support portion is finished. Thereby, ultraviolet irradiation can be facilitated and the curing time of the ultraviolet curable adhesive can be shortened.

According to a thirteenth aspect of the present invention, in the twelfth aspect , the lens and the second lens support portion are fixedly bonded to each other with an ultraviolet curable adhesive. As a result, regarding the adhesion between the second lens support portion and the lens, it is possible to freely control the timing of curing of the adhesive and to make the bonding process easy and flexible.

Invention of claim 14, a manufacturing method for a light source device for manufacturing according to any one of claims 4-9, wherein the lens and the first lens support portion, said lens and said second lens It is characterized in that it is fixedly bonded to the support portion simultaneously with an ultraviolet curable adhesive. Thereby, it becomes possible to perform adhesion | attachment rapidly.

According to a fifteenth aspect of the present invention, in any one of the tenth to fourteenth aspects, the irradiation of ultraviolet rays is substantially symmetrical with respect to a vertical plane including the optical axis of the lens. Accordingly, it is possible to further facilitate the configuration of the lens chuck means and the offset amount of the initial position of the lens by limiting the contraction direction of the adhesive to the vertical direction.

According to a sixteenth aspect of the present invention, in the fifteenth aspect , the first lens support portion is provided with a hole. As a result, when an ultraviolet curable adhesive is used as the adhesive, ultraviolet irradiation can be facilitated, and the curing time of the ultraviolet curable adhesive can be shortened.

The invention according to claim 17 is characterized in that, in claim 15 , the first lens support portion is transparent. As a result, when an ultraviolet curable adhesive is used as the adhesive, ultraviolet irradiation can be facilitated, and the curing time of the ultraviolet curable adhesive can be shortened.

According to an eighteenth aspect of the present invention, in the fifteenth aspect , the second lens support portion is provided with a hole. As a result, when an ultraviolet curable adhesive is used as the adhesive, ultraviolet irradiation can be facilitated, and the curing time of the ultraviolet curable adhesive can be shortened.

The nineteenth aspect of the invention is characterized in that, in the fifteenth aspect , the second lens support portion is transparent. As a result, when an ultraviolet curable adhesive is used as the adhesive, ultraviolet irradiation can be facilitated, and the curing time of the ultraviolet curable adhesive can be shortened.

According to a twentieth aspect of the present invention, in any one of the tenth to nineteenth aspects, when the lens and the second lens support portion are fixedly bonded, the second lens support portion is preliminarily attached to the center in the radial direction of the lens. Distortion is given in the direction of moving away, and the distortion is removed after completion of bonding. As a result, it is possible to remove the distortion generated in the second lens support portion after the bonding is completed.

According to a twenty-first aspect of the present invention, in the tenth to twentieth aspects, the present invention has chuck means for holding the lens when the lens is bonded, and the chuck means regulates the operating direction of the lens only in the vertical direction. It is characterized by being. Accordingly, the moving direction of the lens at the time of bonding is limited to only one direction in the vertical direction, and it becomes possible to stably follow the movement of the lens due to the shrinkage of the adhesive.

According to a twenty-second aspect of the present invention, in the twenty-first aspect , when the lens is moved during bonding with respect to the initial lens position where the lens is set by the chuck means, the lens holding force of the chuck means is increased as it moves. It is made to become small. As a result, stable chucking of the lens can be realized, and stress applied to the lens during bonding can be reduced.

According to a twenty-third aspect of the present invention, in the twenty-second aspect , the chuck means includes a position adjustment mechanism having five degrees of freedom excluding at least a rotation direction around the optical axis of the lens. Thereby, the position of the lens with respect to the light source can be adjusted in the three-axis direction and the two rotation directions.

According to a twenty-fourth aspect of the invention, in the twenty-second aspect , the base is set in a position adjustment mechanism having a degree of freedom of 5 degrees excluding at least a rotation direction around the optical axis of the lens relative to the chuck means. It is characterized by being. Thereby, the position of the lens with respect to the light source can be adjusted in the three-axis direction and the two rotation directions.

According to a twenty-fifth aspect of the present invention, in the light source device according to any one of the first to ninth aspects, a plurality of combinations of the light source and the lens are provided on one base. This makes it possible to provide a highly accurate light source device having a plurality of light sources.

According to a twenty-sixth aspect of the present invention, in the manufacturing method according to any one of the tenth to twenty- fourth aspects, a plurality of combinations of the light source and the lens are provided on one base. This makes it possible to provide a highly accurate light source device having a plurality of light sources.

A recording apparatus according to a twenty-seventh aspect is characterized in that the light source apparatus according to any one of the first to ninth aspects or the light source apparatus manufactured by the method for manufacturing a light source apparatus according to any one of the tenth to twenty- sixth aspects is used. Accordingly, it is possible to provide a recording apparatus having a recording system with high accuracy and high reliability and high recording efficiency.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing apparatus of the light source device which can determine the relative position of a light emitting element and a lens with high precision, the light source device manufactured using this, and a recording device can be provided.

  If the light source device has a lens bonding structure as described above, it must be chucked so that the lens does not move during bonding. In this patent, for example, when the lens is completely fixed by the chuck means, stress is generated between the lens and the first lens support portion due to the shrinkage of the adhesive after the completion of bonding. This facilitates peeling of the adhesive. Further, when the chuck mechanism is released, a rapid reaction occurs in the lens, and there arises a problem that the positional accuracy of the lens is impaired. Therefore, when the chuck mechanism is movably provided, it is necessary to set conditions so that the lens positioning accuracy is not impaired.

  For this reason, the present applicant has created a technique for solving the above-mentioned problems and has already filed an application (see Japanese Patent Application No. 2003-304238, FIG. 1; configuration diagram). According to Japanese Patent Application No. 2003-304238 (light source device and method for manufacturing the light source device), the light source 1, the base 2 holding the light source 1, and the base 2 coaxially with the optical axis of the light source 1. And a lens support part 2-a is formed on the base 2, and the collimator lens or the condenser lens 3 is provided on the lens support part 2-a. In the method of adhering the collimator lens or condenser lens of the light source device fixedly adhered by the ultraviolet curable adhesive 4, the optical axis direction of the light source and the collimator lens or condenser lens is set in a horizontal direction, and the collimator The position adjustment of the lens 3 until the lens or the condenser lens is bonded is performed by the chuck means 5 for chucking the lens 3 and the monitor 6. It is. The chuck means 5 for chucking the lens 3 is configured so as to sandwich an unbonded portion of the side surface of the collimator lens or the condenser lens with two arms A and B, one of which is the arm (arm A). The collimator lens or the condenser lens is supported and fixed on one plane, and the other arm (arm B) is arranged so that the collimator lens or the condenser lens is placed in the optical axis direction of the collimator lens or the condenser lens. Since it is provided so as to be supported by the two formed ridgelines and pressurized in a retractable manner, it is possible to manufacture a light source device with high assembly accuracy, less assembly accuracy variation, and high assembly strength.

  In this way, the lens is supported by the two arms A and B, one of which is fixed by supporting the lens on one plane, and the other arm is supported by the ridgeline of the two lenses. It is provided to be pressurized so as to be retractable. Accordingly, the lens moves along the arm to which the lens is fixed, and the retractable arm is retracted by the movement of the lens, so that the lens can be accurately moved and the residual stress can be reduced even during the shrinkage of the adhesive. However, since the behavior of the two arms is different, the friction applied to the lens when the lens is moved during the contraction of the adhesive differs between the two arms, which may cause rotational stress on the lens. Concerned. FIG. 2 is a diagram for explaining the generation of stress due to the difference between the left and right forms of the lens chuck. For this reason, peeling may easily occur in the adhesive layer, which may cause a decrease in adhesive strength.

  The present applicant has applied for a technique for solving the above-mentioned problem as Japanese Patent Application No. 2004-127061 (recording device, light source device, and light source device manufacturing method). As in FIG. 1 (a), the light source device is a single light source represented by a light source, a base holding the light source, a collimator lens or a condensing lens arranged coaxially with the optical axis of the light source. Alternatively, a plurality of lenses or a lens array and a lens support part for supporting the lens are provided, and the lens is fixedly bonded onto the lens support part. In the method for adhering the lens of the light source device, the optical axis direction of the light source and the lens is set in a horizontal direction, and chucking means for chucking until the lens is adhered is composed of two arms. It is configured so as to sandwich an unbonded portion of the side surface (see FIG. 3; configuration diagram), and the two arms are provided to support the lens at one or more ridge lines or points, respectively, so as to be removably pressurized. The retraction amounts of the two arms are always substantially the same. Accordingly, it is possible to provide a method for manufacturing a light source device that has a high lens mounting accuracy, a small mounting accuracy variation, and a high mounting strength.

  Although the lens 3 is supported by two arms 5-a and 5-b, the shape of the two arms is bilaterally symmetric and always exhibits bilaterally symmetric behavior. It can be restricted only downward. Further, since the force applied to the lens 3 from the two arms is also symmetrical, the force in the rotational direction does not act on the lens 3, and the lens 3 moves straight down without rotating. Therefore, it is possible to suppress the stress in the rotational direction applied to the lens 3. However, when the above configuration is actually created, high processing accuracy is required to make the lens support portions of the two arms have the same shape. The actual amount of movement of the lens is a minute amount (0.1 mm or less), and processing accuracy on the order of smaller than that amount is required. Therefore, processing is difficult and cost is increased. Further, the amount of backlash of the crank mechanism used in this configuration is required to have the same processing accuracy as that of this, and there is a problem in assembly. Furthermore, since the lens holding force gradually decreases during the lens bonding process, the lens may tilt during the lens bonding.

  The present applicant has applied for a technique for solving the above-mentioned problem as Japanese Patent Application No. 2004-110415 (recording device, light source device, and light source device manufacturing method). This light source device is also represented by a light source, a base holding the light source, a collimator lens or a condensing lens arranged coaxially with the optical axis of the light source, as in FIG. 1 (a). One or a plurality of lenses or a lens array, and a lens support part for supporting the lens are provided, and the lens is fixedly bonded onto the lens support part. In the light source device, the chucking method for chucking the lens until the lens is bonded is used in the light source device. The chuck unit includes an arm unit for holding the first lens and a first arm unit for the lens. And an arm unit holding means that is movably held in the bonding direction (see FIG. 4; configuration diagram). Accordingly, it is possible to provide a manufacturing method of a light source device with high lens mounting accuracy, low mounting accuracy variation, prevention of lens tilting during mounting, and high mounting strength with an inexpensive configuration. .

  The two arms 5-1 -a and 5-1 -b that support the lens 3 are attached so as to firmly fix the lens 3, and the movement of the lens 3 due to the contraction of the adhesive 4 is absorbed. The arm unit itself is movably held by arm unit holding means 5-2-a. Accordingly, the lens support during the movement of the lens is firm, and the lens movement due to the shrinkage of the adhesive can be flexibly followed.

  By the way, these inventions are characterized in that there is one lens support portion where the lens and the base are bonded. This contributes to lens adhesion that does not impair strength and mounting accuracy because it has excellent reproducibility of follow-up to shrinkage of the adhesive, but on the other hand, absolute lens adhesion strength and adhesion There is a concern that the amount of movement of the lens will increase with respect to deformation due to environmental changes and changes over time of the agent, and lens adhesion accuracy will be impaired. The present invention has been made to eliminate these problems described above and solve them.

  That is, the present invention includes a light source, a base holding the light source, a single lens or a lens array represented by a collimator lens or a condensing lens arranged coaxially with the optical axis of the light source, The invention relates to an improvement of a light source device that includes a lens support portion for supporting the lens and is configured by fixing and bonding the lens on the lens support portion.

  In the present invention, a light source, a base holding the light source, a single or a plurality of lenses or a lens array represented by a collimator lens or a condensing lens arranged coaxially with the optical axis of the light source, A light source device comprising: a first lens support portion for supporting a lens; and the first lens support portion fixedly bonded to the lens on the first lens support portion. The second lens support portion is provided at a position symmetrical to the lens support portion.

[First Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 5A and 5B show the configuration of the first embodiment of the light source device according to the present invention. The semiconductor laser 1 as a light source is held by the base 2 so that the optical axis direction is a horizontal direction. Various light sources such as LEDs and incandescent lamps are conceivable, but semiconductor lasers are generally used as light source devices for recording devices, so here an example using a semiconductor laser is illustrated. Yes. It is desirable that the base 2 and the semiconductor laser 1 are accurately positioned and fixed. Therefore, a fitting hole (not shown) is provided in the base 2, and the semiconductor laser is accurately provided along the fitting hole. 1 is fitted.

  A lens 3 is disposed on the extension of the optical path of the semiconductor laser 1. In many cases, a collimator lens or a condensing lens is used as the lens 3. However, when collimation of the laser beam is required, the collimator lens condenses the laser beam when it is used as a minute spot. A light lens is used. Moreover, you may use the lens which has the effect of the condensing lens and the collimator lens with one sheet. In the case of this configuration, the effects of both the parallelism of the laser beam and the focusing of the laser beam can be obtained with a simple lens bonding configuration. Of course, both the collimator lens and the condensing lens may be provided separately, or a lens system in which a plurality of condensing lenses are combined may be used. In that case, the lens system may be united into a single lens barrel. FIG. 5 illustrates a case of a monocular condensing lens.

  In this case, the lens 3 must finally be accurately aligned and fixed with respect to the optical axis of the semiconductor laser. Therefore, the lens 3 is bonded to the first lens support portion 2-a and the second lens support portion 2-b with an adhesive 4 typified by an ultraviolet curable adhesive. The ultraviolet curable adhesive is an adhesive that cures when irradiated with ultraviolet rays, and ultraviolet rays are irradiated in the bonding step. In addition, about the adhesive agent used here, it is not restricted to an ultraviolet curable adhesive agent, A momentary adhesive agent, an epoxy-type adhesive agent, a general bond, etc. are not specifically limited. An adhesive method such as welding is also possible without using an adhesive. In this embodiment, a case will be described in which an ultraviolet curable adhesive that is most excellent in handleability and has a great effect in the present invention is used.

  The first lens support portion 2-a is provided with a clearance from the theoretically correct position of the lens 3. This clearance is an adjustment margin for adjusting the position of the lens 3 and is a space for injecting the ultraviolet curable adhesive 4. Therefore, if the clearance is too small, a sufficient adjustment margin cannot be secured, and if the clearance is too large, the thickness of the UV curable adhesive 4 increases and the shrinkage of the adhesive 4 increases. It is desirable that the value be set to about 0.1 to 0.3 mm.

  The position of the lens 3 is adjusted by chuck means for chucking the lens 3 and a monitor (see FIG. 6). FIG. 6 is a schematic diagram showing a lens position adjustment system. The lens 3 is held by the chuck means 5 before bonding, and the chuck means 5 and the base 2 can be relatively adjusted in the three axial directions of x, y, and z. Further, the remaining two rotation directions other than the rotation direction around the optical axis of the lens 3 can be adjusted. That is, a position adjusting mechanism with five degrees of freedom as shown in FIG. 7 is provided. Then, the semiconductor laser 1 is turned on, and the monitor 6 is installed so that the light passes through the lens 3 and enters the monitor 6. The monitor 6 has a function of monitoring the position of the beam and the shape of the beam spot. Therefore, it is possible to accurately position the lens by adjusting the lens position while observing on the monitor 6 so that the beam position and the shape of the beam spot (that is, adjustment of the focal position) are optimal. . It is further preferable to automate by providing a control system that can automatically adjust (correct) the position of the lens by performing image processing on the monitor 6.

  After the lens 3 is accurately positioned, the ultraviolet curable adhesive 4 is injected to adhere the lens 3. As described above, the adhesive 4 is an ultraviolet curable adhesive. Not as long as the. However, since the ultraviolet curable adhesive is completely cured by being irradiated with ultraviolet rays for about 1 minute, it is very convenient in the present invention. Compared to this, for example, in the case of an instant adhesive, it hardens immediately after injecting the adhesive, so it is difficult to inject the adhesive evenly and is not convenient. There is a concern about residual stress after bonding. Alternatively, in the case of an epoxy-based adhesive, at least one hour or more is required for curing (normally 24 hours), and the chuck means cannot be moved until the adhesive is cured. Bond-type adhesives also take time to cure, and there are concerns about adhesive strength and elasticity after bonding. As for welding, since metal or plastic is locally melted, it must be heated to a high temperature. Therefore, the occurrence of residual stress and thermal expansion / contraction must be concerned.

  In that respect, UV curable adhesives will not cure unless they are exposed to UV light, so even if you inject the adhesive before adjusting the lens position, it will not cure for a while, so you can spread the adhesive evenly and make adjustments more calmly. It can be carried out. And since it suffices to apply ultraviolet rays when the position is determined, it is possible to effectively shorten the bonding time. At this time, since the adhesive is evenly distributed, it is possible to prevent the occurrence of uneven stress when the adhesive is cured.

  Therefore, in the present embodiment, the ultraviolet curable adhesive is injected between the lens 3 and the first lens support portion 2-a. Normally, this gap is about 0.1 to 0.3 mm. As an injection method, the most common method is to inject the nozzle close to the gap. At this time, if there is an apparatus that can always keep the injection amount constant, variation in adhesion between lots can be reduced. In addition, there is also a method in which an adhesive 4 is attached to the tip of a needle-like material, and this is brought into contact with the gap between the lens 3 and the first lens support portion 2-a and injected by capillary action. There is also a technique of applying the lens 3 or the first lens support portion 2-a in advance. This is a technique that utilizes the properties of an adhesive that does not cure unless exposed to ultraviolet light.

  Next, the ultraviolet curable adhesive 4 is cured by applying ultraviolet rays. Since the lens 3 is cured after the position of the lens 3 is accurately guided, time-efficient bonding is possible. Ultraviolet rays may be applied from any direction as long as they can be applied to the adhesive 4 evenly. Of course, it may be simply irradiated from an ultraviolet light source as it is, but it is more energy efficient and preferable to irradiate a spot spot using an optical fiber or the like. In addition, the curing time can be shortened. Furthermore, when an optical fiber is used, it is possible to easily guide ultraviolet rays to complicated places. In the case of one lens, since the lens itself is transparent, irradiation can be performed from any direction from the side without the first lens support portion 2-a. It is desirable to irradiate from a place as close as possible to a portion where the adhesive 4 is present. When a lens array unitized by a lens barrel is bonded, an optical path of ultraviolet rays is secured by making a hole in the lens barrel or making the lens barrel transparent.

  The lens 3 is bonded and fixed at an accurate position by the above steps, but the ultraviolet curable adhesive 4 also has a feature that it shrinks when it is cured in the same manner as other adhesives. The problem here is that the position of the lens 3 gradually changes due to the shrinkage of the adhesive 4 in the bonding process. For example, when the lens 3 is completely fixed by the chuck means 5, the lens 3 is guided to a predetermined position, and then the bonding process is started. After the bonding is completed, the adhesive 3 is contracted to support the lens 3 and the first lens. Stress occurs between the portion 2-a. This facilitates the peeling of the adhesive as shown in FIG. Further, in a general chuck mechanism, when the lens 3 is separated from the lens 3, a sudden reaction occurs in the lens 3, which causes a problem that the position accuracy of the lens 3 is impaired.

  In order to deal with the above problem, the chuck means 5 for chucking the lens adopts the configuration proposed in the above-mentioned Japanese Patent Application Nos. 2003-304238, 2004-127061, and 2004-110415. ing. The respective configurations according to these proposed technologies are shown in FIGS. 1, 3, and 4 above. The description of the configuration will not be repeated here, but the points common to the three examples are that the chuck means restricts the lens operation only in the vertical direction and the shrinkage of the adhesive. As a result, the lens holding force applied to the lens by the chuck means becomes smaller as the lens moves.

  In the lens bonding process, since the movement of the lens 3 due to the shrinkage of the adhesive 4 is an unavoidable problem, how to limit the moving direction of the lens 3 so as not to impair the bonding strength is the biggest problem. In order to secure the positional accuracy of the lens 3 after bonding, the initial position of the lens 3 must be offset in anticipation of the contraction amount, but it is not preferable to make the offset condition complicated. Therefore, it is necessary to limit the moving direction of the lens position as much as possible. In the case of these examples, it is considered that the lens 3 basically moves downward when the adhesive 4 contracts, but it is not necessarily considered to move completely vertically downward, due to the density distribution or disturbance of the adhesive, It can be considered that it is slightly shifted from side to side. Therefore, by adopting such a configuration, the moving direction of the lens is limited to the vertical direction by eliminating the component in the horizontal direction from the moving direction of the lens. Since the movement amount at this time has a certain degree of reproducibility, if the movement amount is estimated and the lens position is adjusted at a position where the movement amount is corrected, precise lens adhesion becomes possible.

  At this time, it goes without saying that the approximate direction in which the adhesive 4 contracts and the direction in which the lens 3 can move in the chuck means 5 must coincide with each other. Otherwise, the stress generated after bonding will increase. Therefore, as long as the approximate direction in which the adhesive 4 contracts and the direction in which the lens can move in the chuck means 5 coincide with each other, these need not be limited to the vertical direction. However, by making these in the vertical direction, the influence of gravity is eliminated, and stress-free lens bonding is possible. Further, the light source 1 is held on the base so that the optical axis direction thereof is horizontal, and as a result, the optical axis of the lens 3 is also set in the horizontal direction. Can be prevented from changing.

  Further, when the lens bonding is completed, it is desirable that the lens holding force applied to the lens 3 from the chuck means 5 is as small as possible. This is because when the lens holding force is strong, there is a possibility that a strong stress is applied to the lens. In this case, when the chuck mechanism is released, a rapid reaction occurs in the lens 3 and the positional accuracy of the lens 3 is impaired. Because there is a fear. Therefore, in any of these examples, the lens holding force applied to the lens 3 from the chuck means 5 is reduced as the lens 3 moves due to the shrinkage of the adhesive 4. Regardless of which chucking means is used, a magnet is used as the easiest means for taking such a configuration.

  The most characteristic point of the present invention compared to the conventional invention is that the second lens support portion 2-b is provided (see FIG. 5). The problem when the lens is supported by only one first lens support portion as in the conventional example is that the adhesive strength is not sufficient, especially because the lens is cantilevered when an external force is applied. As shown in the explanatory diagram of FIG. 9, when the stress is concentrated on the part and the adhesive part is deformed due to environmental changes or changes with time, even a slight variation in the adhesive distribution occurs. If it is, the lens is cantilevered, so that the amount of movement of the lens becomes large and the accuracy is impaired. In order to solve these problems, the second lens support portion 2-b is provided in the present invention.

  The second lens support portion 2-b is provided at a position symmetrical to the first lens support portion with respect to the optical axis of the lens. It is clear that two lens support parts are more advantageous in terms of strength and the like than one, but the point that it was more advantageous to support at one place than at two places so far is that This is because, as described above, it is possible to cope with problems caused by shrinkage of the ultraviolet curable adhesive during bonding. However, when two lens support portions are simply provided, as shown in FIG. 10, peeling of the adhesive occurs due to the shrinkage of the ultraviolet curable adhesive during bonding. In addition, it is unlikely that reproducibility is seen in the behavior of the lens at this time, and it becomes difficult to obtain the accuracy of lens adhesion. From the above points, it is general to support the lens only by one (first) lens support portion.

  In the present invention, such a problem is addressed by using a member having a small rigidity in the radial direction of the lens 3 for the second lens support portion 2-b. FIG. 11 shows an action (behavior) of a leaf spring as the most general member. The leaf spring 2-b exhibits a spring property in a direction perpendicular to the surface thereof, and thus the rigidity is low. However, the leaf spring 2-b is buckled in the extending direction of the leaf spring, but the basic rigidity is perpendicular to the surface. Much higher than other directions. If a leaf spring member is used for the second lens support portion 2-b utilizing this characteristic, the contraction direction of the adhesive 4 is the radial direction of the lens 3 as shown in FIG. Is deformed following the contraction of the adhesive 4, and the lens 3 is tilted or rolled since the circumferential direction and the optical axis direction of the lens 3 are relatively rigid in the second lens support portion 2-b. It becomes possible to prevent.

  Of course, it goes without saying that the stress in the radial direction of the lens 3 of the deformed second lens support portion 2-b after the lens bonding must be sufficiently smaller than the stress at which the adhesive 4 peels off. Yes. Therefore, it is necessary to investigate in advance the relationship between the peeling force of the adhesive and the stress applied by the deformation of the second lens support portion 2-b with respect to the shrinkage amount of the adhesive. If the rigidity of the second lens support portion 2-b is too small, the rigidity of the lens 3 in the circumferential direction and the optical axis direction will be affected, so the rigidity must be set to an appropriate value. Needless to say.

  By adopting such a configuration, in this embodiment, since the lens can be bonded without hindering the shrinkage of the ultraviolet curable adhesive 4 due to the lens bonding, it is possible to bond the lens 3 with high strength and high accuracy. In addition, the lens 3 is supported at two locations, and the rigidity in the circumferential direction and the optical axis direction of the lens is maintained, so that the adhesive 4 can be deformed due to environmental changes and changes over time. Even with this, it becomes possible to maintain the bonding accuracy.

  However, in the above-described configuration, after the bonding is completed, the second lens support portion 2-b remains deformed, so that the internal stress is always applied. There is a concern that this may cause some problems. Therefore, as shown by (a) to (c) in FIG. 12, it is preferable to provide a distortion imparting member 7 for imparting distortion in the direction away from the lens 3 to the second lens support portion 2-b during bonding. is there. In the state of FIG. 12A, the second lens support portion 2-b and the lens 3 are bonded. As a result, the second lens support portion 2-b is distorted in the direction toward the lens 3 due to the hardening / shrinkage of the adhesive 4 (see FIG. 12B). When the distortion imparting member 7 is removed after the completion of bonding [see FIG. 12 (c)], the two distortions cancel each other, resulting in no distortion remaining in the second lens support portion 2-b, that is, the inside This means that no residual stress remains. First, the amount of distortion imparted to the second lens support portion 2-b by the strain imparting member 7 should be set so that the evaluation is repeated many times and finally no distortion remains in the second lens support portion 2-b. It goes without saying that it must be done.

  The material used for the second lens support portion 2-b is not necessarily limited to a metal leaf spring, and may be a resin or the like. Further, there is a method in which the rubber material 2-b-1 is used as a second lens support portion as shown in FIG. However, in consideration of thermal deformation, it is better to use the same material for the first lens support portion 2-a and the second lens support portion 2-b as much as possible. As a result, the difference in expansion coefficient between the two lens support portions 2-a and 2-b is eliminated, so that it is possible to suppress the displacement of the lens position due to a temperature change. Of course, there is no problem as long as materials having substantially the same coefficient of thermal expansion are used even if they are not the same material.

  Instead of reducing the rigidity in the radial direction of the lens 3 of the second lens support portion 2-b itself, a method of reducing the rigidity of the adhesive 4 that bonds the second lens support portion 2-b and the lens 3 is used. Even if used, the same effect can be expected. In this case, the adhesive 4 for bonding the second lens support portion 2-b and the lens 3 is not necessarily an ultraviolet curable adhesive, but the first lens support portion may be an ultraviolet curable adhesive. What is necessary is just to use a thing with small rigidity after hardening compared with the ultraviolet curable adhesive which adhere | attaches 2-a and the lens 3. FIG.

  Next, the shape of the first lens support portion 2-a will be described. The shape of the bonding surface of the first lens support portion 2-a is substantially bilaterally symmetric with respect to the plane formed by the vertical line passing through the center of the lens 3 and the optical axis of the lens 3. As this most general shape, there is an arc shape having a diameter slightly larger than the outer circumference of the lens 3, and FIG. 5 shows this case. The shape of the bonding surface of the first lens support portion 2-a is not a circular arc shape, provided that the condition of being substantially bilaterally symmetrical with respect to the plane formed by the vertical line passing through the center of the lens 3 and the optical axis of the lens 3 is satisfied. May have a shape as shown in FIG. 14 (V-shaped) or FIG. 15 (planar), and the same operation and effect can be obtained.

  Although the lens 3 is bonded to the first lens support portion 2-a by these bonding surfaces, as described above, the ultraviolet curable adhesive 4 contracts during the curing process. Therefore, the lens position also moves in the bonding process due to the influence. Therefore, in order to secure the positional accuracy of the lens 3 after bonding, the initial position of the lens 3 must be offset in anticipation of the contraction amount, but it is not preferable to make the offset condition complicated. Therefore, it is necessary to limit the moving direction of the lens position as much as possible. According to the above-described method, since the adhesive surface does not act in the optical axis direction, no contraction occurs in the optical axis direction. In the two directions orthogonal to the optical axis direction, the adhesive surface acts, so it is necessary to set an offset condition by moving the lens.

  In general, the amount of shrinkage of an ultraviolet curable adhesive is proportional to the thickness of the adhesive layer, so that the vertical line passing through the center of the lens and the optical axis of the lens, as shown in the explanatory diagram of FIG. If it is substantially symmetrical with respect to the plane formed, the contraction of the adhesive cancels out in the horizontal direction among the two directions orthogonal to the optical axis, and the movement amount of the lens 3 as a whole becomes close to zero. Therefore, the moving direction of the lens 3 due to the shrinkage of the ultraviolet curable adhesive is only the vertical direction of the two directions orthogonal to the optical axis. As a practical problem, the lens 3 is slightly displaced in the horizontal direction even in the above configuration due to the distribution of the density of the adhesive, disturbance, and the like. However, by using the chuck means as described above, the lens 3 The amount of deviation in the horizontal direction can be reduced as much as possible.

  Similarly, if the shape of the adhesive surface is substantially symmetrical with respect to the horizontal plane passing through the center of the lens 3, the contraction of the adhesive 4 cancels out in the vertical direction, and the movement amount of the lens 3 as a whole is zero. However, the calculation of conditions becomes complicated due to the influence of gravity.

  In the present embodiment (FIG. 5), the shape of the adhesive surface of the first lens support portion 2-a is an arc shape having a diameter slightly larger than the outer circumference of the lens 3, and the optical axis of the light source 1 and The case where it is formed in the base 2 so as to be concentric is shown. The advantage of this shape is that the thickness of the adhesive layer can be made uniform on the adhesive surface. In this way, uneven application and curing unevenness of the adhesive 4 can be prevented, and since a thin adhesive layer can be used as a whole, good results such as shortening the adhesive time and saving the amount of adhesive can be realized. Yes.

  The shape of the bonding surface of the first lens support portion 2-a is a semicircular arc or less. By doing so, the shrinkage direction of the ultraviolet curable adhesive 4 is only below the lens 3, and it is possible to reduce variations in the moving direction of the lens 3 due to the shrinkage of the adhesive 4.

  For the same reason, the shape of the second lens support portion 2-b under similar conditions is substantially symmetric with respect to a plane formed by the vertical line passing through the center of the lens 3 and the optical axis of the lens. However, in this case, it is formed in a planar shape instead of an arc shape. This is because if the lens is formed in an arc shape, the rigidity of the lens in the radial direction is increased, resulting in a shape contrary to the characteristics of the present invention.

  In the present embodiment, an ultraviolet curable adhesive is used as the adhesive 4. In order to cure the ultraviolet curable adhesive, the adhesive surface must be irradiated with ultraviolet rays. Usually, since the lens 3 is transparent, it is sufficient to irradiate ultraviolet rays from the side where the lens 3 is present. At this time, it is desirable that the irradiation direction of the ultraviolet rays be approximately bilaterally symmetric with respect to a plane formed by the vertical line passing through the center of the lens 3 and the optical axis of the lens 3. If the left and right are not symmetrical, the curing time of the adhesive 4 varies from side to side. As a result, there is a concern that the lens 3 may be displaced in the horizontal direction or stress on the bonding surface. Considering the above points, it is desirable to irradiate ultraviolet rays from directly above the lens 3 as the ultraviolet irradiation direction. This is because, when ultraviolet rays are irradiated from directly above, irradiation can be performed almost perpendicularly to the bonding surface, so that the energy efficiency is the best and bonding in a short time is possible.

  However, in the configuration of the present embodiment, the first lens support portion 2-a and the second lens support portion 2-b are opposed to each other with the lens 3 interposed therebetween, so that both lens support portions interfere with each other as they are, It is impossible to irradiate ultraviolet rays from vertically above the bonding surface. In order to solve this problem, the second lens support portion 2-b is detachable from the light source device base 2. First, the first lens support portion 2-a and the lens 3 are bonded together with the second lens support portion 2-b removed from the light source device base 2 (see FIG. 17; procedure explanatory diagram). During this operation, ultraviolet irradiation can be performed vertically above the bonding surface, so that efficient and stable bonding can be realized.

  After the bonding is completed, the second lens support portion 2-b is attached to the light source device base 2, and the second lens support portion 2-b and the lens 3 are bonded. For this bonding, it is not always necessary to use an ultraviolet curable adhesive, but when an ultraviolet curable adhesive is used, the irradiation direction of ultraviolet rays is relative to the plane formed by the vertical line passing through the center of the lens 3 and the optical axis of the lens 3. It is good to irradiate from the diagonal direction so that it may become substantially symmetrical. Since the second lens support portion 2-b is set to have low rigidity, the reference for obtaining the accuracy of lens adhesion is only the first lens support portion 2-a, so that the first lens support portion 2-a and the lens 3 are adhered. The procedure of going ahead and bonding under favorable conditions makes sense.

  Note that both the adhesion between the first lens support portion 2-a and the lens 3 and the adhesion between the second lens support portion 2-b and the lens 3 may be simultaneously adhered using the ultraviolet curable adhesive 4. By doing so, the bonding time can be shortened. In this case, it is preferable to irradiate with an oblique method so that the irradiation direction of ultraviolet rays is substantially bilaterally symmetric with respect to a plane formed by a vertical line passing through the center of the lens 3 and the optical axis of the lens 3. Even in this case, as described above, it is most desirable to perform ultraviolet irradiation from vertically above the bonding surface in terms of bonding efficiency and stable bonding. As a technique for realizing this, there is a technique of making a hole or making the first lens support part 2-a or the second lens support part 2-b transparent. In any case, ultraviolet irradiation can be facilitated, ultraviolet irradiation efficiency can be improved, and the energy of bonding can be reduced and the bonding time can be shortened.

  The description of the light source device and the method for manufacturing the light source device is as described above. However, the light source device manufactured with such a configuration is extremely useful because it has very high accuracy and secures adhesive strength. In addition, it is also possible to manufacture a so-called multi-beam light source device by providing a plurality of combinations of the semiconductor laser 1 and the lens 3 on one base 2 by the manufacturing method described so far. In this case, since the relative positional accuracy of each beam is ensured precisely, the light source device is efficient and more useful.

  These light source devices are powerful when used in a recording apparatus. Specific examples of the recording apparatus include a printing plate making machine, a printing plate block making machine, a printer using a photosensitive drum, a copying machine, and a fax machine. In recent years, these recording apparatuses are required to record at high resolution, high image quality, and high speed, and the light source device manufactured by the manufacturing method of the present invention is guaranteed high accuracy. It meets your needs. Further, when implemented as a multi-beam light source device, a recording device using this can obtain a wide image at high speed.

[Other Embodiments]
The present invention is not limited to the above-described embodiment, and can of course be implemented as other modified forms. Hereinafter, other embodiments of the present invention will be described. Since the overall configuration has already been described in detail in the previous embodiment, a specific example, an example of a manufacturing process, and the like are simply listed for each item of the component. The light source device of the present invention can be configured by selecting and employing an arbitrary item for each item corresponding to the previous embodiment.

[A. Light Source] In the present invention, the light source 1 can be as follows.
A-1) Semiconductor laser
A-2) LED
A-3) Incandescent light

[B. Lens] In the present invention, the following lens 3 can be used.
B-1) Collimator lens alone
B-2) Condensing lens alone
B-3) A single lens that combines the functions of a collimator lens and a condenser lens
B-4) Composite lens of collimator lens and condenser lens
B-5) Multiple condenser lenses

[C. (How to assemble multiple lenses)
C-1) Individually mounted on the lens support section Effect: Easy to irradiate UV rays on the bonded section
C-2) Unitization of multiple lenses using a lens barrel. At this time, it is necessary to make a hole for light to pass through the lens barrel or make it transparent. Effect: Easy to handle

[D. Adhesive (or adhesive means)]
D-1) UV curable adhesive Effect: Adhesion timing can be controlled freely.
D-2) Instant adhesive
D-3) Epoxy adhesive
D-4) General bond
D-5) Welding

[E. Beam position monitoring and adjustment)
E-1) Adjust manually while observing beam position and spot shape on monitor
E-2) Provide a control system that automatically adjusts the lens position by processing the beam position and spot shape captured by the monitor. Effect: The lens position adjustment can be automated.

[F. (Adhesive supply method)
F-1) Use nozzle
F-2) Use a device that uses a nozzle to make the injection volume constant. Effect: Prevents adhesive dispersion.
F-3) Adhesive is put on the tip of needle-shaped object and supplied by capillary action
F-4) Apply to lens and first lens support in advance

[G. (Ultraviolet irradiation method)
G-1) Direct irradiation from light source for curing
G-2) Irradiation locally via an optical fiber Effect: The ultraviolet light can be used effectively, and the ultraviolet light can be easily guided to the complicated shape.

[H. Configuration of chuck means]
H-1) Example of Japanese Patent Application No. 2003-304238 (see FIG. 1)
H-2) Example of Japanese Patent Application No. 2004-127061 (see FIG. 3)
H-3) Example of Japanese Patent Application No. 2004-110415 (see FIG. 4)

[I. Material of second lens support section]
I-1) Metal leaf spring
I-2) Resin leaf spring
I-3) Rubber material (Fig. 13)

[J. Shape of first lens support section]
J-1) Symmetrical lens is a coaxial arc (Fig. 5)
Effect: Since the thickness of the adhesive layer can be made uniform, uneven adhesion can be prevented and the lens can be adhered in a short time.
J-2) Symmetrical V-shape (Fig. 14)
J-3) Planar shape (Fig. 15)

[K. Lens adhesion order)
K-1) First lens support and lens are bonded first
K-2) Bonding the first lens support part and the lens and bonding the second lens support part and the lens at the same time

  Each light source device described so far can be preferably applied to a recording apparatus including the light source device. In recent years, high-resolution and high-speed information recording is required for a recording apparatus, but the light source device according to the present invention can be suitably applied to a recording apparatus because the accuracy of the beam irradiation position is high. Furthermore, when the multi-beam light source device according to the present invention is applied to a recording apparatus, a wide image can be obtained at high speed. Specific examples of the recording apparatus include a printing plate making machine, a printing plate underlay preparation machine, a CTP printing machine, a printer using a photosensitive drum, a copying machine, and a FAX.

(a), (b) is a figure which shows the structural example of the chuck means which is a light source device and its manufacturing apparatus. It is a figure explaining generation | occurrence | production of the stress by the difference in the left and right form of a lens chuck. It is a figure which shows another structural example of the chuck | zipper means which concerns on a light source device. It is a figure which shows another structural example of the chuck | zipper means which concerns on a light source device. (a), (b) is a figure which shows the structural example of the light source device which concerns on this invention. It is the schematic which shows a lens position adjustment system. It is a figure which shows the position adjustment mechanism of 5 degrees of freedom. It is a figure which shows the malfunction which generate | occur | produces by shrinkage | contraction of an adhesive agent. It is a figure which shows the behavior of the lens accompanying shrinkage | contraction of an adhesive agent. It is a figure which shows the malfunction which generate | occur | produces by shrinkage | contraction of an adhesive agent in two lens support parts. It is a figure which shows a mode that a 2nd lens support part deform | transforms with hardening of an adhesive agent. (a)-(c) is a figure which shows the other structural example of the principal part of a light source device, and its effect | action. It is sectional drawing which shows an example of a structure of a 2nd lens support part. It is a figure which shows the 1st lens support part which made the V-shaped part the lens adhere | attached. It is a figure which shows the 1st lens support part which made the part to which a lens adhere | attaches a plane. It is a figure which shows a mode that a lens moves with hardening of an adhesive agent. It is explanatory drawing of the example of a lens assembly | attachment procedure in embodiment.

Explanation of symbols

1 Light source (light emitting element)
2 Base 2-a 1st lens support part 2-b 2nd lens support part 2-b-1 Rubber material 3 Lens 4 Adhesive 5 Chuck means 6 Monitor 7 Strain imparting member 8 Optical fiber

Claims (27)

A light source, a base holding the light source, one or a plurality of lenses arranged coaxially with the optical axis of the light source, and a first lens support portion for supporting the lens, In the light source device configured by fixing and adhering the lens on the lens support portion,
Providing a second lens support for supporting the lens at a position symmetrical to the first lens support with respect to the optical axis of the lens ;
The light source device according to claim 1, wherein the second lens support portion has a smaller rigidity in the radial direction of the lens than the first lens support portion . A light source, a base holding the light source, one or a plurality of lenses arranged coaxially with the optical axis of the light source, and a first lens support portion for supporting the lens, In the light source device configured by fixing and adhering the lens on the lens support portion,
Providing a second lens support for supporting the lens at a position symmetrical to the first lens support with respect to the optical axis of the lens ;
The adhesive for adhering the second lens support part and the lens is less rigid after curing than the adhesive for adhering the first lens support part and the lens. A light source device. 3. The light source device according to claim 1, wherein the first lens support portion and the second lens support portion are made of the same material or have substantially the same coefficient of thermal expansion. The light source device according to any one of claims 1 to 3 at the time of bonding of the lens is the optical axis direction of the light source and the lens is characterized in that it is manufactured is set in a horizontal direction. 5. The light source device according to claim 4 , wherein a shape of an adhesive surface of the first lens support portion is substantially symmetrical with respect to a vertical surface including an optical axis of the lens. The shape of the adhesive surface of the first lens support portion is an arc shape having a diameter slightly larger than the outer circumference circle of the lens, and is formed on the base so as to be concentric with the optical axis of the light source. The light source device according to claim 5 , wherein the light source device is a light source device. The light source device according to claim 6 , wherein a shape of the bonding surface of the first lens support portion is a semicircular arc or less. 5. The light source device according to claim 4 , wherein the shape of the bonding surface of the second lens support portion is substantially symmetrical with respect to a vertical plane including the optical axis of the lens. The light source device according to claim 8 , wherein the bonding surface of the second lens support portion is formed to be a flat surface in the horizontal direction. A manufacturing method for manufacturing the light source device according to any one of claims 4 to 9 ,
A manufacturing method of a light source device, wherein the lens and the first lens support portion are fixedly bonded with an ultraviolet curable adhesive. The method of manufacturing a light source device according to claim 10 , wherein the lens and the first lens support portion are bonded before the lens and the second lens support portion are bonded. The method of manufacturing a light source device according to claim 11 , wherein the second lens support portion itself is mounted on the base after the adhesion between the lens and the first lens support portion is finished. The method of manufacturing a light source device according to claim 12 , wherein the lens and the second lens support portion are fixedly bonded to each other with an ultraviolet curable adhesive. A manufacturing method for manufacturing the light source device according to any one of claims 4 to 9 ,
A method of manufacturing a light source device, wherein the lens and the first lens support portion, and the lens and the second lens support portion are simultaneously fixed and bonded with an ultraviolet curable adhesive. The method of manufacturing a light source device according to claim 10 , wherein the irradiation of ultraviolet rays is made substantially symmetrical with respect to a vertical plane including an optical axis of the lens. The method of manufacturing a light source device according to claim 15 , wherein the first lens support portion is provided with a hole. The method of manufacturing a light source device according to claim 15 , wherein the first lens support portion is transparent. The method of manufacturing a light source device according to claim 15 , wherein the second lens support portion is provided with a hole. The method of manufacturing a light source device according to claim 15 , wherein the second lens support portion is transparent. When the lens and the second lens support are fixed and bonded, the second lens support is distorted in advance in a direction away from the radial center of the lens, and the distortion is removed after the bonding is completed. The method for manufacturing a light source device according to any one of claims 10 to 19 . 21. The apparatus according to claim 10 , further comprising chuck means for holding the lens when the lens is bonded, wherein the chuck means restricts the operating direction of the lens to a vertical direction only. 2. A method for manufacturing the light source device according to item 1. The lens holding force of the chucking unit is decreased as the lens moves during the bonding with respect to an initial lens position where the lens is set by the chucking unit. A method for manufacturing the light source device according to claim 21 . 23. The method of manufacturing a light source device according to claim 22 , wherein the chuck means includes a position adjustment mechanism having five degrees of freedom excluding at least a rotation direction around the optical axis of the lens. 23. The position adjustment mechanism according to claim 22 , wherein the base is set to a position adjustment mechanism having a degree of freedom of 5 except for at least a rotation direction around the optical axis of the lens relative to the chuck means. Manufacturing method of light source device. To one of the base on the light source device according to any one of claims 1 to 9, characterized by providing a plurality of combinations of the light source and the lens. The method for manufacturing a light source device according to any one of claims 10 to 24 , wherein a plurality of combinations of the light source and the lens are provided on one base. A light source device, or a recording apparatus which comprises using a light source device manufactured by the manufacturing method of the light source apparatus according to claim 10 to 26 according to claim 1-9.

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