JP2012142102A - Light source support member, and light source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source support member capable of fixing a light source in high accuracy and downsizing, and to provide a light source device.SOLUTION: The light source support member has: a light source insertion hole (31) in which a light source (10) or a light source unit (20) having a light source is inserted; and a screw insertion hole (33) which is arranged in a row with the light source insertion hole (31) and into which a screw (50) is inserted, wherein the light source support member (30) is fixed to a base member of the light source device by the screw (50). The light source insertion hole (31) has: an insertion-engagement part (311) with which the light source (10) or the light source unit (20) is engaged; and an extension part (315) which is installed between the insertion-engagement part (311) and the screw insertion hole (33).

Description

  The present invention relates to a light source support member that supports a light source of a light source device.

  In recent years, a light source device equipped with a semiconductor light emitting device such as a semiconductor laser (LD: Laser Diode) or a light emitting diode (LED: Light Emitting Diode) as a light source has been used for a light source for writing / reading of an optical disk device or various illuminations. ing. In such a light source device, an optical component such as a lens or a diffusion plate is usually installed in front of the light source, and optical characteristics such as an optical axis, beam parallelism, and light distribution are controlled. Therefore, in such a light source device, it is a very important design element to accurately adjust the relative position of the light source and the optical component and to maintain the adjusted position stably.

  For example, the light source device described in Patent Document 1 (particularly FIGS. 16 to 19) is provided with a base having a fitting hole for press-fitting a plurality of semiconductor lasers, and provided on the front surface of each semiconductor laser fixed to the base. A collimator lens, an optical element for beam synthesis, and a case attached to the base, the base having a central light source portion having the fitting hole, and both sides having screw holes for attaching the case. The fixed portion is connected with a narrow portion having low rigidity. And it is described that according to such a light source device, the deformation | transformation of the base by a temperature change can be suppressed small and a beam pitch can be maintained with high precision.

JP 11-154773 A

  However, as in the light source device described in Patent Document 1, if the distance between the light source part of the base and the fixing part is increased, the stress applied to the semiconductor laser due to the deformation of the base can be reduced. The dimensions of the base and the entire device are increased.

  Therefore, the present invention has been made in view of such circumstances, and an object thereof is to provide a light source support member and a light source device that can fix a light source with high accuracy and can be miniaturized.

  In order to solve the above-mentioned problems, a light source support member according to the present invention includes a light source insertion hole into which a light source or a light source unit having a light source is inserted, and a screw insertion hole in which a screw is inserted in parallel with the light source insertion hole. A light source support member fixed to the base member of the light source device by the screw, wherein the light source insertion hole includes a fitting portion into which the light source or the light source unit is fitted, the fitting portion and the And an extending portion provided between the screw insertion hole.

  The light source device according to the present invention includes a light source, a light source insertion hole into which the light source or a light source unit having the light source is inserted, and a screw insertion hole in which a screw is inserted in parallel with the light source insertion hole. A light source support member, and a base member to which the light source support member is fixed by the screw. The light source insertion hole includes a fitting portion into which the light source or the light source unit is fitted, and the fitting portion and the And an extending portion provided between the screw insertion hole.

  According to the present invention, even if the screw insertion hole is provided close to the light source insertion hole into which the light source or the light source unit having the light source is inserted, the stress applied to the light source insertion hole by tightening the screw can be reduced. Can be fixed with high accuracy, and a light source support member and a light source device that can be miniaturized can be provided.

It is the schematic rear view (a) of the light source device which concerns on one embodiment of this invention, and the schematic sectional drawing (b) in the AA cross section. It is the schematic rear view (a) of the light source support member which concerns on one embodiment of this invention, and the schematic sectional drawing (b) in the BB cross section. It is a schematic rear view (a) and (b) explaining the stress applied to the light source support member by tightening the screw. It is a schematic rear view (a)-(c) which shows another example of the light source support member which concerns on one embodiment of this invention.

  Hereinafter, embodiments of the invention will be described with reference to the drawings as appropriate. However, the light source support member and the light source device described below are for embodying the technical idea of the present invention, and the present invention is not limited to the following. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the components described below are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation.

<Embodiment 1>
1A and 1B are schematic views of a light source device according to Embodiment 1, FIG. 1A is a schematic rear view thereof, and FIG. 1B is a cross-sectional view taken along line AA in FIG. It is a schematic sectional drawing which shows. The light source device 100 shown in FIG. 1 mainly includes a light source unit 20 having a light source 10, a light source support member 30 that supports the light source unit, a base member 40 to which the light source support member is fixed by a screw 50, It is comprised by.

  The light source unit 20 mainly includes a light source holding member 21 that holds the light source 10, an optical component holding member 22 that holds the optical component 15 to which light emitted from the light source 10 is incident, and the light source holding member 21 and the optical component holding unit. And a connecting member 23 for connecting the member 22. More specifically, the light source 10 is a semiconductor laser device in which a semiconductor laser element is mounted on a stem, and the light source holding member 21 is an LD holder that holds the semiconductor laser device. The optical component 15 is a collimator lens that converts the emitted light of the semiconductor laser element into substantially parallel light, and the optical component holding member 22 is a lens holder that holds the collimator lens. The connecting member 23 is a cylindrical (annular) member, and the relative position between the semiconductor laser device 10 and the collimator lens 15 is adjusted, the lens holder 22 is fitted and held, and the LD holder 21 is joined. Yes.

  2 is a schematic view of the light source support member according to Embodiment 1, FIG. 2 (a) is a schematic rear view thereof, and FIG. 2 (b) is a cross-sectional view taken along line BB in FIG. 2 (a). It is a schematic sectional drawing which shows a cross section. As shown in FIGS. 1 and 2, the light source support member 30 has a light source insertion hole 31 into which the light source unit 20 is inserted, and a screw insertion hole 33 in which the screw 50 is inserted in parallel with the light source insertion hole. is doing. The base member 40 has a screw hole (female screw) into which the screw 50 is screwed. The light source support member 30 is fixed to the base member 40 by a screw 50 inserted into the screw insertion hole 33 so that the light source unit 20 is inserted into the light source insertion hole 31 to support the unit.

  The light source insertion hole 31 of the light source support member has a fitting portion 311 into which the light source unit 20 is fitted, and an extending portion 315 provided between the fitting portion 311 and the screw insertion hole 33. . The extension portion 315 suppresses the transmission of stress to the fitting portion 311 due to the tightening of the screw 50, and the stress applied to the light source unit 20 can be reduced. Therefore, even if the screw insertion hole 33 is provided close to the light source insertion hole 31 in which the light source unit 20 is inserted and supported, the light source 10 can be fixed with high accuracy. The light source device can be reduced in size. The “parallel arrangement” in this specification is not limited to the case where the light source insertion hole 31 and the screw insertion hole 33 are provided apart from each other, but the screw insertion hole 33 is provided continuously with the light source insertion hole 31. It shall apply even if

  Hereinafter, the mode of each hole of the light source support member 30 will be described in detail. Note that the optical axis of the light source 10 is the z axis, and two axes perpendicular to each other in the plane perpendicular to the optical axis (in the xy plane) are the x axis and the y axis. Here, the x-axis direction is the direction in which the light source insertion hole 31 and the screw insertion hole 33 are juxtaposed in the rear view of the light source support member 30, that is, the xy plan view, more specifically, the fitting portion 311 and the screw insertion hole 33. The direction parallel to the shortest straight line connecting In particular, in a rear view of the light source support member 30, a form in which the x-axis direction is parallel to a straight line connecting the centers of the fitting portion 311 and the screw insertion hole 33 is preferable. In addition, the shape of each hole shown below shall be in the rear view of the light source support member 30. FIG. Moreover, since the fitting part 311 and the extension part 315 of the light source insertion hole 31 are provided continuously, the shape of the fitting part 311 and the extension part 315 shall be assumed from the outline. The same applies to the shape of the screw insertion hole 33 when it is continuous with the extended portion 315.

  FIGS. 3A and 3B are schematic rear views for explaining the stress applied to the light source support member by tightening the screws. First, FIG. 3A simply shows the case of the light source support member 30 in which the substantially circular screw insertion hole 33 is provided close to the substantially circular light source insertion hole 31. That is, the light source insertion hole 31 is not provided with the extending portion 315 and is configured only by the fitting portion 311. As shown in the drawing, when the screw 50 is inserted into the screw insertion hole 33 and tightened and the light source support member 30 is fastened to the base member 40, the light source support member 30 is stressed by the pressing force of the seat surface of the screw 50. This stress is transmitted to the light source support member 30 radially around the screw 50 and gradually relaxed as the distance from the screw 50 increases, but the center between the light source insertion hole 31 (fitting portion 311) and the screw insertion hole 33. When the distance d is short, it extends to the light source insertion hole 31, and in some cases, the light source insertion hole 31 is deformed. In particular, this stress is concentrated on a portion of the light source insertion hole 31 close to the screw 50 (region surrounded by a dotted line in the figure: stress concentration region 39). When stress is applied to the light source insertion hole 31 in this manner, the light source unit 20 inserted and supported in the light source insertion hole 31 is also stressed, and there is a possibility that the optical characteristics of the apparatus, such as optical axis misalignment, are deteriorated.

  Next, FIG.3 (b) shows the case where the extension part 315 shown in FIG. 2 is added to the light source insertion hole 31 of the light source support member 30 of the example shown to Fig.3 (a). In this case, when the screw 50 inserted into the screw insertion hole 33 is tightened, the stress is transmitted radially from the light source support member 30 around the screw 50, but is concentrated on a portion of the extending portion 315 near the screw 50. Therefore, the stress can be prevented from being transmitted to the fitting portion 311. That is, due to the presence of the extending portion 315, the stress concentration region 39 is positioned away from the fitting portion 311 and the light source unit 20 fitted to the fitting portion. Thereby, the stress applied to the fitting portion 311 due to the tightening of the screw 50 can be reduced, and the light source unit 20 can be fixed with high accuracy.

  4A to 4C are schematic rear views showing another example of the light source support member of the first embodiment. First, in the light source support member 30 in the example shown in FIG. 4A, the extending portion 315 is provided continuously to the screw insertion hole 33. The light source support member 30 in the example shown in FIGS. In this way, by providing the extended portion 315 continuously to the screw insertion hole 33, the stress transmitted from the screw insertion hole 33 toward the fitting portion 311 is diffused in the y-axis direction, and the fitting portion 311 is thus diffused. Can be reduced. In addition, the extending portion 315 is preferably provided so as to include at least a part of the shortest straight line connecting the fitting portion 311 and the screw insertion hole 33 in the rear view of the light source support member 30. More preferably, it is provided continuously with the screw insertion hole 33 so as to include it. Since the stress due to the tightening of the screw 50 is greatly applied to a portion near the screw 50 of the fitting portion 311, the extension portion 315 is provided so as to cut out the portion, so that the stress applied to the fitting portion 311 is effectively reduced. Can be reduced. Further, in the light source support member 30 of the example shown in FIG. 4A, the diameter of the extending portion 315 in the y-axis direction is substantially constant in the x-axis direction and substantially the same as that of the screw insertion hole 33. A center line parallel to the x-axis of the portion 315 passes through the center of the screw insertion hole 33. With the extended portion 315 having such a configuration, the screw insertion hole 33 and the extended portion 315 can be continuously drilled by a milling cutter, and can be easily formed. Further, it is possible to finely adjust the fixed position of the light source support member 30 in the x-axis direction.

  Next, in the light source support member 30 of the example shown in FIG. 4B, the extending portion 315 has a tapered diameter-enlarged portion 317 that becomes larger as the diameter in the y-axis direction approaches the fitting portion 311. Have. Thereby, compared with the case where the diameter of the above-mentioned y-axis direction is substantially constant, the stress concerning the fitting part 311 can be reduced more. The tapered diameter-enlarged portion 317 can be formed on a part or all of the extended portion 315, and the change in the diameter in the y-axis direction may be either linear or curved. The diameter of the extending portion 315 in the y-axis direction may be substantially constant in the x-axis direction, but may be changed in this way. In particular, the extended portion 315 preferably has a maximum diameter L in the y-axis direction that is greater than or equal to D of the screw insertion hole 33. Thereby, since the stress transmitted from the screw insertion hole 33 toward the fitting portion 311 is easily blocked by the extending portion 315, it is easy to suppress the stress from being transmitted to the fitting portion 311.

  As shown in FIG. 2, the extending portion 315 preferably has a stepped diameter-enlarged portion 316 whose diameter in the y-axis direction increases stepwise (step shape) toward the fitting portion 311. . Since the side surface of the hole extending substantially parallel to the y-axis direction of the step-like enlarged diameter portion 316 can easily block the stress transmitted from the screw insertion hole 33 toward the fitting portion 311, the stress on the fitting portion 311 is stressed. It is easy to suppress the transmission. Here, the “stepped shape” includes the case of a single step change as shown in FIG. Furthermore, it is preferable that the step-like enlarged diameter portion 316 or the tapered enlarged diameter portion 317 is provided in close contact with the fitting portion 311. Thereby, even if these enlarged diameter parts 316 and 317 are provided, the diameter of the extending part 315 in the x-axis direction can be reduced, so that transmission of stress to the fitting part 311 can be easily suppressed, and the fitting part The screw insertion hole 33 is provided close to 311 so that the light source support member 30 can be easily downsized. In addition, it is more effective that these enlarged diameter portions 316 and 317 are located outside the seating surface of the screw 50. In addition, the extending portion 315 may include both the step-like enlarged diameter portion 316 and the tapered enlarged diameter portion 317.

  Further, like the light source support member 30 in the example illustrated in FIG. 4C, the extending portion 315 may be provided apart from the screw insertion hole 33. With this configuration, the contact area between the light source support member 30 and the seating surface of the screw 50 can be easily increased, and the fastening of the light source support member 30 and the base member 40 by the screw 50 can be easily stabilized.

  The extending portion 315 is provided as a through hole penetrating in the z-axis direction. The diameter of the extended portion 315 is preferably substantially constant in the z-axis direction, but may be changed to a stepped shape or a tapered shape. The extending portion 315 has a shape that is short in the x-axis direction and long in the y-axis direction, so that the fitting portion 311 and the screw insertion hole 33 are placed close to each other so that the light source support member 30 can be easily downsized and the screw 50 can be tightened. It is easy to suppress the stress due to the transmission to the fitting portion 311. For this reason, the extending portion 315 has a rectangular shape or linear shape that is long in the y-axis direction (corners and ends may be rounded due to processing), an elliptical shape, or a combination thereof (for example, approximately L-shape, substantially T-shape rotated by 90 °, cross shape, etc.) are preferable.

  The fitting portion 311 is provided as a through-hole penetrating in the z-axis direction or a concave portion dug in the z-axis direction, and the shape thereof is along the outer shape of the light source unit 20 for fitting with the light source unit 20. Preferably it is. In particular, in order to obtain a smooth fitting, the fitting portion 311 is preferably substantially circular. Note that the fitting portion 311 may have a protrusion 312 as shown in FIG. 2 or the like in order to position and weld the light source unit 20 in contact.

  The screw insertion hole 33 is preferably provided as a through hole penetrating in the z-axis direction, and is preferably substantially circular so that the pressing force by the seating surface of the screw 50 is applied substantially evenly around the screw insertion hole 33. Further, the screw insertion hole 33 may be a long hole extending in the y-axis direction having a margin for adjusting the fixed position in the y-axis direction, for example, a so-called small hole as shown in FIG. The screw insertion hole 33 may be formed in the recess as shown in FIG. 4B in order to reduce the protruding amount of the head of the screw 50. In consideration of the stress applied to the fitting portion 311, it is preferable to use a screw 50 having a size equal to or smaller than that of the light source unit 20, and the maximum diameter of the screw insertion hole 33 is smaller than that of the fitting portion 311. It is preferable. The center distance d between the fitting portion 311 and the screw insertion hole 33 is preferably 6.5 mm or more and 9.0 mm or less, more preferably 6.5 mm or more and 7.0 mm or less, for example, when an M2 screw is used. And If it is this range, the extension part 315 will show an effect favorably and it will be easy to aim at size reduction of an apparatus, ensuring the space of the electric power feeding cable connected to the light source 10.

  The number of screw insertion holes 33 may be one, but in order to stably fix the light source support member 30 to the base member 40, a plurality of screw insertion holes 33 are provided and are arranged substantially symmetrically with respect to the fitting portion 311. Preferably it is. Furthermore, it is preferable that a plurality of extending portions 315 are provided corresponding to the respective screw insertion holes 33. The “symmetry” means point symmetry (rotational symmetry) with respect to the center of the fitting portion 311 and line symmetry with respect to a straight line passing through the center of the fitting portion 311 in the rear view of the light source support member 30. Shall be included.

  In the light source device 100 as described above, as shown in FIG. 1A, the light source support member 30 fits and supports the light source unit 20 in the fitting portion 311 and is inserted into the screw insertion hole 33. In this state, the extended portion 315 becomes a gap, and a part of the light source unit 20 is exposed in the gap. The gap formed by the extended portion 315 functions like a vent and can improve the heat dissipation of the light source unit 20.

  The case where the light source support member 30 supports the light source unit 20 has been described above. However, the present invention is not limited to this, and the light source support member 30 fits the light source 10 to the fitting portion 311 and directly supports the light source 10. Also good. Further, the light source unit 20 may include the light source 10 and its holding member 21 without including the optical component 15 and its holding member 22.

  Hereafter, each component of the light source device of this invention is explained in full detail.

(light source)
The light source 10 uses a semiconductor light-emitting element such as an LD or LED, or a light-emitting device in which an organic EL (Electro-Luminescence) element is mounted on a stem, a lead frame, or a package base, or a lamp light source such as a halogen lamp. Can do. In particular, a light-emitting element using a nitride semiconductor capable of emitting ultraviolet light or short-wavelength visible light is a light source suitable for a high-precision and high-resolution optical system, but in order to realize such high performance. Since high-precision optical adjustment is required and the fixing accuracy is important, the structure of the light source device of the present invention is particularly effective.

(Light source holding member)
Various holders can be used for the light source holding member 21. The light source holding member 21 can be configured by using a clad material, for example, a steel material clad with an iron material, in addition to stainless steel, from the viewpoint of heat dissipation of the light source, mechanical strength, assembly accuracy, and the like. The light source 10 is preferably fixed to the light source holding member 21 by providing a hole for fitting the light source 10 in the light source holding member 21 and inserting the light source 10 into the hole to perform laser welding. In addition, you may fix by screwing, press-fit, or application | coating of an adhesive agent.

(Optical parts)
The optical component 15 can be an optical element such as a lens, a mirror, a prism, an optical filter, a diffusion plate, an optical crystal such as a laser rod or a nonlinear optical crystal for wavelength conversion, or an optical fiber. In particular, when the optical component 15 is a collimator lens having a high numerical aperture (NA), for example, 0.4 ≦ NA, the positional accuracy in the optical axis direction of the lens greatly affects the accuracy of the beam parallelism, and high-accuracy position adjustment is performed. In addition, since the high fixing accuracy is required, the structure of the light source device of the present invention is particularly effective.

(Optical component holding member)
Various holders can be used for the optical component holding member 22. The optical component holding member 22 is a cylindrical body having the optical axis of the optical component 15 as a central axis, holds the optical component 15 therein, and allows incident light to the optical component 15 to pass through in the optical axis direction as it is. However, it is preferable for downsizing of the apparatus. Moreover, it is preferable that the cross-sectional shape of the outer surface of the optical component holding member 22 is substantially circular so that the optical member holding member 22 can be fitted into the connecting member 23 and can be smoothly adjusted in the optical axis direction. Furthermore, the optical component holding member 22 preferably protrudes from the connecting member 23 in order to temporarily support the tip portion and adjust the position in the optical axis direction. The optical component 15 is fixed to the optical component holding member 22 by providing a projection for positioning the optical component 15 on the inner surface thereof, bringing the optical component 15 into contact with the projection, and applying an adhesive. be able to.

(Connecting member)
The connecting member 23 is preferably fitted with the optical component holding member 22 in the optical axis direction, and is preferably a tubular or annular member such as a sleeve. Further, the shape of the connecting member 23 is preferably a substantially circular inner surface for fitting with the optical component holding member 22 as described above, and a cylindrical shape whose outer surface is also substantially circular for through welding. Is preferred. Further, a structure in which the optical component holding member 22 is fitted into the connecting member 23 is preferable for downsizing the apparatus, but the structure is not limited to this, and a structure in which the connecting member 23 is fitted into the optical component holding member 22 may be used. The connecting member 23 can be omitted when the light source holding member 21 and the optical component holding member 22 are integrated as a single member or connected with a screw or the like.

(Light source support member)
The shape of the light source support member 30 can be formed in a plate shape or a block shape, and is preferably a plate shape for miniaturization of the apparatus. Further, for example, a portion having a step such as a portion where the light source insertion hole 31 is provided may be thicker than a portion where the screw insertion hole 33 is provided. The light source 10 or the light source unit 20 may be fixed to the light source support member 30 by screwing, press-fitting, or application of an adhesive in addition to laser welding.

  As described above, the optical component holding member 22, the connecting member 23, and the light source support member 30 are preferably made of a material that can be laser-welded. For example, stainless steel (austenitic, ferritic, martensitic), steel materials ( Carbon steel for machine structure, rolled steel for general structure), super invar, kovar, etc. can be used, and super invar, kovar, etc. are particularly preferable in terms of temperature dependency. Stainless steel, which has excellent weldability and corrosion resistance and is relatively inexpensive, is also suitable. Moreover, it is preferable that the part which carries out laser welding of these members is made into the thickness which can be penetrated, Preferably it is 0.30 mm or less, More preferably, it shall be 0.25 mm or less.

(Base member)
The base member 40 is a member to which the light source support member 30 is fixed. The base member 40 may have various shapes, and examples include a box shape, a cylindrical shape, a block shape, an L shape, a T shape, a plate shape, and the like. As the base member, stainless steel (austenite, ferrite, martensite), steel materials (carbon steel for mechanical structure, rolled steel for general structure), and the like can be used.

(Screw)
The screw 50 is not limited as long as it has a head and a cylindrical shaft in which a screw thread is engraved. The head shape is preferably a pan (flat), but may be a dish or a truss. The hole on the top surface of the head is preferably a hexagonal hole, but may be a cross hole. The screw 50 is preferably made of metal such as stainless steel or nickel chrome steel, but may be made of plastic. Further, a plain washer or a spring washer may be used as appropriate.

<Example 1>
Examples according to the present invention will be described in detail below. Needless to say, the present invention is not limited to the following examples.

  The light source device of Example 1 is a light source for an external resonator type laser device having the structure of the example shown in FIG. The light source 10 includes a nitride semiconductor laser element having a light emission center wavelength of 405 nm having an antireflection film (AR coating: Anti-Reflection Coating) on the front end face and a reflective film having a high reflectivity on the rear end face. This is a mounted semiconductor laser device. The light source holding member 21 is a disc-shaped LD holder made of stainless steel and provided with a stepped hole in the approximate center thereof. The semiconductor laser device 10 is fitted into the stepped hole and fixed by laser welding. The optical component 15 is a collimator lens having an NA of about 0.6. The optical component holding member 22 is a cylindrical lens holder made of stainless steel, and the collimator lens 15 is fixed therein by application of an adhesive. The connecting member 23 is a stainless steel annular sleeve into which the lens holder 22 is inserted. This connecting member 23 adjusts the relative position in the xy plane of the semiconductor laser device 10 and the collimator lens 15 (optical axis adjustment), and is fixed to the LD holder 21 by laser welding. Furthermore, the lens holder 22 adjusts the relative position of the semiconductor laser device 10 and the collimator lens 15 in the z-axis direction (beam parallelism adjustment), and is fixed to the connecting member 23 by laser welding. In this way, the light source unit 20 is configured.

  The light source support member 30 is made of stainless steel and is a plate-like bracket having a size of 17 mm × 9 mm and a thickness of 1.7 mm, and a light source insertion hole 31 having a substantially circular fitting portion 311 having a diameter of 8 mm at the center thereof. Two substantially circular screw insertion holes 33 having a diameter D of 2.2 mm are arranged in parallel on a substantially straight line across the light source insertion hole. The center distance d between the fitting portion 311 and the screw insertion hole 33 is 6.5 mm. Further, a protrusion 312 having a protruding width of 1 mm and a thickness of 0.25 mm is provided at the rear side end of the fitting portion 311 in order to position the light source unit 20. The extending portion 315 of the light source insertion hole 31 is in close contact with the fitting portion 311 and has a substantially rectangular stepped diameter-enlarged portion 316 (corner having a diameter in the x-axis direction of 1.25 mm and a diameter L in the y-axis direction of 4 mm). The portion has a radius of 0.5 mm, and is continuous to the screw insertion hole with the same diameter as the screw insertion hole 33. The light source unit 20 is fitted into the fitting portion 311 of the light source support member 30 from the front side until a part of the LD holder 21 comes into contact with the protrusion 312 and is fixed to the light source support member 30 by laser welding from the back side. ing. The base member 40 is made of stainless steel and is a substantially box-like bracket having a thickness of 2 mm. A substantially circular hole with a diameter of 8.5 mm through which the light source unit 20 passes is provided at the approximate center of the surface to which the light source support member 30 is attached. Are provided, and two screw holes are provided between the two. The light source support member 30 that supports the light source unit 20 is fixed to the base member 40 by tightening an M2 × 3.0 mm screw 50 that is screwed into the screw hole of the base member through the screw insertion hole 33. As described above, the light source device of the first embodiment is configured.

  In the external resonator type laser device, a diffraction grating mounted on a rotation mechanism is arranged in front of the light source device as described above, and the diffraction light is irradiated with the emitted light from the collimator lens. A part of the laser beam is selectively fed back to the laser element to cause laser oscillation. In such an external resonator type laser apparatus, in order to obtain stable laser oscillation, it is necessary to adjust and maintain the optical axis of the light emitted from the collimator lens with high accuracy. According to the light source device, it can be realized.

  The light source support member and the light source device of the present invention include a light source for a high-density optical recording / reproducing apparatus such as a holographic data storage, a light source such as a laser display, a laser printer, an optical communication device, a general illumination or an internally illuminated signboard It can be suitably used for various illumination light sources such as external lighting signs, backlight light sources such as LED displays and liquid crystal display devices, traffic lights, illumination switches, various indicators, and various optical sensors.

DESCRIPTION OF SYMBOLS 10 ... Light source 15 ... Optical component 20 ... Light source unit 21 ... Light source holding member 22 ... Optical component holding member 23 ... Connection member 30 ... Light source support member (31 ... Light source insertion hole (311 ... Fitting part, 312 ... Projection, 315 ...) Extended portion, 316 ... step-like enlarged diameter portion, 317 ... tapered diameter enlarged portion), 33 ... screw insertion hole, 39 ... stress concentration region)
40 ... Base member 50 ... Screw 100 ... Light source device

Claims (7)

A light source insertion hole into which a light source or a light source unit having a light source is inserted; and a screw insertion hole into which a screw is inserted in parallel with the light source insertion hole, and is fixed to a base member of the light source device by the screw. A light source support member,
The light source insertion hole is a light source support member having a fitting portion into which the light source or the light source unit is fitted, and an extending portion provided between the fitting portion and the screw insertion hole.   2. The light source support member according to claim 1, wherein the extension portion has a maximum diameter in a direction perpendicular to a direction in which the light source insertion hole and the screw insertion hole are arranged in parallel to the extension portion.   The light source support member according to claim 2, wherein the extending portion is continuous with the screw insertion hole.   The said extending part has a step-shaped enlarged diameter part in which the diameter of the direction perpendicular | vertical to the parallel arrangement direction of the said light source insertion hole and the said screw insertion hole becomes large in steps toward the said fitting part. Light source support member.   The said extension part has a taper-shaped enlarged diameter part which becomes large as the diameter of the direction perpendicular | vertical to the parallel arrangement direction of the said light source insertion hole and the said screw insertion hole approaches the said fitting part. Light source support member.   The light source support member according to claim 4, wherein the stepped enlarged diameter portion or the tapered enlarged diameter portion is provided in close contact with the fitting portion. A light source;
A light source support member having a light source insertion hole into which the light source or the light source unit having the light source is inserted, and a screw insertion hole in which the screw is inserted in parallel to the light source insertion hole;
A base member to which the light source support member is fixed by the screw,
The light source insertion hole includes a fitting portion into which the light source or the light source unit is fitted, and an extending portion provided between the fitting portion and the screw insertion hole.

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