JPH0643767Y2 - Holder for lens holder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a holder used for assembling an optical coupler and the like, and is particularly used for adjusting and fixing an optical axis of a lens to a semiconductor light emitting element or a semiconductor light receiving element. The present invention relates to a holder for a lens holder for holding the lens holder that is formed.

[Conventional technology]

In optical communication, a semiconductor light emitting element for converting an electrical signal into an optical signal or a semiconductor light receiving element for converting an optical signal into an electrical signal and an optical fiber forming a transmission path for transmitting the optical signal are optically provided. An optical coupler for coupling is used. In this optical coupler, the optical coupling between the element and the optical fiber is often performed through a lens. Therefore, conventionally, the optical axis adjustment and fixing of the lens facing the element are performed. Is performed using the holder for the lens holder described below.

That is, FIG. 4 is a front view of a conventional lens holder holder, and FIG. 5 is a cross-sectional view showing a usage state thereof, in which 1 is a lens holder holder (hereinafter abbreviated as a holder). The holder 1 is composed of a main body 3 having a V groove 2, a flat plate-shaped pressing member 4, and screws 5 for fixing both end portions of the pressing member 4 to the main body 3.

6 is a semiconductor laser used as a light source of an optical coupler, that is, a semiconductor light emitting element, 7 is a base provided with the semiconductor light emitting element 6, 8 is a lens for converting light from the semiconductor light emitting element 6 into a parallel beam, 9a Is a cylindrical lens holder, and 10a is a sleeve having an inner diameter that matches the outer diameter of the lens holder 9a.

In this configuration, when the optical axis of the lens 8 is adjusted and fixed, that is, when the lens 8 is positioned and fixed with respect to the semiconductor light emitting element 6, first, the base 7 provided with the semiconductor light emitting element 6 is mounted on a predetermined mount or the like (not shown). Fixed, while lens 8
Is fixed to one end of the lens holder 9a by press fitting or adhesion.

Then, the other end of the lens holder 9a is attached to the main body 3 of the holder 1.
The presser foot 4 and the main body 3 are inserted into the V groove 2 provided on the
The lens holder 9a is sandwiched between and fixedly held in the V-groove 2 and the lens 8 is opposed to the semiconductor light emitting element 6, and a sleeve 10a is fitted and attached to the outer periphery of the lens holder 9a.

At this time, the end surface of the sleeve 10a is separated so as not to contact the end surface of the base 7.

In this state, the semiconductor light emitting element 6 is caused to emit light and the lens 8
While measuring the light passing through by a measuring device not shown,
Similarly, the holder 1 is moved in the X, Y, and Z directions by a mechanism (not shown) to adjust the optical axis of the lens 8 with respect to the semiconductor light emitting element 6.

After the adjustment is complete, fix the holder 1 so that it will not move,
After the sleeve 10a is slid to the base 7 side to bring the end surfaces into contact with each other, the contact portion A between the lens holder 9a and the sleeve 10a and the contact portion B between the sleeve 10a and the base 7 are respectively welded by a YAG laser welding machine or the like. Fix by welding.

[Problems to be solved by the invention]

However, in the above-described conventional holder, the main body for fixing and holding the lens holder has a shape extending directly from the lens holder in the direction orthogonal to the optical axis, and the lens holder and the sleeve are fixed by welding, and the sleeve and the base are fixed. In order to obstruct the welding and fixing of the lens holder, it is necessary to make a space between the main body of the holder and the lens holder / base for taking in the laser light, etc. It becomes necessary not only to increase the size of the module when the semiconductor light emitting element and the lens are integrated, but also to increase the size of the optical coupler formed by integrating this module and the optical fiber. The problem is that

Further, in this type of optical coupler, high-precision positioning on the order of micron is required for fixing the lens to the semiconductor light-emitting element or the like. However, if the lens holder is lengthened as described above, the position of the lens and the holding tool will There is a problem in that the positions to be held are greatly separated, and as a result, the lens holder moves when the lens is fixed, making it difficult to position and fix the lens with high accuracy.

The present invention has been made to solve such a problem, and it is possible to miniaturize a module configured by integrating a semiconductor light emitting element or a semiconductor light receiving element and a lens, and to perform highly accurate positioning. It is an object of the present invention to realize a lens holder holder capable of

[Means for solving problems]

In order to achieve the above-mentioned object, a holder for a lens holder according to the present invention is composed of a cylindrical main body and a screw, and the main body has a fitting portion having an outer diameter smaller than the inner diameter of the lens holder at one end. And a slit having a predetermined length that divides the fitting portion in the axial direction, and a screw hole communicating from the slit to the outer peripheral surface is provided.

[Action]

According to the present invention having the above-mentioned structure, when the fitting portion formed at one end of the main body is fitted inside the other end of the lens holder having the lens attached at one end, and the screw is fitted into the screw hole of the main body and rotated. , The tip of this screw passes through one side surface of the slot and contacts the other side surface, so by further rotating the screw, the tip presses the other side surface, whereby the part of the slot 16 is spread. The diameter of the main body increases, and as a result, the outer peripheral surface of the fitting portion is pressed against the inner peripheral surface of the lens holder,
The lens holder can be fixedly held by this pressure contact force.

In this case, the main body extends in the axial direction of the lens holder. Therefore, after positioning the lens fixed to the lens holder with respect to the semiconductor light emitting device, etc., the lens holder and the sleeve, and the sleeve and the base are welded. When fixing, the main body does not hinder welding, and therefore the axial length of the lens holder can be shortened, thereby miniaturizing the module configured by integrating the semiconductor light emitting element and the lens with the lens. Further, by using this module, a compact optical coupler or the like can be obtained.

In addition, since the axial length of the lens holder can be shortened, the position of the lens is close to the holding position of the lens holder by the holder, and the lens holder does not move during welding and fixing. It will be possible.

〔Example〕

 Embodiments will be described below with reference to the drawings.

FIG. 1 is a view showing the structure of an embodiment of a holder for a lens holder according to the present invention. FIG. 1 (I) is a front view and FIG. 1 (II) is a side view.

In the figure, 11 indicates a holder for a lens holder (hereinafter abbreviated as a holder), and this holder 11 is a cylindrical main body 12 and a screw.
The main body 12 has a fitting portion 14 having an outer diameter smaller than the inner diameter of the lens holder described later at one end, and a screw portion 15 is formed on the outer circumference of the other end. A slit 16 having a predetermined length that divides the fitting portion 14 in the axial direction.
And a screw hole 17 communicating with the slit 16 on one side, and the screw 13 can be screwed into the screw hole 17.

Reference numeral 18 denotes a support, and this support 18 has a screw hole in the plate thickness direction, and the holder 11 can be attached by screwing the screw portion 15 of the main body 12 into the screw hole. .

FIG. 2 is a view showing a usage state of the embodiment of FIG. 1, in which 6 is a semiconductor light emitting element, 7 is a base, and 8 is a lens, which are the same as those in FIG.

9b is a lens holder, and 10b is a sleeve. These are structurally the same as the lens holder 9a and the sleeve 10a in FIG. 5, but the axial length of the lens holder 9b is less than half of 9a, and the sleeve 10b is also The outer diameter is smaller than 10a.

Next, the operation will be described. First, the main body 12 of the holder 11 is attached to the support 18 by the screw portion 15, and the lens 8 is attached to one end of the lens holder 9b. The fitting portion 14 of the main body 12 is inserted, and the screw 13 is screwed into the screw hole 17.

Then, as the screw 13 is rotated, the tip of the screw 13 penetrates one side surface of the slit 16 and abuts against the other side surface, so when the screw 13 is further rotated, the portion of the slit 16 is spread. Since the outer diameter of the main body 12 is increased, the outer peripheral surface of the fitting portion 14 is pressed against the inner peripheral surface of the lens holder 9b, so that the lens holder 9b is fixedly held by the fitting portion 14 of the main body 12 by this pressing force. It In this case, the main body 12 has a shape extending in the axial direction of the lens holder 9b.

After this, the sleeve 10b is attached to the lens holder 9b.
The base 7 fitted around the outer periphery of the base 7 and provided with the semiconductor light emitting element 6
Is fixed to a predetermined mount or the like (not shown), and the lens 8 is opposed to the semiconductor light emitting element 6.

At this time, the end surface of the sleeve 10b is separated so as not to contact the end surface of the base 7.

In this state, the semiconductor light emitting element 6 is caused to emit light, and the light passing through the lens 8 is measured at the other end side of the main body 12 of the holder 11 by a measuring device (not shown) or the like, and is integrated with the support 18 by a mechanism (not shown). Move the holder 11 in the X, Y, and Z directions to
The optical axis of the lens 8 with respect to the semiconductor light emitting element 6 is adjusted.

After the adjustment is completed, the holder 11 is fixed together with the support 18 so as not to move, and the sleeve 10b is slid toward the base 7 side to bring the end surfaces into contact with each other, and then the lens holder.
The contact portion A between the sleeve 9b and the sleeve 10b and the contact portion B between the sleeve 10b and the base 7 are welded and fixed by a YAG laser welding machine or the like. At this time, the main body 12 of the holder 11 is fixed to the lens holder 9a as described above. Since it extends in the axial direction, it does not hinder welding.

FIG. 3 is a cross-sectional view of an optical coupler formed by using a module in which the semiconductor light emitting element 6 and the lens 8 are integrated as described above, and the module after being removed from the holder 11 has stepped holes 19 Is inserted into one end of a cylindrical case 20 having a cylindrical shape, and fixed from the other end of the case 20 with a plug 22 fixedly holding one end of an optical fiber 21 and the lens 8
A lens 23 is arranged and fixed between the optical fiber 21 and the optical fiber 21, and the lens 23 is for forming an image of the semiconductor light emitting element 6 converted into a parallel beam by the lens 8 on the end face of the optical fiber 21. Therefore, the semiconductor light emitting device 6 and the optical fiber 21 are optically coupled via the lenses 8 and 23.

In the above-described embodiment, the case where the lens 8 facing the semiconductor light emitting element 6 is fixed is described.
The same can be applied to the case where the lens facing the semiconductor light receiving element is fixed.

[Effect of device]

As described above, according to the present invention, the main body having the fitting portion and the slit that fits inside the other end of the lens holder having the lens fixed at one end is spread with a screw to increase the diameter of the main body. Since the lens holder is fixedly held by pressing the outer peripheral surface of the fitting portion against the inner peripheral surface of the lens holder, the main body extends in the axial direction of the holder, and therefore the lens holder and the sleeve, When the sleeve and the base are fixed by welding, the main body does not hinder the welding, so that the axial length of the lens holder can be shortened, thereby integrating the semiconductor light emitting element or the light receiving element and the lens. It is possible to miniaturize the module configured by the above, and by using this module, it is possible to realize a compact optical coupler. .

Further, since the axial length of the lens holder can be shortened, the position of the lens and the holding position of the lens holder by the holder are close to each other, and the lens holder does not move during welding fixing, so that the lens can be positioned and fixed with high accuracy. The effect is obtained.

[Brief description of drawings]

FIG. 1 is a view showing the structure of an embodiment of a holder for a lens holder according to the present invention, FIG. 2 is a side sectional view showing the usage state of FIG. 1, and FIG. 3 uses the module of FIG. FIG. 4 is a sectional view of the optical coupler, FIG. 4 is a front view showing a conventional example, and FIG. 5 is a side sectional view showing a usage state of the conventional example. 6 ... Semiconductor light emitting element, 7 ... Base, 8 ... Lens, 9a, 9b
… Lens holder, 10a, 10b… Sleeve, 11… Holder, 12
… Main body, 13… Screw, 14… Mating part, 16… Grooving, 17… Screw hole, 18… Support.

Claims (1)

[Scope of utility model registration request] 1. A holder for a lens holder for fixedly holding a cylindrical lens holder having a lens fixed at one end, wherein a fitting portion having an outer diameter smaller than the inner diameter of the lens holder is formed at one end. And a cylindrical main body having a threaded hole that divides the fitting portion in the axial direction and having a screw hole communicating with the outer peripheral surface from the slit, and a screw screwed into the screw hole, By fitting the fitting part of the main body to the other end of the lens holder and screwing the screw into the screw hole and pressing the side surface of the slit at the tip, the diameter of the main body is expanded and the outer circumference of the fitting part is increased. A holder for a lens holder, characterized in that the lens holder is fixedly held by bringing the surface into pressure contact with the inner peripheral surface of the lens holder.