JPS58171013A - Optical device - Google Patents

Abstract

PURPOSE:To make the connection of fiber easy and the arranging work of lens simple by combining functional elements for branching, coupling, etc. of light with a flat plate microlens which is formed partly with a lens part and is connected with optical fiber at one end face. CONSTITUTION:A semispherical lens part 3 of which the refractive index is largest at the center and decreases gradually toward the outer side is formed integrally within the side wall thickness on one side 2a of a transparent glass base material 2 for a flat plate microlens 1, and the focal length of the part 3 is made equal to the thickness of the material 2. The incident light from optical fiber 6 connected to the part 3 on the axial line thereof exists as parallel luminous fluc from the face 2a. With a device 13 wherein the microlenses 16a, 16b, 16c and two prisms 4 are combined, the incident light from an optical fiber 15a can be drawn out from optical fibers 15b, 15c. Thus, the need for matching of optical axes is eliminated in the stage of manufacturing various devices in combination with functional elements for branching, confluence, switching of optical path of light.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical device whose basic element is a flat microlens that has a lens function even though it is flat.

Optical switches, optical branching circuits, optical demultiplexing circuits, etc. used in fields such as optical communication and measurement require elements that convert light rays from light sources and optical fibers into parallel beams, or converge parallel beams to a single point. do. Conventionally, a distributed refractive index rod lens (trade name: SELFOC lens) has been used as this element.

When such a distributed index rod lens is used, it is necessary to align the axes of a large number of lenses with the necessary precision and bundle them in a -dimensional or two-dimensional shape, which is a cumbersome task.゛ Are the lenses bundled again? It has problems such as being difficult to maintain, and has the disadvantage of not being able to be mass-produced.

The present inventor has devised the present invention in order to improve the above-mentioned conventional problems.The purpose of the present invention is to make it extremely easy to join optical fibers, and to simplify the work of arranging lenses in a single row. Our goal is to provide a variety of optical devices.

In order to achieve such an object, the present invention connects an optical fiber to one surface of a flat microlens in which a lens portion is integrally formed within a transparent base material, and also provides a method for branching and converging light to this flat microlens. The gist is that elements for performing switching, demultiplexing, multiplexing, etc. are laminated.

An example of the implementation of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a flat microlens, which is a basic element of various devices according to the present invention. A substantially hemispherical lens portion 3 having a refractive index distribution that gradually decreases toward the outside is integrally formed, and the focal length of this lens portion 3 is made to be approximately equal to the thickness of the base material 2. . And the other surface 2b of the base material 2
A support plate 4 is attached to the support plate 4σ), and the lens portion 3
The optical fiber 6 is inserted into the hole 5 drilled in the part that coincides with the optical axis of the
The end of the optical fiber 6 is inserted so that the end surface of the optical fiber 6 comes into contact with the other surface 2b of the base material 2.

Therefore, the light incident from the optical fiber 6 is transmitted to the lens portion 3.
The light beam is refracted by the beam, converted into a parallel beam of light, and emitted from one side 2a.

In addition, in order to create such a flat microlens 1, a transparent base material 2 is made of alkali-containing glass, a mask for preventing ion transmission having a patterned opening in the lens portion is attached to one side of the base material 2, and then thallium, cesium The lens portion 3- is formed by performing ion exchange naturally or by applying a voltage in a molten salt containing ions that greatly contribute to increasing the refractive index.

Figures 2 and 3 show modified examples of flat plate microlenses.
The flat microlens 7 shown in FIG. 2 is obtained by bonding two flat microlenses 1 shown in FIG. 1 so that their lens parts 3 face each other, and the flat microlens 7 shown in FIG. The lens 8 is made by bonding two flat microlenses 1 shown in FIG. 1 so that their lens portions 3 face the same direction. By doing this,
This can be achieved by reducing the thickness of the base material, improving NA (numerical aperture), and correcting aberrations. Therefore, the first
Three or more flat microlenses shown in the figure may be bonded together. Needless to say, when constructing a flat microlens by laminating two or more base materials in this way, the thickness of the outermost base material to which the optical fibers are connected is equal to the thickness of the lens that integrates the lens parts of the individual base materials. Select approximately equal to the focal length of the system.

FIG. 4 and subsequent figures show various optical devices according to the present invention using the above-mentioned flat microlenses. Of these, FIG. 4 shows a coupler 9, which is a combination of two flat microlenses 10a and 10b. On the other hand, light source 1 is in 10a.
1, and the optical fiber 12 is connected to the other 10b,
With the end faces of the flat microlenses 10a and 10b brought into contact with each other, the light beam from the light source 11 is made parallel by the flat microlens 10a (1), and the parallelized beam is focused by the flat microlens 10b and then into the optical fiber 12. It's meant to be entered.

5 to 10 show devices constituting an optical add/drop multiplexer circuit, and the device 13 shown in FIG. 5 has optical fibers 15a and 15b on three end faces of a combination of two prisms 14 and 14.

15c are connected to the flat plate microlenses 16a.

16b and 16c are brought into contact with each other, half of the luminous flux incident through the optical fiber 15a is reflected by the semi-transparent reflective surface 14a of the prism and taken out from the optical fiber 15b, and the remaining half is passed through the reflective surface 14a and removed from the optical fiber 15c. I'm trying to take it out. The device 1T shown in FIG. 6 has one prism 14 and
The flat plate fibro lenses 18a, 18b, and 18c function slightly. However, it is functionally similar to the device 13 shown in FIG. The device 19 shown in FIG. 7 is made by integrating two microlenses 20 and 20 whose surfaces opposite to the surface on which the lens portion is formed is an inclined surface by butting their respective inclined surfaces. 20,
When flat plate microlenses 22a and 22b with optical fibers 21a and 21b connected to both end faces of 2°0 were brought into contact, a flat plate microlens 22c with an optical fiber 21c connected to the intermediate portion was also brought into contact. As described above, the deflection effect is as follows: half of the light beam incident through the optical fiber 21a is reflected by a half mirror provided on the inclined surface of the microlens 2o, and the branched light beams are sent to the optical fibers 21'b, 21c. I'm trying to take it out.

The device 23 shown in FIG. 8 has a pair of flat microlenses 24a, 24b'j;-butted together, one of the flat microlenses 24b is provided with a notch 25, and the end face of the notch 25 is a total reflection surface. A transparent body 2 is placed inside the notch 25.
Insert 6! A part of the light beam entering from the optical fiber 27a connected to the flat microlens 24a is reflected by the total reflection surface and exits through the transparent body 26, and the remaining light beam enters the flat microlens 24a.
The device 28 shown in FIG. 9 taken out from the optical fiber 27b of FIG.
flat plate microlenses 31a, 31b-, 31c connected to optical fibers 30a, 30b, 30c are brought into contact with respective side end surfaces of the prism 29. The object that hits the inner end surface 29a is totally reflected here and enters the flat microlens 31c, and also enters the inner end surface 29a.
The light hitting b is totally reflected by this surface and enters the flat microlens 31b. A device 32 shown in FIG. 10 is constructed by inserting a prism 35 having a wedge-shaped total reflection surface between flat plate micro lenses 34a, 34b, and 34c to which optical fibers 33a, 33b, and 33c are connected. 33a, 'The luminous flux incident through the flat microlens 34a is reflected in the right angle direction by the total reflection surface, and the flat microlens 34b.

It is taken out using 34C optical fibers 33b and 33c.

Furthermore, FIGS. 11 and 15 show devices constituting the optical multiplexing and demultiplexing circuit, and the device 3 shown in FIG.
6 is a prism 37a, 37b, 3 whose one end surface is an inclined surface.
7c, 37d, 37e.

37f are placed facing each other, and an optical fiber/<-38a is placed on the inclined surface of the husband's prism.

38b, 38c, 38d, 38e, and 38f are connected to flat plate microphones CffL/7s 39a, 39b, and 39c.

The prisms 39d, 39e, and 39f are in contact with each other, and each prism is further provided with an interference filter film that allows only light of a specific wavelength to pass therethrough. Specifically, within the prism 37a is a film 40a that transmits only light of wavelength λ and reflects light of other wavelengths, and within prism 37b is a film 40a that transmits only light of wavelength λ and reflects light of other wavelengths. The reflective film 40b is replaced by a prism 37c.
Inside is a film 4 that transmits only the light of wavelength λ and reflects the others.
0c, the prism 3rd has a film 40d that transmits only the λ4 wavelength light and reflects the other wavelengths, and the prism 37e has the λ wavelength.

A film 40 that transmits 12/- of the wavelength of light and reflects the other wavelengths.
A film 40f is sandwiched between the prism 37f and the prism 37f, which transmits only light having a wavelength of λ and reflects the other light.

First, only the light of wavelength λ1 is transmitted through the film 40a, and the light of wavelength λ1 is transmitted through the flat microlens 39a1.
Light of wavelength λ is emitted from the optical fiber 38a, and similarly from the flat plate microlens 39b and the optical fiber 38b,
λ from the flat plate microlens 39c1 and the optical fiber 38c
It is possible to extract light for each wavelength, such as emitting light of different wavelengths.

FIG. 12 also shows a device 41 that performs the same function as in FIG. 11.
This device differs from the device 36 shown in FIG. 11 in that a prism is not interposed in the middle.

That is, the light incident from the flat plate microlens 43a to which the optical fiber 42a is connected passes through the film 44a, and only the light having a wavelength of λ is transmitted through the film 44a, and is emitted from the flat plate microlens 43b to which the optical fiber 42b is connected.
A flat plate microlens 4 is connected to an optical fiber 420 through which only light having a wavelength of λ is transmitted through a film 44b through a microlens 5.
3c, two flat plate microlenses 43d, 43e and optical fibers 42d, 42e are sequentially emitted for each wavelength.
Emits from. A device 46 shown in FIG. 13 has three optical fibers 48a and 48b on one end surface of one flat microlens JIk7.

48c, and a grid 49 near the other end surface.
The reflection angle of the light incident from the optical fiber 48a is changed for each wavelength by the grid 49, and then the light enters the flat plate microlens 47 again.
48b and 48c. A device 50 shown in FIG. 14 has substantially the same configuration as the device 46, except that the number of optical fibers connected to the flat microlens 47 is five. 1st
A device 51 shown in FIG. 5 has a unit 54 formed by stacking two flat microlenses 52, 52 with a film 53 in between, and connecting optical fibers to these lenses 52, 52 with their optical axes shifted. The first unit extracts only light with a wavelength of λ1, and the next unit extracts only light with a wavelength of λ.

16 to 24 show devices constituting a switch, and the device 55 shown in FIG. 16 has four optical fibers 57 a , 57 b + 57 c on one end surface of one flat microlens 56.

57d, a mirror 58 is rotatably disposed near the other end face, and the light incident through the optical fiber 57a is connected to the optical fibers 57b and 57c by appropriately selecting the angle of the mirror 58.

57d.

A device 59 shown in FIG. 17 has two flat microlenses 60a and 60b connected to each other, and one optical fiber 61a is connected to the end face of one of the flat microlenses 60a without contacting it. In addition, two optical fibers 61b and 6 are connected to the other flat microlens 6-Ob.
1c is similarly presented with some performance. And the flat plate
By making the microlens 60a movable in the vertical direction in the figure, light incident from the optical fiber 61a is selectively entered into either of the optical fibers 61b and 61c. The device 62 shown in FIGS. 1-8 includes three flat microlenses 63a and 63b.

63c are installed in parallel, and each lens has an optical fiber 64a,
64b and 64c are connected, and a prism 65 is movably provided near the flat microlens on the opposite side to the side where these optical fibers are connected. Then figure “
In the state shown in , the light entering the optical fiber 64a or the G flat microlens 63a is reflected by the prism '65, enters the flat microlens 63b, and is extracted from the optical fiber 64b. Then, when the prism 65 is moved downward in the figure, the light from the flat microlens 63c enters the flat microlens 63b, and the optical fiber 6
``Taken out from 4b. Device 66 shown in FIG.
In the figure, one flat plate microlens 67a is arranged on the left side, and two flat plate microlenses 67b and 67c are arranged on the right side, and optical fibers 68a, 68b, and 68c are arranged respectively.
A movable refracting body 69 is diagonally interposed between each of the flat microlenses. In the state shown in the figure, the optical fiber bar 68. The light that has entered the flat microlens 67a passes through the refractor 69, enters the flat microlens 67c, and is extracted from the optical fiber 68c. Further, when the refracting body 69 moves downward from the state shown in the figure, the light from the flat microlens 67a enters the flat microlens 67b located directly opposite to it. The device 70 shown in FIG. 20 is an optical fiber 71a.

A planar hexagonal refracting body 73 is disposed in the middle of two pairs of flat plate microphones 72a, 72b, 72c, and 72d to which 71b, 71c, and 71d are connected, respectively, so as to be movable up and down in the figure.
In the state shown in the figure, the light from the flat microlens 72A passes through the refractor 73 and enters the flat microlens 72d, and the light from the flat microlens 72b passes through the refractor 73 and enters the flat microlens 72c. When the refractor T3 moves upward from this state, the light from the flat microlens 72b directly enters the flat microlens 72d, the light from the flat microlens 72a is blocked, and the refractor 73 moves downward. When lowered, the light from the flat microlens 72a directly reaches the flat microlens 7.
2c, and the light from the flat microlens 72b is blocked. - The device 74 shown in FIG. 21 has one flat microlens 77a disposed above a columnar body 76 whose tip end is an inclined mirror surface 75, and
4 around the column 76 at approximately the same height as the mirror surface 75.
flat plate microlenses 77'b, 77c, and 77d.

77e, and optical fibers 78a, 78b, 78c, and 78d are connected to the respective flat microlenses.

78e is connected. The columnar body 76 is rotatable, and depending on the rotation angle of the columnar body 76, the optical path of the light from the flat microlens 77a is changed by the mirror surface 75, and the optical path is changed to the flat microlens 77b.

The light will be incident on one of 77c, 77d, and 77e. The device 79 shown in FIG.
d is a flat microlens 80a.

80c are arranged in a straight line, and a trapezoidal reflector 81 is removably inserted between these flat microlenses. In the state shown in FIG. 1, the light from the flat microlens 80a is reflected by the reflective surface 81a of the reflector 81 and enters the flat microlens 80b, and the light from the flat microlens 80d is reflected by the reflector 81. It is reflected by the surface 81b and enters the flat microlens 80c. Also, the reflector 81
When the microlens 80a is moved upward, the light from the flat microlens 80a directly enters the flat microlens 80c, and the optical path is changed. A device 82 shown in FIG. 23 has a liquid crystal 84 interposed between two halves of a refracting body 83.83, and optical fibers 84a, 84b, 84 are connected to the end face of the refracting body 83.83.
Flat plate microlenses 85a and 85 connected to c and 84d
b, 85c.

Normally, light is conducted between the flat microlenses 85a and 85d1 and 85b and 85c and 2, and when an electric field is applied, the liquid crystal 84 becomes opaque and blocks the optical path. . If you apply an electric field in this way to turn the switch on and off (
)-N, OFF reaction occurs extremely quickly. Further, a device 86 shown in FIG. 24 can also be turned on and off quickly without any mechanical operation, and is composed of an optical fiber 87a.

87b is connected to a flat plate microlens 88a.

An element 89 is interposed between the elements 88b, and a flat microlens 88c is provided which connects the side surface 1 of this element 89 to the optical fiber 8IC. The element 89 has an electro-optic crystal 90 arranged in the center, and cylindrical lenses 91.91 are laminated on both sides of the electro-optic crystal 90.
Calcite 92° 92 is provided on both sides of the calcite 92, and the flat microlens 88a is in contact with one of the calcite 92. A half mirror 93 is laminated on the side surface of the other calcite 92, the flat microlens 88c is in contact with the side surface of the half mirror 93, and another calcite 92 is provided on the end surface of the half mirror 93. The flat plate microlens 88b is in contact with.

Then, when an electric field is applied, the light from the flat plate microphone-lens 88a quickly changes by 9 μm to the flat plate micro-lens 88b.

88c.

Figures 25 to 29 show devices constituting an optical non-reciprocal circuit, that is, optical lasers.
The device 94 shown in the figure has a substantially rectangular parallelepiped shape.
(Itnoum Iron Garnet) 95 or Faraday glass with magnets 9,6,96 arranged above and below, and an optical fiber 98a connected to the top of the front (left side in the figure) end face of YIG95 via a Rochon prism 97a. Attach the flat plate microlens 99a, and also
A flat plate microlens 99b to which an optical fiber 98b is connected via a Rochon prism 97b is attached to the lower part of the rear end face of the IG95 (on the right side in the figure).
The lower part of the front end face and the upper part of the rear end face of No. 5 are respectively provided with total reflection surfaces 10.
0a and 100b. So magnet 96.9
When light enters from the flat plate microlens 99a with a magnetic field applied to the YIG95 by 6, the light is first linearly polarized by the Rochon prism 97a, and then the YIG95
5, it is reflected many times and the exit portion of the rotchon prism 9 is reflected.
The plane of polarization is rotated by 45 degrees before entering 7b, and while maintaining this angle, it passes through the Rotsion prism 97b, enters the flat microlens 99b, and is taken out from the optical fiber 98b. Here, the linearly polarized light is partially reflected by the end face of the optical fiber 98b, and even if the reflected light returns to the Rotchon prism 97b and the YIG95, the Rotchon prism 97
Since the light is shifted by 900 degrees from the direction a, it never passes through the Rotschon prism 97a, and the light always passes only in the forward direction.

Therefore, when used in a semiconductor laser, the reflected light does not cause abnormal oscillation of the semiconductor laser, making it extremely effective. , the device 101 shown in FIG.
Rochon prisms 103, 103 are stacked on both ends of the 102 (and magnets are placed above and below) 104.1
04, and then Rotushon prism 103.103
Flat plate microlenses 105a and 105b to which optical fibers 104a and 104b are connected, respectively, are brought into contact with the end faces of the lenses. The effect is similar to that described above, where the light incident from the flat microlens 1051L is linearly polarized by the Rotschon prism 103, and this linearly polarized light is converted into YIG102.
By rotating the prism 103 by 45 degrees, reflected light is prevented from passing through the Rochon prism 103. The device 106 shown in FIG.
08.108 and flat plate microlenses 1091L and 109b are placed in contact with both end faces, and these flat plate microlenses 109! L, 109b with calcite 1101L, 11
Optical fibers 111&, 111b are connected via 0b. The effect is similar to that described above to prevent reflected light from returning. The device 112 shown in FIG.
Rochon prism 1 as a polarizer is mounted on the end face of 113.
15a and a prism 116a for changing the optical path.

A Rochon prism 115b as a polarizer and a prism 116b for changing the optical path are provided on the end face of the crystal optical rotator 114. contact.

Also, the optical fiber 11 is connected to the rotation prism 115b.
Flat plate microlens 118c connecting 7c and 117b
.

118d is in contact with it. Therefore, flat plate microlens 1
The light that entered the device 112 through the trench 181L exits from the flat microlens 118C, and the light that entered the device 112 through the grooved flat microlens 118b exits from the flat microlens 118d. The light passes only in the forward direction without passing through the Rotschon prism 115a.

A device 119 shown in FIG. 29 has a hexagonal Rothon prism 121 disposed near the other end surface of a feather-shaped Rothon prism 120 with one end protruding and the other end recessed.
YIGI between these rotation prisms 120° and 121
22.122 and YIG122.12
Magnets 123° 123 are arranged above and below the rotation prism 120, and an optical fiber 12 is arranged on one end surface of the rotation prism 120.
Flat plate microlens 12 to which 42L and 124b are connected
51L and 125b are brought into contact with each other, and flat plate microlenses 125c and 125d to which optical fibers 124c and 124d are connected are brought into contact with the end faces of the Rotsion prism 121. Therefore, the flat plate microlens 125&
Light that has entered the drag vise 119 exits from the flat microlens 125c, and light that has entered the device 119 from the flat microlens 125b exits from the flat microlens 125d. At this time, optical fiber 1
Similarly to the above, the reflected light that is reflected back from the end faces of 24c and 124d cannot pass through the Rochon prism 120, and only the light in the forward direction passes through.

FIGS. 30 and 31 show devices constituting the optical branching and coupling circuit, and the device 126 shown in FIG.
A pair of flat microlenses 127L127b are butted together via a half mirror 128.

One flat plate microlens 127a includes two optical fibers 1291L whose optical axes are shifted from each other with respect to the lens.

129b and the other flat microlens 127b.
Two optical fibers 129c and 129d are also connected to the optical fibers 129c and 129d. Therefore, half of the light that enters the flat microlens 127a from the optical fiber 129a is transmitted to the half mirror 1.
28 and exits from the optical fiber 129b, and the rest passes through the half mirror 128.

Optical fiber 12 via flat plate microlens 127b
It emits from 9d. Further, the light incident from the optical fiber 1290 is also branched into optical fibers 129b and 1 as described above.
It emits from 29d. Therefore, optical fiber 129b
, from 129d, light 77 Iha 12'9L and 129
The light from C is combined and emitted from Z. Similarly to FIG. 30, FIG. 31 also shows a device 13 that branches and combines light.
0, and in this embodiment, a pair of flat microlenses 13 abutted against each other via a half mirror.
1a, 131b.

A large number of optical fibers 132 are connected to each one.

FIG. 32 shows a device 133 constituting an optical attenuation circuit. This device 133 consists of an input flat plate microlens 136a to which an optical fiber 1351L is connected to both ends of the optical attenuation element 134, and an output flat plate to which an optical fiber eyeper 135b is connected. The microlenses 136b are brought into contact with each other, and the attenuation element 134 is connected to the flat microlens 136&.
The light is attenuated by entering the microlens 136b, and the attenuated light is extracted from the flat microlens 136b.

Although various devices have been described above, the present invention is not limited to the above, but can be applied to any optical device that uses a flat microlens.

As is clear from the above description, according to the present invention, an optical fiber is connected to one end surface of a flat microlens whose lens portion is integrally formed within a transparent base material.

Furthermore, this flat microlens can branch, merge, and demultiplex light.
Since multiplexing and polarization plane rotation are combined with various functional elements that perform optical path switching, there is no need to perform optical axis alignment when preparing various devices, and it is extremely easy to perform one-dimensional processing. It has many advantages such as being able to be arranged in an array or a two-dimensional matrix and maintain that state.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, and FIGS. 1 to 3 are plan cross-sectional views of a flat microlens that is a basic element of various devices according to the present invention, and FIG. 4 is a cross-sectional view of a flat microlens that is a basic element of various devices according to the present invention. 5 to 10 are schematic diagrams of devices constituting an optical add/drop multiplexer circuit; FIGS. 11 to 15 are schematic diagrams of devices constituting an optical multiplexing and demultiplexing circuit; Figures 16 to 24 are schematic diagrams of devices configuring the switch, Figures 25 to 29 are schematic diagrams of devices configuring the non-reciprocal circuit, and Figures 30 and 31 are schematic diagrams of the devices configuring the optical branching and coupling circuit. Schematic diagram of the device to be configured,
FIG. 32 is a schematic diagram of a circuit constituting the optical attenuation circuit. In addition, 1.7.8, 10a, 10b, 181Lt1 in the drawing
8k), 18c, 22a, 22b, 22c,
24a, 24b, 31L31b, 31c, 39a, 39
b, 39c, 39d, 39e. 39 f, 43 a, 43 b, 43 c, 43 mountain, 43e+ 47゜52, 56.60&, 60b,
53a, 63b, 63c, 671L. 67b, 67c, 72a, 72b, 72c, 72d, 7
7a. 77b, 77c, 77d, 77e, 8Qa, sob,
80c. 80d, 851L, 85b, ssc, ascl, 88+
! L, 88b. 88c, 99a, 99b, 105! L, 105b, 10
9! L. 109b, 118a, 118b, 125a, 125b,
125c. 125d, 1271! L, 127b, 131.131b
, 136! L. 136b is a flat plate microlens, 2 is a transparent base material, 3 is a lens portion, 6, 12.15a, 15b, 15c. zia, 21b, 21c, 27L, 27t), 3Qa,
30b. 30c, 33a, 33b, 33c, 381L, 38b,
38c. 38d, 38e, 38f, 421L, 42b, 42c,
42d. 42e, 48! L, 48b, 48e, 5, 7a, 57b
, 57c. 57d, 61m, 61b, 61c, 641-, 64b, 64c. 68a, 68b, 68C, 71&, 71b, 71C, 7
1d. 78a, 78b, 78c, 84a, 84b, 84c, 8
4d. sya, 87b, 87c, 98a, 98b, 10
4a, 104b. 111&, 111b, 1171L, 117b, 124a
, 124b. 124c, 124d, 1291L, 129b, 129c
, 129d. 132.13SL, 135b is optical fiber, 9.13
゜17, 19.23.28.32.36.41.46.
50.51°55, 59.62.66, 70.74.7
9.82.86.94゜101.112,119,12
6, 130, 133 are devices. 14.26.29, 35, 37a, 37b, 37c, 3
7d. 37e, 37f, 4Qa, 40b, 40c, 40d, 4
0e. 40f, 44&, 44b, 45.49, 53.58.6
5゜69.73, 76.81, 83, 84.89.90
．． ! IN. 92.93,95,96.97&,97b,102,1
03゜104.107,108,110&, 110b,
113,114°115&, 115b, 1162L, 1
16b, 120, 121, 122° 123, 128.1
34 is an element. Patent applicant Nippon Sheet Glass Co., Ltd.
Ken Iga - Agent Patent Attorney Part 1
)Continued from page 1 of Figure 30, Kunihiko Ohashi, patent attorney. Applicant: Ken Iga - Inside the Precision Engineering Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama.

Claims (1)

[Claims] An optical fiber is connected to one end face of a flat plate microlens whose lens part is integrally formed within a transparent base material with a flat surface, and the optical fiber is connected to the flat plate microlens to which light is branched, merged, and separated. An optical device that combines functional elements that perform wave, multiplexing, polarization plane rotation, optical path switching, etc.