JP2000238842A - Image observation apparatus and observation jig used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a good observation state irrespective of a shape of a work and therefore to select an optimum shape for recording as the work. SOLUTION: The image observation apparatus 2 for observing a three- dimensional image FT1 recorded inside comprises an image recording object (work) WK1 with the three-dimensional image FT1 recorded inside a transparent solid material, a jig case 31 receiving the object WK1 in a hollow chamber TK2 formed of a transparent material and a liquid LQ having an index of refraction approxitnate to that of the object WK1 which is received in the hollow chamber TK1 so that the object WK1 is sunk.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image observation apparatus for observing a three-dimensional image recorded optically or thermally in a transparent solid material, and an observation jig used for the same.

[0002]

2. Description of the Related Art Conventionally, there has been known a method of irradiating a laser beam inside a work made of an optically transparent solid material and optically or thermally recording a three-dimensional image.

FIG. 5 is a diagram showing an example of a method for recording a three-dimensional image, and FIG. 6 is a diagram showing an example of a three-dimensional image FTj recorded by the recording method shown in FIG.

In FIG. 5, a work WKj is made of a rectangular parallelepiped glass block and is held by a work holding device 81. The work holding device 81 is moved and driven and positioned in three directions of the X direction, the Y direction, and the Z direction by a driving device and a control device (not shown).

[0005] The first laser light source 82 emits a first laser light 82a directed toward the work WKj from a direction opposite to the X direction, and the second laser light source 83 emits a work laser light from the direction opposite to the Z direction. The second laser light 83a directed to WKj is emitted. The first laser light 82a and the second laser light 83a intersect at one intersection CP inside the work WKj.

The first laser beam 82a and the second laser beam 8
3a, the laser beams 82a, 83a
Are superimposed, and the energy density at the intersection CP becomes a high value. At the intersection point CP, a part of the energy is absorbed by the nearby glass, the temperature thereof rises sharply, and the volume expands rapidly. For this reason, a large stress is generated between the glass and the surrounding glass, and a minute crack is generated. Thus, a dot-like trace TC is formed on the work WKj at the intersection CP.

By repeating this process while moving the position of the work WKj in the X, Y, and Z directions, traces TC are formed at the respective positions corresponding to the X, Y, and Z coordinates, and Trace T in work WKj
C is distributed three-dimensionally. Thereby, the work WK
For example, a three-dimensional image FTj as shown in FIG. 6 is recorded in j.

There is also a method in which only one laser light source is used, a laser beam is focused on a specific point inside the work WKj using a lens, and a dot-like mark TC is formed there. As work WKj, besides glass, plastic,
Crystal glass, ceramic, or the like is used.

[0009]

However, according to the above-described recording method, in order to cause the laser beam to be incident on the work WKj and to proceed straight through the work WKj after the incidence,
It is required that the surface shape of the work WKj to be used is as simple as possible. In particular, since it is desirable that the surface on which the laser light is incident is flat, a rectangular parallelepiped work is used as the work WKj.

Incidentally, when the surface of the work WKj is a spherical surface or a free-form surface, the refraction angle of the laser light changes depending on the incident position and the incident angle of the laser light, and it is difficult to irradiate a predetermined position with the laser light. Becomes Further, by giving a correction value corresponding to the incident position and the incident angle, it is possible to irradiate the laser beam to a predetermined position, but such calculation of such a correction value requires a great deal of labor, and the apparatus is also required. It gets complicated.

Therefore, as described above, the work WK
When the surface of j is a plane, the work WK
A ridge line RS exists between the surfaces on the surface of j. In the ridge line RS, the normal vectors of the surfaces on both sides of the ridge line RS are discontinuous, so that the light rays emitted from the inside of the work WKj advance outside at a discontinuous refraction angle with the ridge line RS as a boundary.

Therefore, when the work WKj is observed from the outside, the ridge line RS becomes an observation break point, and a favorable observation state is greatly hindered. In particular, when the image recorded on the work WKj is the three-dimensional image FTj as described above, it is required to observe the entire circumference of the image. However, this observation breakpoint makes it impossible to observe the entire circumference. A big problem arises.

As described above, there is a problem that the optimum shape at the time of recording on the work WKj and the optimum shape at the time of observation are contradictory.

In order to obtain a good observation state, it is conceivable to rework the work WKj after recording the image to eliminate the ridge line RS. However, in such a case, much processing and labor are required for the processing steps for that, and polishing is required to increase the transparency of the surface.

The present invention has been made in view of the above problems, and provides an image observation apparatus capable of obtaining a good observation state regardless of the shape of a work (image recording object) and an observation jig used for the same. The purpose is to do.

[0016]

The apparatus according to the first aspect of the present invention has a three-dimensionally recorded internal device as shown in FIGS.
An image observation device 2 for observing a three-dimensional image FT, comprising: an image recording object (work) WK1 in which the three-dimensional image FT is recorded in a transparent solid material; and a hollow formed by a transparent material. A jig case 31 accommodating the image recording object WK1 in the chamber TK1, a refractive index similar to the refractive index of the image recording object WK1, and the hollow chamber T
K1 and a liquid LQ accommodated so that the image recording object WK1 is immersed therein.

In the apparatus according to the second aspect of the present invention, the jig case 31 has a refractive index close to the refractive index of the image recording object WK1, and the whole or a part of the outer surface thereof is a curved surface.

In the apparatus according to the third aspect of the invention, the refractive index Nl of the liquid LQ and the refractive index Nw of the image recording object WK1 satisfy the following equation: 0.9 <Nw / Nl <1.1. It is set as follows.

In the apparatus according to a fourth aspect of the present invention, the refractive index Nl of the liquid LQ is set between the refractive index Nw of the image recording object WK1 and the refractive index Nc of the jig case 31. .

In the apparatus according to a fifth aspect of the present invention, the three-dimensional image F is obtained from a specific point BS outside the image observation apparatus 2.
The above-mentioned 3 is formed into a shape in which distortion generated when T is observed is corrected.
A two-dimensional image FT is recorded.

An observation jig according to a sixth aspect of the present invention is an observation jig used for observing an image recording object WK1 in which a three-dimensional image FT is recorded inside a transparent solid material. A jig case 31 formed of a suitable material and provided with a hollow chamber TK1 for accommodating the image recording object WK1, and having a refractive index close to the refractive index of the image recording object WK1; The liquid LQ in which the image recording object WK1 is immersed.
And

A jig case according to a seventh aspect of the present invention is a jig case used for observing an image recording object WK1 in which a three-dimensional image FT is recorded inside a transparent solid material. A hollow chamber TK1 for receiving the image recording object WK1 is provided, and the hollow chamber TK1 is formed of the image recording object WK1.
Is formed so that the liquid LQ for immersing the image recording object WK1 can be stored when the liquid LQ is stored.

As a method of recording the three-dimensional image FT on the image recording object WK1, a method of optically or thermally recording using a laser beam or the like can be used. At this time, glass, crystal glass, plastic, ceramic, or another material is used as the material of the image recording object WK1. These materials are also used for the jig case 31.

[0024]

FIG. 1 is a perspective view of an image observation apparatus 2 according to a first embodiment of the present invention, and FIG. 2 is a sectional front view of the image observation apparatus 2.

In these figures, the image observation device 2
It is composed of a work WK1, which is an image recording object, a jig case 31, and a liquid LQ.

The work WK1 is made of a rectangular solid transparent solid material. Inside, a three-dimensional image FT1 is recorded by the recording method described in the section of the related art. As the material of the work WK1, glass, crystal glass, plastic, ceramic, and other materials are used.

The jig case 31 is formed in a hollow shape by a transparent material. That is, the jig case 31
It comprises a disc-shaped bottom 311, a cylindrical peripheral wall 312, and a disc-shaped top plate 313. Bottom 311 and peripheral wall 312
Is formed integrally, and then the top plate 313 is hermetically attached by heat welding or an adhesive. Further, the bottom portion 311 and the peripheral wall portion 312 may be formed separately from each other without being integrally formed, and then integrated by heat welding or an adhesive. Unlike the work WK1, the jig case 31 does not need to be processed by a laser beam, so that a jig case 31 having an arbitrary shape without a ridge can be easily manufactured.

A cylindrical hollow chamber TK1 is formed inside the jig case 31. Therefore, jig case 3
The inner peripheral surface of 1 is cylindrical, and the outer peripheral surface is also cylindrical. The work WK1 described above is accommodated in the hollow chamber TK1,
In addition, the liquid LQ is filled. Therefore, the work WK1 is immersed in the liquid LQ.

The refractive index Nl of the liquid and the refractive index Nw of the work WK1 are set so as to satisfy the following equation (1).

0.9 <Nw / Nl <1.1 (1) That is, the refractive index Nl of the liquid LQ is close to the refractive index Nw of the work WK1.

As described above, since the refractive indexes Nw and Nl of the work WK1 and the liquid LQ are close to each other, they are almost optically integrated with each other. Therefore, although the work WK1 is itself a rectangular parallelepiped, it is optically equivalent to a cylindrical shape by being integrated with the liquid LQ.

Therefore, when the three-dimensional image FT1 is observed from outside the image observation device 2, the ridge line R of the work WK1 is
S becomes invisible or almost inconspicuous. Therefore, the observation break point which has conventionally occurred due to the presence of the ridge line RS disappears, and a favorable observation state can be obtained over the entire circumference of the image observation device 2.

It is ideal that the refractive indices Nw and Nl are identical to each other. In this case, since the work WK1 and the liquid LQ are optically almost completely integrated, the ridge line RS is not observed at all. However, the observation breaks completely disappear. However, even if the refractive indices Nw and Nl are not exactly the same, the ridge line RS is almost inconspicuous at the time of observation and the observation break point is also substantially inconspicuous within the range of the above-described expression (1). The observation state is secured. Thus, a favorable observation state can be obtained regardless of the shape of the work WK1. Therefore, it is possible to select an optimum shape for recording as the work WK1.

As the material of the jig case 31, a material whose refractive index Nc is close to the refractive index Nw of the work WK1 is selected.

The refractive index Nl of the liquid LQ is set between the refractive index Nw of the work WK1 and the refractive index Nc of the jig case 31. That is, it is set so as to satisfy the following equation (2).

Nw <Nl <Nc (where Nw <Nc) Nc <Nl <Nw (where Nc <Nw) (2) Thus, the refractive index Nc of the jig case 31 is also determined. ,
By setting the refractive indexes to be close to the refractive indexes Nw and Nl, a better observation state can be obtained.

The three-dimensional image FT1 is slightly deformed and observed due to the refraction of the observation light on the outer surface of the jig case 31. However, by devising the shape of the outer surface of the jig case 31, for example, by forming it into a cylindrical shape as in the above-described first embodiment, the observation which is the biggest factor that hinders a favorable observation state is performed. The occurrence of a break will be eliminated.

Next, distortion due to refraction on the outer surface of the jig case 31 and its correction will be described.

FIG. 4 is a diagram for explaining how the dot trace TC (three-dimensional image FT) looks when the image observation device 2 is observed.

In FIG. 4, a three-dimensional image FT recorded on a work WK1 provided inside the image observation device 2 is shown.
Attention is paid to one trace TC1. When the trace TC1 is viewed from the observation point BS, the observer can see the trace TC1 at the position of the point TC1k due to refraction on the outer surface of the jig case 31. That is, the position of the image appears to be shifted by the distance EH1. In this case, the image appears to be enlarged.

In order to make the trace TC1 appear at the original position, the trace TC1 is taken into consideration in consideration of refraction of light.
May be recorded at the position of the point TC2. In that case,
The image data for recording is corrected so as to be shifted by the distance EH2. By recording a trace at the position of point TC2, such a trace TC2 is provided to the observer at point T2.
It looks like C2k. That is, the image of the trace TC1 is corrected.

As described above, when the three-dimensional image FT is recorded, the shape may be corrected in consideration of the deformation of the image at the time of observation. As described above, in order to correct the deformation of the image at the time of observation, the viewpoint (observation point) of the observer is set to a specific point (observation point BS in FIG. 4) in advance, and the jig case is set. Correction value for correction taking into account the angle of refraction of observation light in the shape of 31 (distance EH2 in the example of FIG. 4)
Is reflected in the image data for recording. By using such corrected image data, the work holding device 8
1, a first laser light source 82 and a second laser light source 83
And the like, and the corrected three-dimensional image FT is recorded.
By doing so, the corrected three-dimensional image F
T is optically corrected at the time of observation, and can be observed as a correct three-dimensional image FT without original distortion.

Depending on the shape of the outer surface of the jig case 31, deformation of the image due to refraction can also have the effect of enlarging the three-dimensional image FT.

Next, the image observation device 2B of the second embodiment
Will be described.

FIG. 3 is a perspective view of an image observation device 2B according to a second embodiment of the present invention.

In FIG. 3, the image observation device 2B includes a work WK2, which is an image recording object, a jig case 31B, and a liquid LQ.

Work WK2, liquid LQ, jig case 31
The material of B and its refractive index are the same as those in the first embodiment described above. In the second embodiment, the shape of the jig case 31B is different.

That is, the jig case 31B comprises a disc-shaped pedestal 321 and a case main body 322 hermetically attached to the pedestal 321 and having a shape lacking a part of a spherical surface. Therefore, a spherical hollow chamber TK2 is formed inside the jig case 31B. Therefore, jig case 3
The inner peripheral surface of 1B is spherical, and the outer peripheral surface is also spherical.
The work WK2 is accommodated in the hollow chamber TK2, and is filled with the liquid LQ. The work WK2 is immersed in the liquid LQ. Inside the work WK2, a three-dimensional image FT
2 is recorded.

In such an image observation device 2B,
Refractive indices Nw, Nl of work WK2 and liquid LQ
Are close to each other so that they are optically substantially integrated with each other. Therefore, although the work WK2 has a rectangular parallelepiped shape, it is optically equivalent to a spherical shape. Therefore, the three-dimensional image FT2 is displayed on the image observation device 2
When observed from the outside of B, the observation breakpoint conventionally caused by the presence of the ridge line RS disappears, and a favorable observation state is obtained over the entire circumference of the image observation device 2B. In particular, in this case, the entire circumference can be observed not only in the circumferential direction but also in all directions.

In the first and second embodiments described above, the shape of the work WK is cubic, pentagonal, hexagonal, octagonal, polygonal, pyramidal, cylindrical, elliptical, circular, conical, etc. Other shapes may be used. The outer peripheral portion of the work WK may contact the inner peripheral surface of the hollow chamber TK.

In the first and second embodiments described above, the method of recording the three-dimensional image FT on the work WK, the control contents and procedure at that time, the formation order of the trace TC, the work WK
The material, shape, dimensions, etc. of each part or the entire configuration, structure, material, shape, number, etc. of the image observation devices 2 and 2B are
It can be changed appropriately according to the spirit of the present invention.

[0052]

According to the present invention, a good observation state can be obtained regardless of the shape of the image recording object. Therefore, when a three-dimensional image is optically or thermally recorded, an optimal shape for recording can be selected as an image recording object (work).

According to the fifth aspect of the present invention, it is possible to observe a correct three-dimensional image without original distortion.

[Brief description of the drawings]

FIG. 1 is a perspective view of an image observation device according to a first embodiment of the present invention.

FIG. 2 is a sectional front view of the image observation device.

FIG. 3 is a perspective view of an image observation device according to a second embodiment of the present invention.

FIG. 4 is a diagram for explaining how a dot-like trace is seen and corrected by the image observation device.

FIG. 5 is a diagram illustrating an example of a three-dimensional image recording method.

FIG. 6 is a diagram illustrating an example of a three-dimensional image.

[Explanation of symbols]

 2, 2B Image observation device 31, 31B Jig case (observation jig) LQ Liquid (observation jig) WK, WK1, WK2 Work (image recording object) FT, FT1, FT2 Three-dimensional image TK, TK1, TK2 Hollow chamber

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Jin Hagimori 2-3-13 Azuchicho, Chuo-ku, Osaka-shi, Osaka Inside Osaka International Building Minolta Co., Ltd. (72) Inventor Kenichiro Yuki Azuchi-cho, Chuo-ku, Osaka-shi, Osaka 2-3-13, Osaka International Building Minolta Co., Ltd. (72) Inventor Fumiya Yagi 2-3-13, Azuchicho, Chuo-ku, Osaka-shi, Osaka Osaka International Building Minolta Co., Ltd. (72) Naoya Suzuki, Osaka 2-13-13 Azuchicho, Chuo-ku, Osaka City, Osaka International Building Minolta Co., Ltd. (72) Inventor Takashi Kondo 2-3-13 Azuchicho, Chuo-ku, Osaka City, Osaka F-term in Osaka International Building Minolta Co., Ltd. (Reference) 3E067 AA03 AA11 AB99 BA01A BB08A BB14A CA11 EE21 FA01 FC01 GA23 GD10

Claims (7)

[Claims] 1. An image observation apparatus for observing a three-dimensional image recorded therein, comprising: an image recording object in which the three-dimensional image is recorded inside a transparent solid material; A jig case accommodating the image recording object in the formed hollow chamber, having a refractive index close to the refractive index of the image recording object, and being accommodated in the hollow chamber so that the image recording object is immersed therein. An image observation device, comprising: a liquid; 2. The image observation apparatus according to claim 1, wherein the jig case has a refractive index close to a refractive index of the image recording object, and all or a part of an outer surface thereof is a curved surface. 3. The refractive index Nl of the liquid and the refractive index Nw of the image recording object are set so as to satisfy the following equation: 0.9 <Nw / Nl <1.1. The image observation device according to the above. 4. The image observation apparatus according to claim 3, wherein a refractive index Nl of the liquid is set between a refractive index Nw of the image recording object and a refractive index Nc of the jig case. 5. The image observation apparatus according to claim 1, wherein the three-dimensional image is recorded in a shape in which distortion generated when the three-dimensional image is observed from a specific point outside the image observation apparatus is corrected. . 6. An observation jig used for observing an image recording object in which a three-dimensional image is recorded in a transparent solid material, wherein the observation jig is formed of a transparent material and accommodates the image recording object. A jig case provided with a hollow chamber for storing the image recording object, the liquid having a refractive index close to the refractive index of the image recording object, and being accommodated in the hollow chamber so as to be immersed therein. An observation jig for use in an image observation apparatus, comprising: 7. A jig case used for observing an image recording object in which a three-dimensional image is recorded inside a transparent solid material, wherein the jig case is formed of a transparent material. A hollow chamber for containing the image recording object is provided, and the hollow chamber is formed so as to be able to contain a liquid for immersing the image recording object. A jig case for an image recording object.