JP2586716B2 - XYZ plotter and recording medium - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention provides a method for obtaining a hard copy of a three-dimensional image.
The present invention relates to an XYZ plotter, for example, a computer output device, a CAD output device used in the field of mechanical design, creation of a hard copy of a medical three-dimensional image, and a three-dimensional image in the field of design. It is widely used for making hard copies, making hard copies of three-dimensional images in the study of molecular structures, and various other uses.

[Prior art]

The display of a three-dimensional graph when a multivariable function is handled by a computer, or the display of a three-dimensional image when a three-dimensional shape is designed by a computer is performed by outputting three-dimensional image information from the computer. Following the proposal of outputting a soft copy of an image (for example, Japanese Patent Application Laid-Open No. 56-69612, etc.), there has been proposed an output device capable of obtaining a three-dimensional image as a hard copy ( For example, JP-A-64-24243, JP-B-06-35234, JP-A-64-25141, JP-B-06-43159, and others. FIG. 7 is a perspective view showing a schematic configuration of an XYZ plotter disclosed in Japanese Patent Application Laid-Open No. 64-24243, and FIG. 8 is an XYZ plotter disclosed in Japanese Patent Application Laid-Open No. 64-25141. It is a perspective view which shows schematic structure of. In FIGS. 7 and 8, MB is a machine base, and a fly-eye lens plate (a compound eye of an insect composed of a large number of single eyes) is provided on the machine MB of the XYZ plotter shown in FIG. Because of the similarity, a lens having a configuration that is commonly referred to as a compound eye lens, a fly-eye lens plate, or the like) is arranged in such a manner that the FEL and the fly-eye lens plate FEL are located at the focal plane. The arranged photosensitive recording member PSM is installed, and
On the base MB of the XYZ plotter shown in FIG. 8, a cylindrical convex lens array plate (a configuration commonly referred to as a lenticular plate) corresponding to a two-dimensionally deformed fly's eye lens plate is provided. Lens) The CLA is set so that the surface of the photosensitive recording member PSM installed on its focal plane coincides with the XY plane in the XYZ rectangular coordinate system, and the direction of the cylindrical axis of the cylindrical / convex lens is the XYZ rectangular coordinate. Provided so as to be parallel to the Y axis in the system,
A photosensitive recording member PSM arranged in such a manner as to be located at the focal plane of the cylindrical convex lens array plate CLA is provided. As the photosensitive recording member PSM, for example, a photographic dry plate or a photographic film provided with a silver salt photosensitive material film, or another photosensitive material film is used. RM is the overall code of the recording medium provided with the photosensitive recording member PSM. The XYZ plotter shown in FIG. 7 and FIG. 8 is provided with the shape of the three-dimensional image to be recorded in the three-dimensional space in front of the fly-eye lens plate FEL or the cylindrical convex lens array plate CLA. It is configured to include a light source generating portion that can form a light source PSI to be displaced and driven at a corresponding position, and is used in a state where the entire configuration is housed in a dark box. The light source generating section for generating the light source PSI is driven to be displaced by a driving device DRA provided in the machine base MB. The driving device DRA includes an X-axis direction transfer body Fx that is transferred in the X-axis direction along a rail member Rx provided so as to extend in the X-axis direction in the XYZ orthogonal coordinate system by the drive rotation of the stepping motor Mx. A rail member fixed to the X-direction transfer body Fx and provided so as to extend in the Z-axis direction in the XYZ orthogonal coordinate system.
Along Rz, Z is driven by the rotation of the stepping motor Mz.
A Z-axis transfer body Fz transferred in the axial direction;
A rail member fixed to the transport member Fz in the axial direction and provided so as to extend in the Y-axis direction in the XYZ orthogonal coordinate system.
Y by the drive rotation of the stepping motor My along Ry
And a transfer body Fyb in the Y-axis direction which is transferred in the axial direction. Therefore, the driving device DRA of the light source in the XYZ plotter shown in FIG. 7 and FIG.
Stepping motors Mx and M in Fx, Fyb and Fz
When y and Mz are rotated in response to a drive signal supplied from a computer, the light source generator fixed to the Y-axis direction transfer body Fyb is displaced and generated by the light source generator. The light source PSI is a fly-eye lens plate FEL (7th
Figure) or cylindrical / convex lens / array plate CLA
In a predetermined range in the three-dimensional space in front of (FIG. 8), the shape of the three-dimensional image to be recorded is displayed as a continuous linear light locus, Alternatively, the shape of a three-dimensional image to be recorded is displayed by an array of light spots. The light source PSI in the XYZ plotter shown in FIG. 7 is formed by condensing the light emitted from the light source PS by a lens Lc, and the light source PSI in the XYZ plotter shown in FIG. A light beam having a fan-shaped cross section emitted from a light source SL condensed and formed by the CL is converged by a lens Lc to form a converging point PSI. Here, the configuration of the optical system in the XYZ plotter shown in FIG. The light source SL formed on the transfer body Fyb of the XYZ plotter shown in FIG.
For example, light emitted from the laser light source PS is focused by the cylindrical lens CL, and the above-described cylindrical lens CL is used.
A light source configured to emit a divergent light beam having a fan-shaped cross-sectional shape such that the light source diverges only in the X-axis direction in the XY plane from the converging point focused in the light source.
The divergent light beam radiated from the SL is focused by the lens Lc and forms an image of the light source SL on the converging point PSI. The fan-shaped luminous flux emitted from the light source SL is converted into a lens Lc.
The light source PSI of the light beam PL that diverges in a fan shape only in the X-axis direction only depends on the driving displacement of the transport body Fyb in the Y-axis direction. Although the plate CLA can be driven to be displaced to any position within a predetermined range in the three-dimensional space where the plate CLA exists, the above-mentioned converging point PSI is a new light source PSI and a divergent light beam from it. Is designed to irradiate the cylindrical / convex lens / array plate CLA. Since the cylindrical convex lens array plate CLA does not have a lens function in the cylindrical axis direction of the cylindrical convex lens (the direction of the Y axis in each drawing), even if the cylindrical convex lens array plate CLA is used, Although the parallax information in the cylindrical axis direction of the convex lens (the direction of the Y axis in each drawing) cannot be recorded on the photosensitive recording member PSM, the XYZ plotter shown in FIG. 8 uses the cylindrical convex lens array plate CLA. The three-dimensional image drawn by the displacement of the light source PSI in the existing three-dimensional space can be recorded as a three-dimensional image on the photosensitive recording member PSM disposed on the focal plane of the cylindrical convex lens array plate CLA. In order to be able to do the lens function in the cylindrical convex lens array plate CLA which is arranged to have the focal plane in the XY plane A luminous flux having a cross-sectional shape that does not expand in the cylindrical axis direction of the cylindrical convex lens (not shown) (the direction of the Y axis in each drawing) but spreads in a fan shape only in the X axis direction is emitted. The light source PSI is used to displace the light source PSI according to the three-dimensional image to be recorded in the three-dimensional space where the cylindrical convex lens array plate CLA exists. Therefore, the transfer body Fyb in the Y direction is located at a position separated upward in the space in front of the cylindrical convex lens array plate CLA, and the condensing point PSI serving as the new light source is set in the cylindrical convex lens array. When located above the plate CLA, the light diverging from the above-mentioned condensing point PSI is a cylindrical / convex lens / array plate CLA.
Are focused on each cylindrical / convex lens in the photosensitive recording member PSM installed on the focal plane of the cylindrical / convex lens / array plate CLA. An image of a light spot (light source) PSI can be formed and recorded. In the XYZ plotter shown in FIG. 8, the transfer body Fyb in the Y direction is located at a lower position in the space in front of the cylindrical convex lens array plate CLA, and the condensing point PSI serving as the new light source is located at the lower position. , Cylindrical, convex lens,
When located below the position of the array plate CLA, that is, the cylindrical / convex lens / array plate CLA is installed closer to the lens Lc than the position of the converging point PSI formed by the focusing operation of the light beam by the lens Lc. If there is no cylindrical convex lens / array plate CLA, the focal point (PS
A light beam converging at a virtual light converging point PSI 'generated at the position I') (a light beam having the same direction as the light beam diverging from the virtual light converging point PSI 'described above) is formed by a cylindrical convex lens array. For each cylindrical / convex lens on the plate CLA, the information is recorded on a photosensitive recording member PSM provided on the focal plane of the cylindrical / convex lens / array plate CLA. In FIG. 9, VP is a viewpoint which is used to show the recording operation of the XYZ plotter of the embodiment shown in FIG.
VP is a distance of height D from the surface of the cylindrical convex lens array CLA, and point P in FIG. 9 is the position of the light source PSI ', and this P point is the cylindrical convex lens array CLA. The distance from the plane is −d, the distance in the height direction from the viewpoint VP is at the position (D−d), and the point P is in the Y-axis direction between the point P and the viewpoint VP. If the distance is 1 and the distance in the Y-axis direction between the position i where the image of the light source existing at the point P is to be formed and the viewpoint VP is L, the image of the light source at the point P is formed and recorded. Position i
The distance L in the Y-axis direction from the viewpoint VP to the following equation is obtained from the following equation (1) from the similarity of a triangle: D / L = (D−d) / l, L = (D · l) / (D− d)... (1) Therefore, in the XYZ plotter shown in FIG.
From (PSI '), a fan-shaped luminous flux diverging only in the X-axis direction and parallel to the X-Z plane is radiated, and the light source PSI (PSI') is converted to a cylindrical convex lens array CLA. When displacing within a predetermined range in an existing three-dimensional space, a plane including a linear viewing area to which both eyes should be placed at the time of reproduction and a light source PSI (PSI ') at that time is a cylindrical convex lens. A relationship as shown in equation (1) with respect to the information in the Y-axis direction so that recording is performed on a portion of the photosensitive recording member PSM corresponding to a substantially linear region crossing the surface of the array CLA. Is corrected so that recording is performed. As described above, the driving device DRA of the light source in the XYZ plotter shown in FIGS. 7 and 8 is provided with the transfer members Fx and F in the X, Y and Z axis directions.
Stepping motors Mx, My, Mz for yb, Fz
Is rotated in response to a drive signal supplied from the computer, the displacement of the light source generator fixed to the transfer member Fyb in the Y-axis direction displaces the light source PSI generated by the light source generator. Is a fly's eye lens plate FEL (7th
Figure) or cylindrical / convex lens / array plate CLA
In a predetermined range in a three-dimensional space in front of (FIG. 8), the shape of a three-dimensional image to be recorded is displayed as a continuous linear light locus. Alternatively, the light emission state of the light source PSI (PSI ') is controlled by a computer so that the shape of a three-dimensional image to be recorded is displayed by an array of light spots, so that a fly's eye Lens plate FEL (Fig. 7) or cylindrical / convex lens / array plate CLA (Fig. 8)
Within a predetermined range in a three-dimensional space where is present, the shape of the three-dimensional image to be recorded is displayed as a continuous linear light locus, The shape of the three-dimensional image to be obtained is displayed by the arrangement of the light spots. CLA (8th
In the three-dimensional space where the fly-eye lens plate FEL (FIG. 7) or the cylindrical convex lens array plate CLA (FIG. 8) recorded on the photosensitive recording member PSM installed on the focal plane of FIG. If the photosensitive recording member PSM is a positive type, the light source image is developed in such a manner that only the image portion of the light source becomes transparent and the other portions become black by developing the photosensitive recording member PSM. Because

[Problems to be solved by the invention]

By the way, in the above-mentioned conventional XYZ plotter, when three-dimensional image information is recorded on a photosensitive recording member, it is necessary to develop the three-dimensional image information, so that the operation is complicated and the recorded content is erased. The same recording medium cannot be used repeatedly for recording other information because recording is performed using an irreversible recording medium that cannot be used. Done 3
Since the direction in which the three-dimensional image is observed during reproduction is the same as the direction of the recording light (writing light) during recording, the three-dimensional image displayed by the recording device cannot be seen during recording. However, the recording operation is continued without noticing that the displayed three-dimensional image is defective or unnecessary, so that time is wasted.

[Means for Solving the Problems]

The present invention provides a means for three-dimensionally displacing a point light source located at a position corresponding to a shape of a three-dimensional image to be recorded, and a fly eye on a recording medium for emitting light emitted from the point light source. An XYZ plotter in which an image is formed on a thermal writing type recording material layer provided on a focal plane of a lens plate, and the locus of the point light source is recorded on the thermal writing type recording material layer in the recording medium. The light from a point light source in the above-described recording medium is obtained by using a recording medium having a configuration in which a fly-eye lens plate is provided symmetrically on the front and back surfaces of a recording material layer of the thermal writing type. An XYZ plotter comprising means for observing the recorded content of a thermally rewritable recording material layer on a recording medium from a surface opposite to a surface on which light is incident, and a three-dimensional to be recorded Image shape and corresponding position , Showed no divergence with respect to the cylindrical axis of the cylindrical-convex lens that does not exhibit a lens function in cylindrical-convex lens array plate,
Means for three-dimensionally displacing a point light source that emits a light beam having a cross-sectional shape that expands in a fan shape only in a direction perpendicular to the cylindrical axis, and a recording medium that emits light emitted from the point light source Is formed on the thermal writing type recording material layer provided on the focal plane of the cylindrical convex lens array plate, and the locus of the point light source is recorded on the thermal writing type recording material layer of the recording medium. XY
Using a Z plotter having a configuration in which cylindrical recording lenses, convex lenses, and array plates are provided symmetrically on both front and rear surfaces of a recording material layer of the thermal writing type as the above-described recording medium, from a point light source in the recording medium described above. An XYZ plotter comprising means for observing the recorded content of a thermal writing type recording material layer on a recording medium from a surface opposite to a surface on which light is incident, and an erasable thermal writing type A fly-eye lens plate or a cylindrical / convex lens / array plate is provided on one surface of the recording material layer, and the other surface is provided with a black matte surface.

[Action]

A recording medium in which a fly-eye lens plate or a cylindrical convex lens array plate is provided symmetrically on the front and back surfaces of a recording material layer of a recording medium, or a fly-eye lens plate or a cylindrical convex lens on the front side. Since recording is performed using a recording medium provided with an array plate and provided with a black matte surface on the back side, the recording is performed in a state where recording is performed from the front side of the recording medium. Because the three-dimensional image can be observed from the back side of the recording medium, the recording can be restarted immediately when the three-dimensional image displayed at the time of recording is found to be defective or unnecessary, and can be erased. Since the material layer is used, the same recording medium can be used repeatedly.

【Example】

Hereinafter, specific contents of the XYZ plotter of the present invention will be described in detail with reference to the accompanying drawings. 1 and 2 are perspective views showing a schematic configuration of an XYZ plotter according to the present invention.
5 and 6 are side sectional views of the recording medium, and FIGS. 5 and 6 are perspective views of the recording medium. The XYZ plotter shown in FIG. 1 is used for recording three-dimensional image information to be recorded on a recording medium RM including a fly-eye lens.
FIG. 2 is a perspective view of a Z plotter, and an XYZ plotter shown in FIG. 2 records three-dimensional image information to be recorded on a recording medium RM including a cylindrical convex lens array plate. It is a perspective view of the XYZ plotter used when making it perform, and B is a container of the XYZ plotter in each figure. On one side surface Bf of the container B in the XYZ plotter shown in FIGS. 1 and 2, the front side of the recording medium RM is exposed inside the container B, and the back side of the recording medium RM is outside the container B. An opening is provided such that the recording medium RM is mounted on the container B in such a manner as to be exposed. In the XYZ plotters shown in FIGS. 1 and 2, respectively, the openings provided on the side surface Bf of the container B include:
Each has a recording medium RM mounted thereon. In the container B shown in FIG. 1, as described above with reference to FIG. 7.
An XYZ plotter having substantially the same configuration as the XYZ plotter is built in, and a container B shown in FIG. 2 has an XYZ plotter having the same configuration as the XYZ plotter described above with reference to FIG. It is assumed that a plotter is built in, and the fact that an XYZ plotter is built in the container B is shown by a dotted-line figure in FIGS. 1 and 2. In FIGS. 1 and 2, the driving device DRA and the stepping motor M shown in the XYZ plotter of FIGS. 7 and 8 are shown.
The description of x, My, Mz, etc. is omitted. FIG. 3 shows a recording medium RM used in the XYZ plotter shown in FIG.
A recording medium RM having a configuration in which fly-eye lens plates EFLf and EFLb are provided symmetrically on both front and back surfaces, and a recording medium RM used in the XYZ plotter shown in FIG. FIG. 4 is a longitudinal sectional side view commonly showing a cross-sectional shape of a recording medium RM having a configuration in which cylindrical / convex lens / array plates CLAf and CLFb are provided symmetrically on both front and back surfaces of a recording material layer 3; 2 is a spacer, and Et1 and Et2 are transparent electrodes. The fly-eye lens plates FELf and FELb have a small diameter, for example, a diameter of 0.5 mm to 0.07 mm, and have a configuration in which a large number of single-lens lenses with a short focal length are arranged and collected, for example, A lens formed as a molded product made of transparent plastics can be used (for example, as a fly's eye lens plate, two cylindrical convex lens arrays may be used, and each cylindrical lens in each of the cylindrical convex lens arrays may be used). A lens which is arranged in series in the optical path in a state where the lens axes are orthogonal to each other to form a fly's eye lens plate may be used). Further, the above-mentioned cylindrical convex lens array plate CL
Af, CLAb is a configuration mode in which a number of cylindrical convex lenses are arranged on a plane such that their cylindrical axes are parallel to each other, and the lens pitch is usually 0.1 mm, for example. It is made to be about 0.5mm thick and the thickness is such that the focal plane coincides with the back side. (The fly-eye lens plate has many eyes in both the vertical and horizontal directions. Since the arrangement is arranged, the stereoscopic image can be sensed even when the left and right eyes move in either the left or right direction or the up and down direction, but as described above, the cylindrical convex lens array plate has a large number of The cylindrical and convex lenses are arranged on a plane such that their cylindrical axes are parallel to each other. The cylindrical lens has no function in the direction of the cylindrical axis. Convexity Although the parallax information in the cylinder axis direction cannot be recorded depending on the zoom array plate, the minimum required stereoscopic effect due to convergence and binocular parallax based on the fact that the human eyes are arranged on the left and right The recording of stereoscopic information using a cylindrical convex lens array plate is performed because of its sufficient size and the fact that the cylindrical convex lens array plate is easier to manufacture than the fly-eye lens plate. XYZ
This can contribute to simplifying the configuration of the plotter). The recording medium RM having the configuration in which the longitudinal side view is shown in FIG. 3 is used on both the front and back surfaces of the recording medium RM.
On the flat surface side of the two fly-eye lens plates EFLf, EFLb (or two cylindrical convex lens array plates CLAf, CLAb), a transparent electrode Et1, made of a thin film of indium oxide, for example, is provided.
Et2 is formed by applying a sputtering method or a vapor deposition method, for example, and then the transparent electrodes Et1 on the two fly-eye lens plates EFLf, EFLb (or the two cylindrical convex lens array plates CLAf, CLAb) described above. , Et2 facing each other, spacers 1 and 2 are inserted between the peripheral portions, and an erasable heat-write type recording material is injected into the gap formed by the use of the spacers 1 and 2 to erase the heat. A writable recording material layer 3 is formed. As the erasable thermal writing type recording material constituting the erasable thermal writing type recording material layer 3, for example, a nematic / cholesteric mixed liquid crystal can be used. Nematic as the erasable thermal writing type recording material layer 3
When the cholesteric mixed liquid crystal is used, the irradiated portion 4 of the light from the light source becomes cloudy due to a rise in temperature, and recording is performed. In addition, several kilohertz is transmitted between the transparent electrodes Et1 and Et2 via the lines l1 and l2. By applying an AC voltage of several tens of volts, the nematic / cholesteric mixed liquid crystal between the transparent electrodes Et1 and Et2 becomes transparent and the recorded contents are erased. Recording of information on the recording medium RM shown in FIG.
In the state where no voltage is applied between the transparent electrodes Et1 and Et2, the light source PSI of the XYZ plotter provided in the container B of the XYZ plotter
The recording light (thick arrow in FIG. 3) from the recording medium RM (see FIG. 7 and FIG. 8) is used as a fly-eye lens plate EFLf (or a cylindrical convex lens array) in the portion of the XYZ plotter in the container B. This is performed by making the light incident on the plate CLAf). The above-mentioned recording light forms an image on the nematic / cholesteric mixed liquid crystal constituting the erasable heat-writable recording material layer 3 of the recording medium RM, and the nematic / cholesteric portion of the portion where the temperature rises is formed.
The cholesteric mixed liquid crystal becomes cloudy. Therefore, the lower part of the recording medium RM shown in FIG. 3 is located outside the container from the opening of the side surface Bf of the container B of the XYZ plotter.
When an observer observes from the fly-eye lens plate EFLb (or the cylindrical / convex lens / array plate CLAb) of the recording medium RM which is projected outside the container from the opening of the side surface Bf of the container B of the Z plotter, Since the observer can see the figure written by the XYZ plotter, the observer can easily know during the recording operation whether or not there is an error in the written figure. The figure observed by the observer is XYZ
Since the three-dimensional image displayed in the air by the light source PSI of the plotter is turned upside down with respect to the recording medium RM, the three-dimensional image displayed in the air by the light source PSI of the XYZ plotter is recorded on the recording medium RM. If it is determined in advance to be a symmetrical inverted figure, the observer can recognize the correct figure. A recording medium RM using an erasable liquid crystal, in which the erasable thermal rewritable recording material constituting the erasable thermal rewritable recording material layer 3 in the recording medium RM, for example, a nematic / cholesteric mixed liquid crystal, That is, since a reversible recording medium RM is used, if an error is found in an image being recorded, a line l is formed between the transparent electrodes Et1 and Et2 of the recording medium RM.
After erasing the recorded content by applying an AC voltage of several tens of volts at several kilohertz through 1, l2, it is possible to re-record a new image as many times as possible on the same recording medium RM. Can be used as a soft copy. When a photosensitive recording material exhibiting a threshold is used as a recording material constituting the erasable heat-writable recording layer 3 in the recording medium RM, the surrounding area is within a brightness range equal to or lower than the threshold of the recording medium. Observations are also possible. The recording medium described so far is a recording medium having a configuration in which a fly-eye lens plate or a cylindrical convex lens array plate is provided symmetrically on both front and back surfaces of an erasable heat-write type recording material layer. Next, a recording medium in which a fly-eye lens plate or a cylindrical convex lens array plate is provided only on one side of the erasable thermal writing type recording material layer, that is, recording is performed in the same manner as the recording medium described above. The recording medium according to the embodiment of the recording medium of the present invention has an advantage that when the recording content of the medium becomes unnecessary, the recording material layer of the thermal writing type is erased and the same recording medium can be used repeatedly. This will be described with reference to FIGS. First, FIG. 4 shows a recording medium RM having an erasable thermal writing type recording layer 3 and usable in the XYZ plotter shown in FIG. 1, that is, a recording medium having a fly-eye lens plate EFLf. An RM (a perspective view is shown in FIG. 5) and a recording medium RM having an erasable heat-write type recording layer 3 and used in the XYZ plotter shown in FIG. 2, ie, a cylindrical convex lens FIG. 4 is a longitudinal sectional side view commonly showing a cross-sectional shape with a recording medium RM having a configuration provided with an array plate CLA (a perspective view is shown in FIG. 6); Is a spacer, Et1 and Et2 are transparent electrodes, 3 is an erasable thermal writing type recording layer, 5 is a transparent substrate, 6 is a light absorbing layer (for example, a black paint layer), 6a is a matting layer, and the recording medium RM Fly-eye lens plate FE used in the construction of
As the L, the cylindrical lens, the convex lens, the array plate CLA, and the like, those having the configuration described above with reference to FIG. 3 are used. The recording medium RM having the configuration shown in FIGS. 5 and 6 as shown in the longitudinal side view in FIG.
Is a single fly-eye lens plate EFL (or one cylindrical convex lens) used for one surface of the recording medium RM.
A transparent electrode Et1 made of, for example, a thin film of indium oxide is formed on the flat surface side of the array plate CLA) by applying, for example, a sputtering method or an evaporation method, and the flat electrode side of the transparent substrate 5 is made of, for example, indium oxide. The transparent electrode Et2 of a thin film is formed by applying a sputtering method or a vapor deposition method, for example, and the transparent electrode Et2 of the one fly-eye lens plate EFL (or one cylindrical convex lens array plate CLA) described above is formed.
The spacers 1 and 2 are inserted between the peripheral parts with the transparent electrode Et2 of the transparent substrate 5 facing t1 and the gap formed by the use of the spacers 1 and 2 has an erasable thermal writing type. (For example, a nematic / cholesteric mixed liquid crystal) is injected to form a thermally writable recording material layer 3. The matte layer 6a and the light absorbing layer (for example, a black paint layer) 6 formed on one surface of the transparent substrate 5 may be configured in advance on the transparent substrate 5. In the recording medium RM shown in FIGS. 4 to 6, when the erasable heat-write type recording material layer 3 is constituted by using a nematic / cholesteric mixed liquid crystal, a light source is used. Is formed on the erasable thermal writing type recording material layer 3, the temperature of the light imaging portion 4 in the erasable thermal writing type recording material layer 3 rises, and the portion becomes cloudy. The recording is performed, and the transparent electrode Et1,
By applying an AC voltage of several tens of volts at several kilohertz between Et2 via lines l1 and l2, the nematic / cholesteric mixed liquid crystal between both transparent electrodes Et1 and Et2 becomes transparent and the recorded contents are erased. . Therefore, in the case of the recording medium RM shown in FIGS. 4 to 6 as well, when the inside of the recording becomes unnecessary, the same recording medium is repeatedly erased after erasing the recorded contents of the thermal writing type recording material layer. The advantage is that it can be used. The recording of information on the recording medium RM shown in FIGS.
In the state where no voltage is applied between the transparent electrodes Et1 and Et2 of the recording medium RM, recording light (see FIG. 7 and FIG. 8) from the light source PSI of the XYZ plotter provided in the container B of the XYZ plotter (see FIGS. 7 and 8). A thick arrow in the figure is incident on the fly-eye lens plate EFL (or the cylindrical / convex lens / array plate CLA) in the portion of the recording medium RM inside the container B of the XYZ plotter. The above-described recording light forms an image on the nematic / cholesteric mixed liquid crystal constituting the erasable heat-writable recording material layer 3 in the recording medium RM, and the nematic / cholesteric mixed liquid crystal in a portion where the temperature rises becomes cloudy. become. When the reproduction light is incident on the recording medium RM on which the three-dimensional image to be recorded by the XYZ plotter has been recorded, the three-dimensional image drawn by a white line on a black background is reproduced from the recording medium RM. . When a nematic liquid crystal that becomes transparent when heated is used as the erasable thermal writing type recording material constituting the thermal writing type recording material layer 3 in the recording medium RM, a white background is obtained as a reproduced image. To obtain a three-dimensional image with black lines.

【The invention's effect】

As is apparent from the detailed description above, in the XYZ plotter of the present invention, a fly-eye lens plate, or a cylindrical / convex lens / symmetrical lens is provided symmetrically on both front and back surfaces of a erasable heat-recordable recording material layer as a recording medium. A recording medium having a configuration in which an array plate is provided, or a fly-eye lens plate or a cylindrical convex lens array plate is provided on the front side,
When recording is performed from the front side of the recording medium using a recording medium having a black matte surface on the back side, a three-dimensional image to be recorded can be observed from the back side of the recording medium. Therefore, when the three-dimensional image displayed at the time of recording is found to be incomplete or unnecessary, the recording can be restarted immediately after erasing the recorded contents up to that point. Even if a recording medium having a configuration in which a fly-eye lens plate or a cylindrical / convex lens / array plate is provided on only one side of a heat-writing type recording material layer is used, the recorded contents thereof are unnecessary. In such a case, the same recording medium can be repeatedly used after erasing the recorded contents of the thermal writing type recording material layer. According to the present invention, the conventional problems can be solved well.

[Brief description of the drawings]

1 and 2 are perspective views showing a schematic configuration of the XYZ plotter of the present invention, FIGS. 3 and 4 are side sectional views of a recording medium, and FIGS. 5 and 6 are perspective views of the recording medium. FIGS. 7 to 9 are diagrams for explaining the configuration and operation principle of the XYZ plotter. MB: Machine stand, FEL, FELf, FELb ... Fly-eye lens plate, CLA, C
LAf, CLAb …… Cylindrical, convex lens, array plate, RM
…… Recording medium, PSM …… Photosensitive recording member, PSI, SL …… Light source, DRA …… Drive device, Mx, My, Mz …… Stepping motor, Rx, Ry, Rz… Rail member, Fx, Fyb, Fz ... Transfer, L
c ... Lens, CL ... Cylindrical lens, Et1, Et2 ...
... Transparent electrodes, 1,2 ... Spacers, 3 ... Thermal recording material layer, 5 ... Transparent substrate, 6 ... Light absorbing layer, 6a ... Matting layer,

Continuation of the front page (56) References JP-A-60-222839 (JP, A) JP-A 64-57255 (JP, A) JP-A 64-54437 (JP, A) JP-A-3-116130 (JP) JP-A-48-35829 (JP, A) JP-A-57-161738 (JP, A) JP-A-47-19834 (JP, A) JP-A-2-226139 (JP, A) 60-60756 (JP, U) Japanese Utility Model Showa 51-13339 (JP, U) Japanese Utility Model Showa 51-13340 (JP, U) Japanese Utility Model Showa 51-85697 (JP, U) Japanese Patent Publication 48-21290 (JP, U B1) JP 55-728 (JP, B1) JP 6-35233 (JP, B2) JP 6-33034 (JP, B2) JP 6-43160 (JP, B2) JP 6 -33035 (JP, B2) JP 7-101259 (JP, B2) JP 6-43159 (JP, B2) JP 6-35234 (JP, B2)

Claims (6)

(57) [Claims] 1. A means for three-dimensionally displacing a point light source located at a position corresponding to the shape of a three-dimensional image to be recorded, and transmitting light emitted from the point light source to a fly on a recording medium. An image is formed on the thermal writing type recording material layer provided on the focal plane of the eye lens plate, and the locus of the point light source is recorded on the thermal writing type recording material layer in the recording medium. An XYZ plotter having a configuration in which a fly-eye lens plate is provided symmetrically on both front and back surfaces of a heat-writable recording material layer as the above-described recording medium, using a point light source in the recording medium described above. An XYZ plotter comprising means for observing the recorded contents of a thermally rewritable recording material layer on a recording medium from a surface opposite to a surface on which light is incident 2. A cylindrical convex lens which does not exhibit a lens function in a cylindrical convex lens array plate at a position corresponding to a shape of a three-dimensional image to be recorded does not show an expansion in a cylindrical axis direction of the cylindrical convex lens. Means for three-dimensionally displacing a point light source that emits a light beam having a cross-sectional shape that spreads in a fan shape only in a direction orthogonal to the cylindrical axis, and records light emitted from the point light source. An image is formed on the thermal writing type recording material layer provided on the focal plane of the cylindrical convex lens array plate in the medium, and the locus of the point light source is recorded on the thermal writing type recording material layer in the recording medium. An XYZ plotter, wherein the recording medium includes a cylindrical member, a convex lens, and a symmetrical lens on both front and back surfaces of a recording material layer of a thermal writing type.
The recording content of the thermal writing type recording material layer in the recording medium from the surface opposite to the surface on which the light from the point light source is incident on the recording medium using the configuration having the array plate. XY equipped with means for observing
Z plotter 3. A recording medium in which a fly-eye lens plate is provided on one surface of a thermal writing type recording material layer and the other surface is a black matte surface. 4. A recording medium comprising: a thermal writing type recording material layer having a cylindrical convex lens array plate on one surface and a black matte surface on the other surface. 5. The recording medium according to claim 3, wherein a liquid crystal is used as the thermal writing type recording material. 6. The recording medium according to claim 3, wherein an erasable material is used as the thermal writing type recording material.