JPH0452042Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an apparatus used in an optical modeling method for producing a cured body having a desired shape by irradiating a photocurable resin with a light beam. Specifically, the present invention relates to an optical modeling device configured to irradiate light from a light-transmitting window provided in a container toward a photocurable resin inside the container.

[Prior art] A photocurable resin is irradiated with a light beam to cure the irradiated portion, and this cured portion is continued in the horizontal direction, and a photocurable resin is further supplied above it and cured in the same manner. An optical modeling method in which the cured body is made to continue in the vertical direction by repeating this process to produce a cured body in the desired shape was developed in JP-A-Sho.
It is publicly known from No. 60-247515, No. 62-35966, No. 62-101408, etc. It is also known to use a mask instead of scanning the beam.

A device for carrying out such an optical modeling method includes a container having a light-transmitting window on the bottom or side surface, a device for irradiating light into the container through the light-transmitting window, and a device for irradiating light into the container through the light-transmitting window, and a container that is separated from the light-transmitting window in the container. Some devices have a base that is movable in one direction.

[Problem to be solved by the invention] In this type of device, a considerable proportion of the light irradiated from the light irradiation device toward the photocurable resin in the container is reflected by the surface of the transparent window. I was tired of losing my job.

[Means for Solving the Problems] The optical modeling device of the present invention irradiates light from a light-transmitting window toward a photocurable resin in a container, and forms a photocurable resin on a base surface in the container or a cured product thereon. The optical modeling apparatus for forming a cured product is characterized in that at least one surface of the light-transmitting window is coated with a non-reflective coating.

[Operation] In the device of the present invention, reflection of light on the surface of the transparent window is reduced, and energy loss of light is reduced.

[Embodiment] FIG. 1 is a sectional view showing the configuration of an embodiment of the device of the present invention.

A photocurable resin 12 is housed in the container 11 . A transparent window 13 made of a transparent plate such as quartz glass with non-reflection coating on both sides is provided on the bottom of the container 11, and a light beam 14 is directed toward the transparent window 13. , a light emitting section 15 with a built-in lens, an optical fiber 16, a light emitting section 1
5 in the X-Y direction in the horizontal plane (X, Y are orthogonal 2
direction), an X-Y moving device 17, and a light source 2
An optical system consisting of 0, etc. is provided.

A base 21 is installed inside the container 11, and the base 21 can be raised and lowered by an elevator 22. These X-Y moving device 17, elevator 2
2 is controlled by a computer 23.

When producing a cured body using the above-mentioned apparatus, first, the base 21 is positioned slightly above the light-transmitting window 13, and the light beam 14 is scanned along the horizontal cross section of the target object. This scanning was performed using a computer controlled X
- Y-movement device position 7.

After irradiating the entire horizontal cross section of the target shape (in this case, the portion corresponding to the bottom or top surface), the base 21 is slightly raised, and the cured product 2
4 and the base 2 position, and then the same light irradiation as above is performed. By repeating this procedure, a cured product having the desired shape can be obtained as a multilayer laminate. In this molding process, since anti-reflection coating is applied to both sides of the light-transmitting window 13, the reflection of the light beam 14 on the surface of the light-transmitting window 13 is extremely small, and almost no light energy loss occurs. Incidentally, even by simply applying anti-reflection coating to only one surface of the light-transmitting window 13, a corresponding amount of light reflection can be prevented.

As the non-reflective coating, various coatings such as magnesium fluoride coating can be used.

In the above embodiment, a light-transmitting window is provided on the bottom of the container so that light is irradiated from below the container, but in the present invention, a light-transmitting window is provided on the side of the container 11, and light is emitted from the side of the container 11. It is also possible to irradiate. In this case, the base may be gradually moved laterally during the molding process.

In the above embodiment, the light beam 14 is scanned by the X-Y moving device 17, but the light from the light source is reflected by a mirror (not shown), then converged by a lens, and irradiated onto the photocurable resin. system may be adopted. In this case, the light beam can be scanned by rotating the mirror.

In the above embodiment, the cured product 24 is created by scanning the light beam 14, but the present invention applies this to a known mask method, and for example, as shown in FIG. You may use the mask 26 which has this. Reference numeral 27 indicates a parallel light beam. Other symbols in FIG. 2 indicate the same members as in FIG. 1.

In the present invention, the photocurable resin includes:
Various resins that are cured by light irradiation can be used, such as modified polyurethane methacrylate,
Examples include oligoester acrylates, urethane acrylates, epoxy acrylates, photosensitive polyimides, and amino alkyds.

As the light, various types of light such as visible light and ultraviolet light can be used depending on the photocurable resin used. Although the light may be ordinary light, using laser light has the advantages of increasing the energy level, shortening the modeling time, and improving the modeling accuracy by utilizing good light focusing. can.

[Effects of the invention] As described above, in the optical modeling device of the invention, reflection of light on the surface of the transparent window is prevented, so reflection of light irradiated toward the photocurable resin is prevented. The loss is extremely small, and therefore the power cost can be reduced, and the curing speed can be increased and the molding time accordingly shortened without increasing the light source output.

[Brief explanation of the drawing]

1 and 2 are configuration diagrams of an apparatus according to an embodiment of the present invention. 12...Photosetting resin, 13...Transparent window, 16
...Optical fiber, 20...Light source, 21...Base, 22...Elevator.

Claims (1)

[Scope of Claim for Utility Model Registration] An apparatus used in an optical modeling method that includes a step of irradiating a photocurable resin with light, curing the portion irradiated with the light, and stacking the cured material, the bottom or side surface a container for storing a photocurable resin having a light-transmitting window; a light irradiation device that irradiates light into the container through the light-transmitting window; and a light irradiation device capable of moving in a direction away from the light-transmitting window within the container. 1. An optical modeling device comprising: a base installed in a base; wherein at least one surface of the light-transmitting window is coated with an anti-reflection coating.