OPTICAL SHAPING APPARATUS AND OPTICAL SHAPING METHOD

• US 20090142436A1
• Filed: 12/02/2008
• Published: 06/04/2009
• Est. Priority Date: 12/03/2007
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Honda, Katsuhisa, Kihara, Nobuhiro, Kuzusako, Junichi
• Granted Patent: US 8,454,879 B2
• Time in Patent Office: Days
• US Class Current: 425/174.400
• CPC Class Codes: B29C 64/135 the energy source being concentrated, e.g. scanning lasers or focused light sources
• CPC Class Codes: B33Y 30/00 Apparatus for additive manufacturing; Details thereof or accessories therefor
• CPC Class Codes: B33Y 50/00 Data acquisition or data processing for additive manufacturing

Abstract

An optical shaping apparatus includes: an exposing unit for turning on/off irradiation of light to a hardening resin surface for each predetermined unit area to irradiate light collectively on multiple the unit areas with irradiation of light being on; and a scanning unit for irradiating an optical beam with a predetermined diameter to scan the optical beam on the hardening resin surface; with the exposing unit irradiating the light in an area offset by a predetermined number of unit areas toward the inner side than the unit areas overlapped with the profile line of the cross-sectional-shaped data on the hardening resin surface; and with the scanning unit scanning an optical beam having a first diameter along a center line offset from the profile line of the cross-sectional-shaped data, and scanning an optical beam having a second diameter shorter than the first diameter along the inner side of the profile line.

Claims

1. An optical shaping apparatus configured to irradiate light according to the cross-sectional shape data of a three-dimensional model on the surface of a light hardening resin to form a hardening layer, and layer said hardening layer to shape said three-dimensional model, comprising:

one-shot exposing means configured to turn on/off irradiation of light to the surface of said light hardening resin for each predetermined unit area, and irradiate light collectively on a plurality of said unit areas of which irradiation of light is on; and

scanning exposing means configured to irradiate an optical beam with a predetermined diameter, and scan said optical beam on the surface of said light hardening resin;

wherein said one-shot exposing means irradiate said light in an area which is offset by a predetermined number of unit areas toward the inner side than said unit areas overlapped with the profile line of said cross-sectional shape data on the surface of said light hardening resin;

and wherein said scanning exposing means scan said optical beam having a first diameter with a center line which is offset to the inner side by predetermined distance from the profile line of said cross-sectional shape data as the center;

and wherein said scanning exposing means scan an optical beam having a second diameter which is shorter than said first diameter along the inner side of the profile line of said cross-sectional shape data.

2. The optical shaping apparatus according to claim 1, wherein the shape of said unit area is a square;

and wherein said first diameter is a value obtained by multiplying the length of one side of said unit area by the number of offsetting said unit area.

3. The optical shaping apparatus according to claim 2, wherein said predetermined distance wherein said center line is offset from said profile line is a value by adding a value of a half of said first diameter and said second diameter.

4. An optical shaping method for an optical shaping apparatus configured to irradiate light according to the cross-sectional shape data of a three-dimensional model on the surface of a light hardening resin to form a hardening layer, and layer said hardening layer to shape said three-dimensional model, wherein said optical shaping apparatus includes

one-shot exposing means configured to turn on/off irradiation of light to the surface of said light hardening resin for each predetermined unit area, and irradiate light collectively on a plurality of said unit areas of which irradiation of light is on, and

scanning exposing means configured to irradiate an optical beam with a predetermined diameter, and scan said optical beam on the surface of said light hardening resin, comprising the steps of:

causing said one-shot exposing means to irradiate said light in an area which is offset by a predetermined number of unit areas toward the inner side than said unit areas overlapped with the profile line of said cross-sectional shape data on the surface of said light hardening resin;

causing said scanning exposing means to scan said optical beam having a first diameter with a center line which is offset to the inner side by predetermined distance from the profile line of said cross-sectional shape data as the center; and

causing said scanning exposing means to scan an optical beam having a second diameter which is shorter than said first diameter along the inner side of the profile line of said cross-sectional shape data.

5. An optical shaping apparatus configured to irradiate light according to the cross-sectional shape data of a three-dimensional model on the surface of a light hardening resin to form a hardening layer, and layer said hardening layer to shape said three-dimensional model, comprising:

a one-shot exposing unit configured to turn on/off irradiation of light to the surface of said light hardening resin for each predetermined unit area, and irradiate light collectively on a plurality of said unit areas of which irradiation of light is on; and

a scanning exposing unit configured to irradiate an optical beam with a predetermined diameter, and scan said optical beam on the surface of said light hardening resin;

wherein said one-shot exposing unit irradiates said light in an area which is offset by a predetermined number of unit areas toward the inner side than said unit areas overlapped with the profile line of said cross-sectional shape data on the surface of said light hardening resin;

and wherein said scanning exposing unit scans said optical beam having a first diameter with a center line which is offset to the inner side by predetermined distance from the profile line of said cross-sectional shape data as the center;

and wherein said scanning exposing unit scans an optical beam having a second diameter which is shorter than said first diameter along the inner side of the profile line of said cross-sectional shape data.

6. An optical shaping method for an optical shaping apparatus configured to irradiate light according to the cross-sectional shape data of a three-dimensional model on the surface of a light hardening resin to form a hardening layer, and layer said hardening layer to shape said three-dimensional model, wherein said optical shaping apparatus includes

a one-shot exposing unit configured to turn on/off irradiation of light to the surface of said light hardening resin for each predetermined unit area, and irradiate light collectively on a plurality of said unit areas of which irradiation of light is on, and

a scanning exposing unit configured to irradiate an optical beam with a predetermined diameter, and scan said optical beam on the surface of said light hardening resin, comprising the steps of:

causing said one-shot exposing unit to irradiate said light in an area which is offset by a predetermined number of unit areas toward the inner side than said unit areas overlapped with the profile line of said cross-sectional shape data on the surface of said light hardening resin;

causing said scanning exposing unit to scan said optical beam having a first diameter with a center line which is offset to the inner side by predetermined distance from the profile line of said cross-sectional shape data as the center; and

causing said scanning exposing unit to scan an optical beam having a second diameter which is shorter than said first diameter along the inner side of the profile line of said cross-sectional shape data.