| 摘要 |
The present invention relates to an apparatus (SA) for producing a three-dimensional object (OB) from a light-sensitive material (LSM), said apparatus comprising:
an exposure system (ES) with an illumination source,
a scanning bar to which the exposure system (ES) is mounted,
a control unit (CU),
whereby said exposure system (ES) comprises:
at least one spatial light modulator (SLM) with a plurality of individually controllable light modulators (LM),
input optics (lO) optically coupled to said at least one spatial light modulator (SLM),
output optics (OO) optically coupled to said at least one spatial light modulator (SLM),
wherein said input optics (lO) and output optics (OO) facilitates transmission of light emitted from said illumination source via said individually controllable light modulators (LM) of said spatial light modulator (SLM) to an illumination area (lA),
wherein said spatial light modulator (SLM) enables an establishment of a pattern of the light transmitted through said input optics (lO), according to control signals originating from said control unit (CU),
wherein said output optics (OO) enable focusing of the pattern of light from said at least one spatial light modulator (SLM) onto an illumination area (lA),
wherein the distance d between the output optics (OO) and the illumination area (lA) is between 0.5 and 20 mm, characterized in that
said apparatus (SA) exhibits a cleaning device (CLD) suitable to clean or wipe the surface of said exposure system (ES) facing said illumination area (IA), so that said output optics (OO) is enabled to focus correctly the pattern of light from said at least one spatial light modulator (SLM) onto the illumination area (lA) . |
