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    OPTICAL SENSING TECHNIQUES FOR CALIBRATION OF AN ADDITIVE FABRICATION DEVICE AND RELATED SYSTEMS AND METHODS
    11.
    发明申请
    OPTICAL SENSING TECHNIQUES FOR CALIBRATION OF AN ADDITIVE FABRICATION DEVICE AND RELATED SYSTEMS AND METHODS 审中-公开

    公开(公告)号：US20190210289A1

    公开(公告)日：2019-07-11

    申请号：US15865421

    申请日：2018-01-09

    Applicant: Formlabs, Inc.

    Inventor： Benjamin FrantzDale ,  Justin Keenan

    IPC: B29C64/393 ,  G01B11/00 ,  B33Y50/02

    CPC classification number: B29C64/393 ,  B29C64/135 ,  B29C64/153 ,  B33Y10/00 ,  B33Y50/02 ,  G01B11/002

    Abstract: Techniques of optically sensing fiducial targets, such as calibration patterns, within an additive fabrication device are provided. In some embodiments, fiducial targets may be disposed on a structure configured to contact source material of the additive fabrication device, the source material being a material from which the device is configured to fabricate solid objects. Indirect sensing means may be employed such that light emitted from a light source of the additive fabrication device scatters from the surface of a fiducial target. At least some of this scattered light can be measured by a sensor and used to determine a position of the fiducial target. In some embodiments, the fiducial target may be configured to move relative to the light source and/or sensor to provide additional information on the target's position via the light scattered from its surface.

    TECHNIQUES FOR OPTIMIZING PHOTOPOLYMER CURE ENERGY IN ADDITIVE FABRICATION
    15.
    发明申请
    TECHNIQUES FOR OPTIMIZING PHOTOPOLYMER CURE ENERGY IN ADDITIVE FABRICATION 审中-公开

    公开(公告)号：US20200290282A1

    公开(公告)日：2020-09-17

    申请号：US16817005

    申请日：2020-03-12

    Applicant: Formlabs, Inc.

    Inventor： Andrew M. Goldman ,  Henry Whitney ,  Justin Keenan ,  Benjamin FrantzDale ,  Michael Fogleman

    IPC: B29C64/386 ,  B33Y50/00 ,  G05B19/4099

    Abstract: According to some aspects, techniques are provided to more accurately produce fine features in additive fabrication. According to some embodiments, the techniques comprise a process that amplifies exposure to edges and thin positive features whilst not substantially affecting negative features. In particular, an area to be cured may be adapted using signal processing techniques to produce an energy density map. The area may subsequently be cured according to the generated energy density map by, for example, adjusting the scan speed, light power and/or number of passes of the light beam according to the map. As a result, the net exposure to edges and thin positive features may be amplified.

    PHOTOPOLYMER BLENDS AND RELATED METHODS
    18.
    发明申请
    PHOTOPOLYMER BLENDS AND RELATED METHODS 审中-公开

    公开(公告)号：US20180312705A1

    公开(公告)日：2018-11-01

    申请号：US15962219

    申请日：2018-04-25

    Applicant: Formlabs, Inc.

    Inventor： Dmitri Megretski ,  Maximilian Zieringer ,  Benjamin FrantzDale ,  Maxim Lobovsky

    IPC: C09D11/101 ,  C09D11/037 ,  B33Y70/00

    Abstract: The present application relates generally to photopolymer blends and related methods for use in an additive fabrication (e.g., 3-dimensional printing) device. According to some aspects, compositions are provided for the modification of a base photopolymer resin. The compositions may comprise colorant agent and/or cure-modifying composition. The compositions may be selected to cause, when combined with the base photopolymer resin to form a photo-curable composition, at least one property (e.g., color, depth of the cure) of the photo-curable composition to fall within a pre-determined range. Related kits and methods are also generally described.

    SUPPORT STRUCTURES TECHNIQUES FOR ADDITIVE FABRICATION AND RELATED SYSTEMS AND METHODS
    19.
    发明公开
    SUPPORT STRUCTURES TECHNIQUES FOR ADDITIVE FABRICATION AND RELATED SYSTEMS AND METHODS 审中-公开

    公开(公告)号：US20230161322A1

    公开(公告)日：2023-05-25

    申请号：US17990223

    申请日：2022-11-18

    Applicant: Formlabs, Inc.

    Inventor： Benjamin FrantzDale ,  Samuel Wainwright

    IPC: G05B19/4099 ,  G06T17/00

    CPC classification number: G05B19/4099 ,  G06T17/00 ,  G06T2200/24 ,  G05B2219/49023

    Abstract: Techniques are described for generating a support structure that connects to a part while avoiding connecting to regions that include one or more less desirable features, such as at edges, corners and/or high detail regions. A computing device may be configured to identify regions of the surface of a part that contain less desirable surface features, and exclude and/or disfavor those regions for connection to a support structure when generating the support structure. In some embodiments, regions containing less desirable surface features can be defined by a user, such as via a graphical user interface displaying a three-dimensional (3D) representation of a part to be fabricated.

    TECHNIQUES FOR GENERATION AND DIRECTION OF LIGHT IN ADDITIVE FABRICATION AND RELATED SYSTEMS AND METHODS
    20.
    发明申请
    TECHNIQUES FOR GENERATION AND DIRECTION OF LIGHT IN ADDITIVE FABRICATION AND RELATED SYSTEMS AND METHODS 有权

    公开(公告)号：US20220194003A1

    公开(公告)日：2022-06-23

    申请号：US17540592

    申请日：2021-12-02

    Applicant: Formlabs, Inc.

    Inventor： Andrew M. Goldman ,  Benjamin FrantzDale ,  Scott Norton

    IPC: B29C64/277 ,  B33Y30/00 ,  B29C64/268 ,  B29C64/255

    Abstract: According to some aspects, techniques that address one or more drawbacks of laser-based optical systems in additive fabrication devices are described. In some aspects, an additive fabrication device may include one or more variable focus lenses that may be operated (e.g., actuated) during fabrication to adjust the focus, and thereby the spot size, of a laser beam. In some aspects, an additive fabrication device may comprise a laser array, such as a plurality of vertical-cavity surface-emitting lasers (VCSELs), that may be operated to direct light into a build region, rather than using a single laser beam, such as a single diode laser. In some aspects, an additive fabrication device may comprise a container that includes a flexible display film, such as a flexible LCD screen, which may be operated to direct light into the container to thereby cure a liquid photopolymer therein.

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