Abstract: A method and apparatus for detecting drones via the insertion of asymmetric depth of focus in an optical path, inducing selective blurring along a single axis and thus allowing for filtering of events in a single axis.

Abstract: A method of volumetric additive manufacturing, comprising rotating a vial of photocurable resin; creating patterns of structured light images of an object to be manufactured so that the shape of the light dose distribution matches a desired shape of the object; correcting for diffusion within the vial; projecting the patterns of structured light images via a projector onto the rotating vial of photocurable resin thereby printing the object corrected for diffusion; and removing the printed object from the vial.

Abstract: A method and apparatus are set forth for volumetric additive manufacturing (VAM) wherein light rays that are used to determine tomographic projections are modelled using ray tracing, in order to account for projector non-telecentricity and etendue in all three dimensions. The path of rays from each light source (e.g. pixel) are computed as they propagate through the VAM system. Optical effects such as refraction, transmission loss, absorption, etendue, and non-telecentricity are intrinsically accounted for via ray tracing. Using these rays, the required dose to solidify the photosensitive resin is computed.

Abstract: A volumetric additive manufacturing (VAM) process for producing a solid object having a surface layer of a multifunctional material patterned thereon involves: contacting a surface of a solid base object with a liquid composition containing a photo-initiator and a multifunctional material covalently graftable to the surface of the solid base object; and, selectively irradiating the composition at the surface of the solid base object with patterned light, the irradiating being tomographic, to initiate covalent grafting of the multifunctional material to the surface of the solid base object to pattern only a portion of the surface of the solid base object with a layer of the multifunctional material grafted thereon, where the portion of the surface of the solid base object corresponds to the selectively irradiated surface of the solid base object.

Abstract: A method for additive manufacturing of an object having a three-dimensional structure formed from a photo-curable material, the method implemented by a computing device comprising a processor and a computer readable medium having instructions executable by the processor, the method comprising at least the steps of: (a) rotating a vial containing the photo-curable material in a path of a light beam at a predefined rotation speed; (b) calculating patterns associated with a 3D geometry of the object; (c) modulating a focal length of the beam within the photo-curable material while projecting the beam comprising the patterns into the photo-curable material to form the object.

Abstract: A system for forming an object having a three-dimensional structure, the system comprising: a container for providing a photo-curable material to be polymerized; a rotatable stage for supporting the container; a light source for providing light rays having at least one light pattern to be guided into the container via an optical assembly; a processing unit for determining the light source's degree of non-telecentricity, and determining an optimally pre-distorted set of the at least one light pattern based on at least the photo-curable material's refractive index; correcting at least one distortion of the light rays caused by refraction at the container interface and/or correcting at least one distortion of the light rays caused by non-telecentricity; and whereby the correction of the at least one distortion of the light rays is performed without altering the calibration of the optical assembly.

Abstract: A target located method and apparatus for the detection of lasers directed at the target using neuromorphic cameras which improve the detection by use of defocus.

Abstract: A photoresin composition for photopatterning in an oxygen-containing environment has a viscosity of about 300 cP or higher and contains: a reactive monomer with no hydrogen atoms having a bond-dissociation energy of less than about 410 kJ/mol, the hydrogen atoms; a non-amine reducing agent; and, a Norrish Type II photo-initiator. A volumetric additive manufacturing (VAM) process involves: immersing a solid base object in a liquid photoresin composition containing a photo-initiator and a multifunctional material; removing the solid base object with a film coating thereon from the liquid photoresin composition; and, selectively irradiating the composition at the surface of the object with patterned light to initiate covalent grafting or adhesion of the multifunctional material to the surface of the object to pattern only a portion of the surface of the object, where the portion of the surface of the object corresponds to the selectively irradiated surface of the object.

Abstract: Volumetric Additive Manufacturing allows for the rapid printing of objects by transmitting images into a reservoir holding resin, using wavelengths of light associated with a photocuring characteristic of the resin. Feedback based control can be enabled through the use of optical scattering tomography based imaging of the object during the printing process. Through capturing a set of images representing the scattering of a non-curing light, an isosurface representing the object during printing can be generated. The differences between the isosurface and the expected shape of the object can be used as an input into a control process or they can be displayed to an operator so that printing can be terminated when the printing of the object is complete.

Abstract: A photoresin formulation for volumetric additive manufacturing contains a photo-curable mixture of: a monomer (e.g., an acrylate-based monomer); a photoinitiator; a polymerization inhibitor (e.g., molecular oxygen (O2)); and, a reducing agent reactive with a free radical species (e.g., a peroxyl radical) formed from the polymerization inhibitor. The reducing agent permits faster printing of objects from the photoresin formulation in a volumetric additive manufacturing process to produce 3D objects of high fidelity.

Abstract: The invention relates to multicore fiber imaging, such as used in endoscopy. Methods are described for processing images captured with such systems to achieve an improved depth of field image or extract 3D information concerning the images, without requiring the addition of additional optical components. One method for generating an image from light received by an imager via a multiplicity of waveguides includes receiving a digital image containing a plurality of pixels, the digital image including a plurality of regions within it wherein each of said regions corresponds to a waveguide core. Each region includes a plurality of pixels, and a first subset of pixels within each region is defined which at least partly correlates with light having been received at a corresponding core in a first spatial arrangement, the subset including less than all of the pixels within a region. A first image is generated from the first subset of pixels from said regions, combined to form an image over the whole waveguide array.

Abstract: A system for forming an object having a three-dimensional structure, the system comprising: a container for providing a photo-curable material to be polymerized; a rotatable stage for supporting the container; a light source for providing light rays having at least one light pattern to be guided into the container via an optical assembly; a processing unit for determining the light source's degree of non-telecentricity, and determining an optimally pre-distorted set of the at least one light pattern based on at least the photo-curable material's refractive index; correcting at least one distortion of the light rays caused by refraction at the container interface and/or correcting at least one distortion of the light rays caused by non-telecentricity; and whereby the correction of the at least one distortion of the light rays is performed without altering the calibration of the optical assembly.

Abstract: The invention relates to multicore fiber imaging, such as used in endoscopy. Methods are described for processing images captured with such systems to achieve an improved depth of field image or extract 3D information concerning the images, without requiring the addition of additional optical components. One method for generating an image from light received by an imager via a multiplicity of waveguides includes receiving a digital image containing a plurality of pixels, the digital image including a plurality of regions within it wherein each of said regions corresponds to a waveguide core. Each region includes a plurality of pixels, and a first subset of pixels within each region is defined which at least partly correlates with light having been received at a corresponding core in a first spatial arrangement, the subset including less than all of the pixels within a region. A first image is generated from the first subset of pixels from said regions, combined to form an image over the whole waveguide array.

Abstract: Methods and systems are provided for distinguishing between more than one fluorescent species present in a sample in fluorescence microscopy. The method involves illuminating the sample with at least one light source. More than two images of the illuminated sample are recorded over a period of time, each image comprising a plurality of pixels, wherein each pixel corresponds to a location in the sample and records a degree of fluorescence at the location in the sample at a particular point in time. A photostability characteristic of the degree of fluorescence at each pixel over the period of time over which the more than two images were recorded is determined and used to distinguish between the more than one fluorescent species present in the sample.

Abstract: The invention relates to multicore fiber imaging, such as used in endoscopy. Methods are described for processing images captured with such systems to achieve an improved depth of field image or extract 3D information concerning the images, without requiring the addition of additional optical components. One method for generating an image from light received by an imager via a multiplicity of waveguides includes receiving a digital image containing a plurality of pixels, the digital image including a plurality of regions within it wherein each of said regions corresponds to a waveguide core. Each region includes a plurality of pixels, and a first subset of pixels within each region is defined which at least partly correlates with light having been received at a corresponding core in a first spatial arrangement, the subset including less than all of the pixels within a region. A first image is generated from the first subset of pixels from said regions, combined to form an image over the whole waveguide array.

Abstract: A microscope includes a multi-wavelength emitting laser light source. A microscope objective is configured to receive and expand input light emitted from the light source, and a dichroic mirror is configured to reflect the expanded input light. A micro lens array with a plurality of micro lenses splits the reflected and expanded input light onto a fluorescence producing sample. A lens collectively captures the fluorescence for each micro lens in the plurality of micro lenses, and a camera receives the fluorescence from the lens and produces an image of the sample based on the received fluorescence.

Abstract: A microscope includes a multi-wavelength emitting laser light source. A microscope objective is configured to receive and expand input light emitted from the light source, and a dichroic mirror is configured to reflect the expanded input light. A micro lens array with a plurality of micro lenses splits the reflected and expanded input light onto a fluorescence producing sample. A lens collectively captures the fluorescence for each micro lens in the plurality of micro lenses, and a camera receives the fluorescence from the lens and produces an image of the sample based on the received fluorescence.