Ecole Polytechnique Federale De Lausanne

Ondax, Inc.

California Institute of Technology

North Corporation

Intel Corporation

Lyncee Tec Sa

Ecole Polytechnique Féderale De Lausanne (epfl)

Christophe Moser

Demetri Psaltis

Frank Havermeyer

Mickael Guillaumee

Eric Tremblay

David Ziegler

Damien Loterie

Paul Delrot

Karsten Buse

Greg Steckman

Ingo Nee

Joerg Hukriede

Lucio Kilcher

Francine Behar-Cohen

Philippe De Gol

Lawrence Ho

Timothé Laforest

Dino Carpentras

Mathieu Künzi

Nicolas Abele

George Barbastathis

Christian Depeursinge

Joseph W Goodman

Randy Heyler

Sebastien Blais-Ouellette

Ioannis Papadopoulos

Yves Emery

Alexandre Fotinos

Pierre-Etienne Bourban

Eric Maye

James Carriere

Frédéric Montfort

Andreas Schmocker

Dominique Pioletti

Volker Zagolla

Gregory J Steckman

Jan Krizek

Peyman Karami

Céline Samira Wyss

Keith Matthews

Sylvain Paul Hauser

Pascal Mosimann

Jacques-Edouard Moser

Salma Farahi

Edgar Emilio Morales Delgado

Sebastien Walpen

Zahra Monemhaghdoust

Mickael Guillaumée

The present invention is related to a method of digitally compensating distortions of rays of a light beam in tomography-based additive manufacturing, wherein said tomography-based additive manufacturing involves projecting light patterns from multiple angles into a container () comprising photoresponsive material, by simulating the path of the light rays through the container () and the photoresponsive material; and digitally compensating the light projections based on the simulated path of the light rays, so as to obtain modified light projections. The present invention is also related to a method and apparatus for preparing an object () in tomography-based additive manufacturing, employing said distortion compensation method.

Method and apparatus for volumetric additive manufacturing with digital distortion compensation

The present invention is related to a method and apparatus for the volumetric fabrication of three-dimensional objects or articles from photoresponsive materials loaded with scattering particles, by adjusting the refractive index of said photoresponsive material () so as to match the refractive index of said scattering particles (), and/or using a light source emitting light of a wavelength longer than 630 nm, preferably in a range from 630 nm to 1050 nm, more preferably in a range from 650 nm to 900 nm.

Method and apparatus for volumetric additive manufacturing of cell-loaded resins

The invention relates to a cross-linkable polymer including a base polymer including functional groups at least some of which have been reacted with a first organic molecule including a cross-linkable unit and with a second organic molecule capable of bonding to organic and/or inorganic substrates. The invention further relates to a hydrogel including the cross-linkable polymer that includes cross-linkable polymer strands, wherein at least some of the cross-linkable units of different cross-linkable polymer strands have reacted to form a covalent bond thereby forming a covalently linked network. The invention further relates to a method for the preparation of the hydrogel and to the use of the hydrogel.

Cross-linkable polymer, hydrogel, and method of preparation thereof

A method of fabricating a three-dimensional article comprises providing a spatially coherent light source (), generating from the light source (), patterns of light based on computed tomographic projections of the three-dimensional article, and projecting the patterns of light into a photoresponsive medium. The projecting is configured to define a three-dimensional dose distribution, thereby locally altering the phase of the photoresponsive medium and creating the article.

Methods and apparatus for tomographic additive manufacturing with a spatially coherent light source

A method for imaging a tissue of an eye, the method including the steps of providing oblique illumination to the eye by a plurality of light emitting areas of a light delivery device, the plurality of light emitting areas being independently controllable and arranged to direct light towards at least one of a retina and an iris of the eye, causing an output beam from light backscattered from the at least one of the retina and the iris by the oblique illumination, capturing the output beam with an imaging system to provide a sequence of images of a fundus of the eye, and retrieving a phase and absorption contrast image from the sequence of images of the fundus, wherein the sequence of images of the fundus of the step of capturing is obtained by sequentially turning on one or more of the plurality of light emitting areas at a time in the step of providing the oblique illumination.

System, method and apparatus for retinal absorption phase and dark field imaging with oblique illumination

Photoresponsive materials for use with a volumetric additive manufacturing system are described herein. Some embodiments of photoresponsive materials described herein include at least one constituent selected from the group consisting of (i) a thiol-containing siloxane prepolymer, (ii) a vinyl-containing siloxane prepolymer, (iii) a reinforcing filler, (iv) a photoinitiator (v) a polymerization inhibitor. Various methods of using the same photoresponsive materials in additive manufacturing processes, such as volumetric additive manufacturing, are also described.

Photoresponsive materials for volumetric additive manufacturing

A method for producing a three-dimensional object comprising computing a sequence of back-projections describing the three-dimensional object to be formed from different orientation angles of the object, defining a sequence of patterns of light using the back-projections, and irradiating with each of the patterns of light at the respective corresponding orientation angle. According to the defined sequence, a photoresponsive material is capable of altering its material phase, upon irradiation by light, thereby creating a three-dimensional distribution of alterations within the photoresponsive medium which physically reproduces the three-dimensional object, thereby creating the three-dimensional object.

Methods and apparatus for three-dimensional fabrication by tomographic back projections

A method for generating a three-dimensional patterned soft structure, including the steps of providing a soft supporting substrate, providing a drop-on-demand system with a device for varying the velocity of the jetted droplets, providing a liquid ink, jetting the liquid ink towards the soft supporting substrate with the drop-on-demand system, controlling an injection depth of the liquid ink into the soft supporting substrate by varying a jetting velocity of the liquid ink; and depositing droplets of the liquid ink over a volume of the soft supporting substrate, thereby generating the three-dimensional patterned soft structure.

Method and apparatus for generating three-dimensional patterned soft structures and uses thereof

The present invention concerns an organic cavity injection device including an injection cannula for injecting a photo-activatable substance inside an organic cavity; at least one element or a plurality of elements configured to control the removal of a resident substance from the organic cavity and simultaneously prevent removal of the non-activated photo-activatable substance from the organic cavity; and an optical waveguide for providing electromagnetic radiation inside the organic cavity to the photo-activatable substance to photoactive the photo-activatable substance inside the organic cavity.

Device and method for injection, photoactivation and solidifaction of liquid embolic material in the vascular system or other organic cavities

A retinal projector system, comprising a coupling means, a spacial light modulator, and a tapered optical waveguide having an input side surface and an output side surface, whereby the input side surface is larger than the output side surface, the coupling means being configured to couple coherent light into the spatial light modulator, the spacial light modulator being configured to receive the coherent light and output modulated light modulated in 2 dimensions towards the input side surface, the tapered optical waveguide being configured to guide the modulated light received at the input side surface and reduce a size of the tapered optical waveguide towards the output side surface, without losing any information from the modulated light at the output side surface such to allow an image formation.

System and method for a retinal projector based on a scattering reflector

Disclosed herein are devices and methods to provide a holographic optical element (HOE) having a modified shape and a structural attribute. At least one wavefront may be used to cause a first structure change in a material, used for the HOE, in a first shape. The material used for the HOE may be changed from the first shape to the modified shape to cause a second structure change in the material. The structural attribute in the material may be provided from a combination of the first structure change and the second structure change.

Holographic optical element design and manufacturing

Disclosed herein are devices and methods to provide multiple eyeboxes from multiple input pupils. In particular, a projection system can direct light from multiple input pupils to a holographic optical element. The light of each of the input pupils having light beams of different wavelengths. The holographic optical element reflects at least part of the light of the multiple input pupils to form an array of exit pupils.

Spatially separated exit pupils in a head mounted display

Various embodiments are generally directed to techniques for processing holographic recording media. Some embodiments are particularly directed to processing a raw holographic recording medium into an apodized holographic recording medium. For example, a raw holographic recording medium may include a plurality of photosensitive molecules uniformly distributed throughout that are able to record an interference pattern to create a hologram. However, when a photosensitive molecule is desensitized, such as by exposure to incoherent light, its photosensitivity is lost and the molecule may no longer be able to record an interference pattern of coherent light. Various embodiments described herein may include an apodized holographic recording medium that has been exposed to incoherent light in a manner to desensitize some photosensitive molecules therein such that the remaining photosensitive molecules have a non-uniform distribution.

Techniques for processing holographic recording media

Disclosed herein are devices and methods to provide a display including a projection system and a removable lenses including a holographic optical element to receive light and reflect the light to an exit pupil. Each of the removable lenses may comprise a holographic optical element in a different position of the lens to change the position of the exit pupil. The projection system may project an image onto the holographic optical element to project the image to the exit pupil.

Adjustable pupil distance wearable display

Growing community of inventors

Lausanne, Switzerland

Christophe Moser