Patents by Inventor Joel Rollin

Joel Rollin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9285600
    Abstract: In the field of optical systems comprising at least one optical objective, a photosensitive detector and an image processing unit, the optical objective comprising a pupil encoding filter, the image processing unit performing digital filtering of the images output by the photosensitive detector, a system has a processing unit comprising means arranged in such a way as to process at least one preset, the characteristics of the digital filtering applied to the image depending on this preset. The preset may come from external sensors of temperature and/or pressure or be one of the parameters of the optical objective such as the focal length value, the aperture of the iris, or the desired focal distance. The preset can also be different for different zones of the image, to better take into account the variations of the aberrations in the field of the focusing objective.
    Type: Grant
    Filed: July 4, 2012
    Date of Patent: March 15, 2016
    Assignee: Thales
    Inventors: Joël Rollin, Frédéric Diaz
  • Patent number: 9191585
    Abstract: A modular night visualization system with fused optical sensors comprises a light-intensifying base module and an image-sensing auxiliary module. The connections according to the system provide a modular system in which the auxiliary module is easily interchangeable with a different auxiliary module. Thus, a compact and modular visualization system that is operationally easier to use is provided. The system may be a night-vision field-glass for a foot soldier enabling fusion of sensors. Any other application for a vision field-glass with fused sensors is possible.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: November 17, 2015
    Assignee: Thales
    Inventors: Joel Rollin, Jean-Luc Espie
  • Publication number: 20140293097
    Abstract: In the field of optical systems comprising at least one optical objective, a photosensitive detector and an image processing unit, the optical objective comprising a pupil encoding filter, the image processing unit performing digital filtering of the images output by the photosensitive detector, a system has a processing unit comprising means arranged in such a way as to process at least one preset, the characteristics of the digital filtering applied to the image depending on this preset. The preset may come from external sensors of temperature and/or pressure or be one of the parameters of the optical objective such as the focal length value, the aperture of the iris, or the desired focal distance. The preset can also be different for different zones of the image, to better take into account the variations of the aberrations in the field of the focusing objective.
    Type: Application
    Filed: July 4, 2012
    Publication date: October 2, 2014
    Applicant: THALES
    Inventors: Joël Rollin, Frédéric Diaz
  • Publication number: 20130128004
    Abstract: A modular night visualization system with fused optical sensors comprises a light-intensifying base module and an image-sensing auxiliary module. The connections according to the system provide a modular system in which the auxiliary module is easily interchangeable with a different auxiliary module. Thus, a compact and modular visualization system that is operationally easier to use is provided. The system may be a night-vision field-glass for a foot soldier enabling fusion of sensors. Any other application for a vision field-glass with fused sensors is possible.
    Type: Application
    Filed: July 8, 2011
    Publication date: May 23, 2013
    Applicant: THALES
    Inventors: Joel Rollin, Jean-Luc Espie
  • Patent number: 7180659
    Abstract: The invention is directed to multispectral multifield optical combinations that are intended to be integrated into an optical device. A Cassegrain-type multifield optical combination has an image focal plane, comprising a first holed concave primary mirror that is fixed relative to the image focal plane and a convex secondary mirror.
    Type: Grant
    Filed: December 10, 2002
    Date of Patent: February 20, 2007
    Assignee: Thales
    Inventors: François-Xavier Doittau, Dominique Moreau, Joël Rollin
  • Publication number: 20050036219
    Abstract: The invention is directed to multispectral multifield optical combinations that are intended to be integrated into an optical device. A Cassegrain-type multifield optical combination has an image focal plane, comprising a first holed concave primary mirror that is fixed relative to the image focal plane and a convex secondary mirror.
    Type: Application
    Filed: December 10, 2002
    Publication date: February 17, 2005
    Inventors: Francois-Xavier Doittau, Dominique Moreau, Joel Rollin
  • Patent number: 5247173
    Abstract: The present invention concerns device for the acquisition of the angular position of mobile means of the type including a luminous source emitting an incident beam in a known direction and a reflecting surface attached to the mobile means. The device also includes an array of elementary charge coupled sensors positioned so as to be at least partly scanned by the reflected beam. The device includes in addition optical means for limiting the width of the incident beam. The said array is connected to an electronic circuit producing a digital signal varying according to the position and/or the number of elementary sensors illuminated by the reflected beam.
    Type: Grant
    Filed: May 22, 1992
    Date of Patent: September 21, 1993
    Assignee: Thomson TRT Defense
    Inventors: Thierry Benchetrit, Joel Rollin, Jean-Claude Bourgeois
  • Patent number: 5202792
    Abstract: An infrared objective device with optical achromatization and athermalization comprises a front convergent assembly having at least one divergent lens acting as a port and one convergent lens, and a rear divergent assembly comprising at least one divergent lens. These three lenses are chosen so as to be made of three different materials of the type that can be used in the 8 to 12 .mu.m spectral band. They may notably be made, respectively, of germanium, chalcogenide and zinc sulphide.
    Type: Grant
    Filed: October 3, 1991
    Date of Patent: April 13, 1993
    Assignee: Thomson TRT Defense
    Inventor: Joel Rollin
  • Patent number: 5013142
    Abstract: The bifocal optical system is formed in the long focal length mode by an objective having fixed lenses L1, L2, L3, L4 to which, for obtaining the short focal length, a group of movable lenses L5, L6, L7, L8 is added. The lenses L5, L6, L7 and L8 are accommodated in a holder (MB) which is rotatable around an axis YY' which extends parallel to the optical axis XX', thereby enabling very wide tolerances in the positioning of the movable holder.
    Type: Grant
    Filed: December 12, 1989
    Date of Patent: May 7, 1991
    Assignee: U.S. Philips Corp.
    Inventors: Joel Rollin, Jean-Claude Perrin
  • Patent number: 4907867
    Abstract: This varifocal optical system is electro-mechanically controlled to vary focal distance, temperature correction focussing and finite distance focussing. It is constituted by four single lenses (L1, L2, L3 and L4) two of which (L2, L3) are movable and are axially translated to vary the magnification, while only one (L3) of these two lenses is adapted for temperature correction focussing and finite distance focussing. It is also consituted by electro-mechanical member (EMM) which are especially adapted to control the movements of the two movable lenses (L2, L3) in a discrete manner.
    Type: Grant
    Filed: June 3, 1988
    Date of Patent: March 13, 1990
    Assignee: U.S. Philips Corp.
    Inventors: Jean-Claude Perrin, Joel Rollin
  • Patent number: 4902098
    Abstract: Device used in aviation for in-flight reception of images corrects distortion resulting from the observation of a field of view through a wall (1) which is transparent in a given spectral band and whose shape distorts the image of the scene formed on a receiver (4). An optical system arranged between the receiver and the wall performs an anamorphotic function in one direction and a deviation function in another direction perpendicular thereto. The deviation function is realized by a single prism formed by two parts (5,6) cemented to one another and which have different refractive indices so as to form an achromatic assembly. The anamorphotic function is obtained by a slight change of the focal length of the receiver in conjunction with the elongation of lines formed by the prism in the direction of the deviation function.
    Type: Grant
    Filed: October 26, 1988
    Date of Patent: February 20, 1990
    Assignee: U.S. Philips Corporation
    Inventors: Joel Rollin, Jean-Claude Perrin, Fernand Loy
  • Patent number: 4840465
    Abstract: Device for correcting the differential distortion resulting from simultaneous observation of a field of view at two distinct locations through a shield transparent in a given spectral band, which shield has a shape generating the distortion when a receiver which is sensitive in the spectral band is arranged at each of the locations. The correction is effected by an optical system arranged between the shield and one or the other receiver and comprising an anamorphic assembly (11, 12) producing an anamorphosis in a first direction associated with an element (13) introducing a curvature in a second direction, while the distortion produced by this system has a direction opposite to the differential distortion.
    Type: Grant
    Filed: November 19, 1987
    Date of Patent: June 20, 1989
    Assignee: U.S. Philips Corporation
    Inventors: Fernand R. Loy, Jean-Claude Perrin, Joel Rollin