Abstract: Method for verifying registration of a model of an internal-body-part with the internal-body-part in a reference coordinate system. The internal-body-part is at least partially unseen directly by a user. The method includes the procedures of continuously determining a position and orientation of a head-mounted-display in the reference coordinate system, determining a display location of at least one virtual marker, and displaying the virtual marker according to the display location. The display location of the virtual marker is determined according to the expected position of a respective at least one reference point relative to the head-mounted-display. The reference point is directly visible to the user. The relative position between the reference point and the internal-body-part is substantially constant. The position of the reference point in the reference coordinate system is predetermined.

Abstract: A biodegradable polymeric sheet may be configured to undergo biodegradation on the ground responsive to an exposure to free air and natural day light. The biodegradable polymeric sheet may include a first layer comprising polysaccharide at a weight % of between 15% to 50% and a polyester matrix, the first layer is configured to form a water barrier when in contact with water; a second layer comprising a polysaccharide at a weight % of at least 40% and a polyester matrix; and a third layer comprising polysaccharide at a weight % of between 15% to 50%, a polyester matrix and an additive configured to accelerate disintegration of the polymeric sheet when exposed to natural day light, the third layer is configured to form a water barrier when in contact with water.

Abstract: A method and a system for displaying conformal synthetic data on a scene over a head-mounted see-through display (HMSTD) having a line of sight (LOS) are provided herein. The system may include: a tracker configured to track the LOS of the HMSTD; a display controller configured to display on the HMSTD a first display area comprising a synthetic image data conformal to a scene viewed from the HMSTD; wherein said display controller is configured to receive a desired point being a point within the scene which intersects the LOS of the HMSTD and to display a second display area on said HMSTD, wherein the second display area is positioned relative to said desired point, wherein said synthetic image data is displayed over the HMSTD at a reduced intensity on an overlap area between the first and the second areas.

Abstract: Head-mounted see-through displays and methods are provided which improve helicopter displays and provide more relevant information to the pilot while reducing the information load on the display. Displays comprise a peripheral pilot-scene pitch indication region, indicating scene orientation information according to an orientation of the pilot's head with respect to the scene, a propulsion state indication region, indicating rotor and engines states with respect to their nominal operation states by presenting only deviations of the rotor and engines states from their nominal operation states, a speed indication region, indicating, in association with displayed air speed, a calculated ground speed or a calculated ground speed component in a direction of propagation and a helicopter pitch indication region displaying a pitch ladder which is re-arranged to space close pitch lines and crowd remote pitch lines.

Abstract: A system determines a dynamic collision awareness envelope for a vehicle. The system includes at least one vehicle motion sensor, an operator Line-Of-Sight detector and a processor. The vehicle motion sensor periodically provides measurements relating to the motion of the vehicle in a reference coordinate system. The operator Line-Of-Sight detector periodically provides information relating to the direction of the Line-Of-Sight of an operator of the vehicle, in a vehicle coordinate system. The processor is coupled with the at least one vehicle motion sensor, and with the operator Line-Of-Sight detector. The processor determines an operator vector from the direction of the Line-Of-Sight of the operator. The processor further determines an operational vector at least from the motion of the vehicle. The processor periodically determines a collision awareness envelope respective of each of the operational vectors, from the operator vector and the respective operational vector.

Abstract: A system for displaying videos, comprising a processing resource configured to: provide a data repository comprising a plurality of previously captured video segments (PCVSs) captured during previous operations of corresponding platforms, each being associated with metadata indicative of a Line-of-Sight (LoS) of a sensor, carried by the corresponding platform of the platforms used to capture the corresponding PCVS, with respect to a fixed coordinate system established in space, during capturing the corresponding PCVS; obtain an indication of a Region-of-Interest (RoI); identify one or more of the PCVSs that include at least part of the RoI, utilizing the LoSs associated with the PCVSs, giving rise to RoI matching PCVSs; and display at least part of at least one of the RoI matching PCVSs, being displayed RoI matching PCVSs, on a display of an operating platform to an operator of the operating platform during a current operation of the operating platform.

Abstract: Method and system for displaying virtual environment during in-flight simulation. A simulation environment is selected for a training simulation of an airborne platform operating in flight within a real environment. The position and orientation of a display viewable by an operator of the airborne platform is determined with respect to the selected simulation environment. The display displays at least one simulation image comprising a view from a virtual altitude of simulation environmental terrain in the selected simulation environment, while the airborne platform is in flight at a real altitude above the real environmental terrain in the real environment, the virtual altitude above the simulation environmental terrain being a lower altitude than the real altitude above the real environmental terrain. The simulation image is displayed in accordance with the determined position and orientation of the display, such that the simulation environment is adaptive to operator manipulations of the airborne platform.

Abstract: A head wearable device (HWD) suitable to be worn by a user, the HWD may include: a head tracker configured to track a line of sight (LOS) of the user; a near eye display (NED) comprising: a plurality of transistors groups forming a pixel array of said display, a plurality of backlight units, forming a backlight surface of said display; a backlight control module configured to dim the backlight units that spatially overlap one or more of the transistor groups whenever the data at said transistor groups is being refreshed and further configured to change at least one of: a frequency and a location of the dimmed backlight units; and a computer processor coupled to the tracker and the NED and configured to instruct the backlight control module to change at least one of: the frequency and the location of the dimmed backlight units, based on the user LOS.

Abstract: A direct view display system (DVDS) and a method to operate it are provided herein. The DVDS may include: a variable optical power element (VOPE); a transparent active image source located with the VOPE on a common optical axis going from an outside scene to an eye position of a viewer; and a time division multiplexer (TDM) configured to control the VOPE and the transparent active image source, wherein the TDM is configured in a certain time period to cause the transparent active image source to be in a transparent state and the VOPE to exhibit no optical power, and wherein the TDM is configured in another time period to cause said transparent active image source to exhibit an image and said VOPE to apply non-zero optical power, for projecting the image onto the eye position at a desirable distance therefrom.

Abstract: A system and method for displaying a sensor data on a display are provided herein. the system may include: a tracker arrangement to track line of sight (LOS) of a user; a sensor configured to be directed based on the LOS and configured to capture data of a scene relative to said LOS, to yield LOS captured data; and a display configured to: receive the LOS captured data, and display the LOS captured data relative to the LOS, wherein the display field of view (FOV) is wider than the sensor FOV and wherein the display is configured to display a mosaic of plurality of the LOS captured data, wherein at least one of the LOS captured data appears in the mosaic is a real time LOS captured data, and wherein at least one of the LOS captured data appears in the mosaic is a previous LOS captured data.

Abstract: Method and system for displaying virtual environment during in-flight simulation. A simulation environment is selected for a training simulation of an airborne platform operating in flight within a real environment. The position and orientation of a display viewable by an operator of the airborne platform is determined with respect to the selected simulation environment. The display displays at least one simulation image comprising a view from a virtual altitude of simulation environmental terrain in the selected simulation environment, while the airborne platform is in flight at a real altitude above the real environmental terrain in the real environment, the virtual altitude above the simulation environmental terrain being a lower altitude than the real altitude above the real environmental terrain. The simulation image is displayed in accordance with the determined position and orientation of the display, such that the simulation environment is adaptive to operator manipulations of the airborne platform.

Abstract: A method and a system for displaying conformal synthetic data on a scene over a head-mounted see-through display (HMSTD) having a line of sight (LOS) are provided herein. The system may include: a tracker configured to track the LOS of the HMSTD; a display controller configured to display on the HMSTD a first display area comprising a synthetic image data conformal to a scene viewed from the HMSTD; wherein said display controller is configured to receive a desired point being a point within the scene which intersects the LOS of the HMSTD and to display a second display area on said HMSTD, wherein the second display area is positioned relative to said desired point, wherein said synthetic image data is displayed over the HMSTD at a reduced intensity on an overlap area between the first and the second areas.

Abstract: A system determines a dynamic collision awareness envelope for a vehicle. The system includes at least one vehicle motion sensor, an operator Line-Of-Sight detector and a processor. The vehicle motion sensor periodically provides measurements relating to the motion of the vehicle in a reference coordinate system. The operator Line-Of-Sight detector periodically provides information relating to the direction of the Line-Of-Sight of an operator of the vehicle, in a vehicle coordinate system. The processor is coupled with the at least one vehicle motion sensor, and with the operator Line-Of-Sight detector. The processor determines an operator vector from the direction of the Line-Of-Sight of the operator. The processor further determines an operational vector at least from the motion of the vehicle. The processor periodically determines a collision awareness envelope respective of each of the operational vectors, from the operator vector and the respective operational vector.

Abstract: A liquid crystal display (LCD) that may include: a plurality of transistors groups forming a pixel array of said LCD, wherein the transistors groups are independently controllable; a plurality of backlight units, forming a backlight surface of said LCD, wherein the backlight units are independently controllable; a data refresh module configured to periodically refresh data at said groups of transistors, at a specified order, over a refresh cycle time; and a backlight control module configured to periodically dim the backlight units at said specified order over a backlight cycle time which is substantially shorter than the refresh cycle time.

Abstract: A system and a method of monitoring physical properties of a physical medium over time are provided herein. The method may include the following steps: embedding a plurality of acoustic sensors into a physical medium before curing thereof; transmitting an acoustic wave by at least one transmitter coupled to or embedded within said physical medium; repeatedly calculating, over different points of time, a travel time of said acoustic wave between the at least one transmitter and the plurality of acoustic sensors; and analyzing said travel times, to detect a change over time in physical properties of said physical medium associated with said travel time.

Abstract: Embodiments concern a method for providing information to a user of a vehicle via a display device that is worn by the user. The method comprises providing a principle axes rotation coordinate system (Vxyz) that defines a vehicle orientation relative to a world coordinate system (Wxyz) of a reference world space; providing at least one display device coordinate system (Dxyz) that defines a display device orientation relative to the vehicle coordinate system; and providing a symbol coordinate system (Sxyz) that is spatially fixed with at least one first symbol to be displayed on the display device and that defines three symbol rotation axes that are orthogonal to each other; and spatially fixing at least one of the symbol rotation axes (S?) to a vehicle principal axis of rotation descriptive of an orientation of the vehicle.

Abstract: A method and an apparatus for detecting a modification of a compound, the modification occurring during a transient period. The method may include: coupling at least one substance portion comprising ferro elastic material to a compound, the substance portion being configured to change a polarization level thereof continuously in response to a strain gradient applied thereto over the a transient period which results in said modification; sensing a physical property of said substance portion affected by the polarization level of the substance portion, due to the modification; and determining, using a computer processor, the modification, based on the sensed physical property of the substance portion.

Abstract: A microsurgery system comprising a robotic arm, configured for movement; a head mounted display (HMD) configured to display to a user in real-time image sequences of an operated area; at least one camera coupled to said robotic arm, said at least one camera configured to acquire operated-area image sequences of said operated area, said at least one camera being suspended above said operated area and being mechanically and optically disconnected from said HMD, said robotic arm enables said at least one camera to capture said operated-area image sequences from a range of perspectives; a processing device configured to be coupled with said HMD and said at least one camera, said processing device configured to transmit said image sequences of said operated-area to said HMD; and a tracker configured to track at least one of a head of said user, a hand of said user, and a tool held by said user; wherein said robotic arm is enabled to be guided according to movements of tracked at least one of said head, said hand,

Abstract: A method for automatically determining a potential transmission region, comprising: acquiring multiple binary indications for a direct line of sight between a transmitter and an airborne vehicle respective of multiple geo-positions of the airborne vehicle; acquiring each of the multiple geo-positions respective of each of the multiple binary indications for the direct line of sight; for each one of the acquired geo-positions, determining a layer of access respective of topographical data for the geographical region and the acquired geo-position, as a subset of the geographical region that includes at least one potential point defining a potential line of sight between the transmitter and the airborne vehicle, thereby determining multiple layers of access; determining an intersection of the multiple layers of access; and determining, from the intersection, the potential transmission region respective of the transmitter and the geo-positions of the airborne vehicle.

Abstract: System for registering a coordinate system associated with a pre-acquired model of an object with a reference coordinate system. The system includes a portable unit which includes a display, a tracking system for tracking the portable unit and a processor. The processor is coupled with the portable unit and with the tracking system. The processor determines the position and orientation of the portable unit. The processor further determines the position of at least one marker located on the object according to at least one of, a tracked pointer and respective position related information. The processor further displays registration related information on the display. At least one of the registration related information and the display location of the registration related information are related to the position and orientation of the portable unit. The position of the at least one marker, in the coordinate system associated with the pre-acquired model, is predetermined.