Abstract: According to one aspect of the present invention, a radar system is provided which accurately measures the surface profile in a wide sector beneath and forward of a helicopter, to aid low level transit and landing in poor visibility. This uses an electronic beam synthesis technique to form multiple beams directed at the area of interest, each measuring the distance to the first reflected signal received by each beam. These distances represent the profile of the ground and any objects on the ground. A processor then compares the measured profile with the ideal ground profile for safe landing. If the deviations from straight and level exceed the specified requirement for safe landing, or if sufficient rotor clearance is not detected, then a warning is given to the operator. A display will show the measured ground profile highlighting the unsafe regions, allowing the operator to seek a safe region to land.

Abstract: A probe for use with a measurement instrument includes a circuit connected to the probe. The probe comprises a process adaptor for mounting to a process vessel and including a through bore extending from a connector end to a process end. A counterbore at the connector end defines a shoulder. A support assembly is received in the counterbore and rests on the shoulder. The support assembly comprises an annular rod support having a through opening with a tension rod extending through the opening and secured at opposite sides of the annular rod support. A locking nut secures the support assembly in the counterbore to maintain the annular rod support in compression. A probe rod extends from a process end of the tension rod. A seal assembly is operatively secured to the process adaptor at the connector end with the seal pin in electrical contact with a connector end of the tension rod.

Abstract: A guided wave radar level measurement instrument comprises a probe defining a transmission line for sensing material level. A probe interface circuit is connected to the probe for generating pulses on the transmission line and receiving reflected signals from the transmission line. The probe interface circuit comprises a transmit pulse generator for generating a transmit pulse, a sample pulse generator for generating a sample pulse, and a delay lock loop for controlling the transmit and sample pulse generators. The delay lock loop is controlled by a pulse repetition frequency having a duty cycle less than 50%.

Abstract: A guided wave radar level measurement instrument comprises a probe defining a transmission line for sensing material level. A pulse circuit is connected to the probe for generating pulses on the transmission line and receiving reflected signals from the transmission line. The pulse circuit comprises a pulse generator for generating a transmit pulse, a bridge circuit having a diode switched front end connected between the pulse generator and a differential circuit. The transmission line is connected to one side of the differential circuit. Generated pulses from the pulse generator are supplied to both sides of the differential circuit and reflected signals from the transmission line are supplied to one side of the differential circuit.

Abstract: A process measurement instrument includes a fiducial and is adapted for detection of the fiducial. The instrument includes an interface circuit comprising a drive circuit for transmitting a pulse signal at the fiducial and at a target of interest and a receive circuit receiving reflected echoes of the pulse signal and developing an analog receive signal representative of the reflected echoes. A processing circuit is operatively coupled to the interface circuit for receiving the analog receive signal and comprising a threshold detector detecting if the analog receive signal is above a select threshold value. A controller is operatively coupled to the processing circuit and responsive to leading and trailing edges of the reflected echo for the fiducial and determining an average of the leading and trailing edges to determine location of the fiducial.

Abstract: A holographic imaging system including a transmission line coupled to an antenna at one end and to a signal source at another end. The antenna defines an aperture through which a signal generated by the signal source is transmitted incident to an object located remotely from the aperture and through which a signal reflected from the object is received by the antenna aperture. A standing wave probe phase-referenced to the antenna aperture samples the reflected signal. A detector connected to the standing wave probe receives the sampled reflected signal and provides an output signal that represents a real-valued signal proportional to an in-phase component of the reflected signal from the object. A processor executes an imaging algorithm for generating a multi-dimensional profile representative of the object based on the output signal from the detector.

Abstract: The present disclosure provides a method and a corresponding device for extending the illumination of an object under investigation. The object under investigation is illuminated with an electromagnetic microwave signal which is transmitted from a transmission antenna. The microwave signal reflected from the object under investigation is received by at least one reception antenna. An image of the object under investigation is reconstructed through synthetic focusing of the reflected microwave signal.

Abstract: An RF/digital signal-separating receiver is provided for GNSS and other RF signals. The receiver includes a first master antenna and a second slave antenna, which are positioned in spaced relation for directional, radio compass applications. First and second downconverters and first and second ADCs are located under the first and second antennas in analog signal areas, which configuration minimizes cross-coupling RF signals from the antennas and reduces noise. The first and second ADSs are connected to respective first and second correlators in a digital signal location, which is centrally located relative to the antennas. The correlators are connected to a microprocessor for computing distances for the received signals, from which the receiver's orientation or attitude is determined. A method of manufacturing receivers with this configuration is also disclosed.

Abstract: A method and apparatus for processing and transmitting precise orbit predictions of satellites in a Global Navigation Satellite System such as Navstar-GPS which employs curve fitting techniques and a polynomial and sinusoidal model to encode ephemerides, and particularly ephemerides of durations 6 hours or longer, in order to minimize bandwidth requirements over-the-air and NVRAM storage requirements. The methods also apply to GNSS constellations such as Galileo or GLONASS. Also, methods are disclosed for recovering the ephemeris on a GNSS receiver device in the constellation's native format.

Abstract: An anti-jamming subsystem for a jamming signal originating along the horizon includes an anti-jamming antenna with a horizontal reception pattern constrained to receive signals originating along the horizon. The subsystem receives the signals from the anti-jamming antenna and a reference antenna, which has a half hemispherical reception pattern looking skyward. The subsystem utilizes associated phase information to phase shift the signals received by the anti jamming antenna and produce an anti-jamming signal, and combines the anti jamming signal with the signals received by the reference antenna to produce signals in which the interference from the jamming signal originating along the horizon is actively cancelled and the phase and timing information of signals received by the reference antenna from at least higher elevation satellites is preserved. The horizontal reception pattern of the anti-jamming antenna may be circular or directional toward a known jammer positioned along the horizon.

Abstract: A method includes estimating a position of a receiver, aboard a moving object, on the basis of the navigation signals emitted by satellites received by an antenna in an antenna array placed on the moving object, and using a three-dimensional geographical map to deduce, geometrically, on the basis of the position of the receiver and of a ray casting starting from the receiver, the number of paths reflected on walls of buildings present in a scene corresponding to an environment surrounding the receiver. The determined number of reflected paths is used to initialize an algorithm for estimating angles of arrival of multi-paths to deduce therefrom angles of arrival of the paths reflected on the walls before reaching the receiver. Optionally, the method can comprise making it possible to bound the distance information error due to a multi-path to render the estimation of direction of arrival of the signals more efficacious.

Abstract: Disclosed herein are a method of generating a correlation function with no side-peak and a system for tracking a BOC signal in order to synchronize the BOC signal. The method of generating a correlation function includes step S1 of generating sub-correlation functions {Sl(?)}l=0N?1, step S2 of generating a first final correlation function R0(?) by combining some of the sub-correlation functions, and step S3 of generating a second final correlation function Rproposed(?) by combining R0(?) with each of the remaining sub-correlation functions that have not been used for the combination at step S2. The BOC signal is one or more of BOCsin(kn,n) and BOCcos(kn,n) signals.

Abstract: The present invention is a compact directional receiving antenna and method for providing same utilizing true-time-delay methods to achieve a wide pattern bandwidth in a compact size. In one embodiment, two right-triangular-shaped loops are positioned symmetrically in a vertical plane and about a vertical axis so that they share a common apex. In another embodiment, two pairs of loops are positioned in an orthogonal manner about a vertical axis to form an electronically rotatable antenna array. In yet another embodiment, a single loop is provided with a pair of spaced couplers.

Abstract: An apparatus for radio direction finding, the apparatus comprising: a receiver configured to receive target signals to be subjected to the direction finding of signal sources, which are acquired by an antenna array; a channel profiler configured to produce profiles of the target signals received through the receiver; a pre-analyzer configured to preemptively process in a narrowband the wideband target signals based on the profiles that are produced by the channel profiler to produce pre-analyzed information for the wideband target signals; and a direction finder configured to perform the direction finding on the signal sources using the pre-analyzed information and the profilers of the target signals.

Abstract: A method for determining location of a person relative to a vehicle. A first device comprising a Bluetooth transceiver is associated with the person, and a second device comprising a Bluetooth transceiver is associated with the vehicle. The method includes determining whether the strength of a signal received by one device from the other device via has diminished below a predetermined level, in which case a notification is provided to a computer system via wireless data communication that the status has changed from a first link status wherein the first device is within a predeterminable distance from the second device to a second link status wherein the first device is beyond the predeterminable distance from the second device.

Abstract: A multiband antenna apparatus and an electronic apparatus having the multiband antenna apparatus are provided. The multiband antenna apparatus includes: a low frequency antenna which transmits and receives at least one low frequency band signal; and a high frequency antenna which transmits and receives at least one high frequency band signal, wherein the low frequency antenna includes a single wing part which emits an electric wave.

Abstract: An multi-band antenna includes a base section including a first end and a second end opposite to each other, a first radiating arm and a second radiating arm extending opposite to each other from the first end and locating on two opposite sides of the base section in a longitudinal direction, and a loop conductive portion extending from the base section. The loop conductive portion includes a grounding portion locating adjacent to the second end of the base section and a connecting portion extending in the longitudinal direction. The connecting portion is located on the same side of the base section with the first radiating arm.

Abstract: A mobile device includes a dielectric substrate, a metal layer, a metal housing, a nonconductive partition, at least one connection element, and a feeding element. The metal layer is disposed on the dielectric substrate, and includes an upper element and a main element, wherein a slot is formed between the upper element and the main element. The metal housing is substantially a hollow structure, and has a slit, wherein the slit is substantially aligned with the slot of the metal layer. The connection element couples the upper element of the metal layer to the metal housing. The feeding element is coupled to the upper element of the metal layer or coupled to the metal housing. An antenna structure is formed by the feeding element, the upper element of the metal layer, the connection element, and the metal housing.

Abstract: An antenna device which is built into an electronic appliance having a metal cover provided with a radio wave passer is provided. The electronic apparatus includes an antenna portion arranged adjacent to the radio wave passer so as to be capable of transmitting and receiving radio waves through the radio wave passer. A reflecting portion which reflects the radio waves radiated from the antenna portion is located on an opposite side of the antenna portion, so that the antenna portion is between the reflecting portion and the radio wave passer.

Abstract: The Omega-Tec Compact Mobile and Fixed Broadband Dual-Mode HF Antenna System represented is a Dual-Mode HF Mobile Antenna System composed of two subsystems. The low band unit provides NVIS high-angle communications over an operating frequency range of 2-10 MHz while the high band unit provides conventional low-angle long range communications over a frequency range of 8-30 MHz.

Abstract: A perpendicular substrate antenna 7 is fixed vertically on an upper surface of a baseplate 3. An antenna pattern 18 is formed on the surface of the perpendicular substrate antenna 7 and a coil is 13 mounted. A plate shaped antenna 8 is attached to an upper edge of the perpendicular substrate antenna 7. The plate shaped antenna 8 includes a structure in which a pair of flat parts 81, 82 are connected via clip parts 83˜86 and contact arms 93, 84, 62, 64 which contact the surface of the perpendicular substrate antenna 7 and latching arms 96, 97, 61, 62 which pass through perpendicular substrate antenna 7 and contact the opposite side surface each protrude from a lower edge of each flat part 81, 82.

Abstract: A tattooed antenna and antenna system are disclosed. The tattooed antenna includes one or more nanoparticles in a fluid. The one or more nanoparticles are configured to be injected as a tattoo into a body to thereby form an antenna configured to transmit data received from a source. The antenna system may include feed system that drives the tattooed antenna. The tattooed antenna may be a feed pickup antenna and/or a radiating antenna.

Abstract: A display panel comprises a first substrate and a second substrate which are arranged opposite to each other, and an antenna pattern is formed on the inside or the outside of the first substrate and includes a feed point and a ground point; the feed point is connected with a transceiver in a display device; and the ground point is connected with a ground wire of the transceiver.

Abstract: According to an embodiment, an antenna apparatus include a ground plate; a first element disposed along the ground plate; a second element disposed along the first element at an opposing side of the ground plate; a connecting part to connect first and second terminal parts of the first element with first and second terminal parts of the second element, respectively, or to connect the first and second terminal parts of the first element with the ground plate; a first power feeding portion to feed power at a midpoint of the first or second element in a longitudinal direction when the first and second elements are connected together by the connecting part; and a second power feeding portion to feed power to the first element or the ground plate when the first element and the ground plate are connected together by the connecting part.

Abstract: Capacitively coupled antenna apparatus and methods of operating and adaptively tuning the same. In one embodiment, the insertion loss component in “beside the hand/head” use scenarios is significantly reduced or eliminated such that the antenna experiences only absorptive losses (which generally cannot be avoided), and a very small insertion loss by the host device radio frequency tuner. The exemplary antenna apparatus may be configured for multi-band operation, and also has a very small form factor (e.g., 3 mm ground clearance only at the bottom of the PCB, 4 mm height in one implementation), thereby allowing for use in spatially compact host devices such as slim-line smartphones, tablets, and the like. The adaptive antenna arrangement (using capacitive feed) can be tuned such that the tuner is used in free space, and the user's hand/head tunes the antenna to the band of interest while in use.

Abstract: A communication device including a ground element and an antenna element is provided. The antenna element is disposed adjacent to the ground element. The antenna element includes a first radiation element and a second radiation element. The first radiation element includes a first portion and a second portion. The first portion is coupled through an inductive element to the second portion. The first portion is coupled to a signal source. The second portion includes a plurality of bends such that a coupling gap is formed between an open end of the second portion and the first portion. The second radiation element has a shorted end and an open end. The shorted end of the second radiation element is coupled to the ground element. The second radiation element extends and at least partially surrounds the first radiation element.

Abstract: A feed horn for a Low Noise Block down converter is disclosed. The feed horn includes a conical body for gathering satellite signals and a connector coupled to the conical body for coupling the feed horn to a waveguide of the Low Noise Block down converter to transmit the satellite signals to the waveguide. The conical body includes a plurality of corrugations, one of the plurality of corrugations includes a plurality of first openings, and a plurality of second openings, each of the plurality of second openings is formed between the two adjacent first openings, wherein the plurality of first openings and the plurality of second openings are used as slits to induce an interference effect to adjust a beam pattern of the feed horn.

Abstract: Devices and methods are disclosed for providing an improved antenna for NFC mobile devices. Embodiments of the disclosure provide an antenna configuration that makes it possible to establish an NFC link when an NFC mobile device is oriented in ergonomic positions that are desirable for a user. In various embodiments, the NFC antenna is folded and wrapped around a portion of the case of a mobile wireless device. Using the NFC antenna disclosed herein, an NFC link can be established regardless of the orientation of the NFC wireless mobile device and another NFC device, as long as the antenna-bearing end of the wireless mobile device is pointed toward the antenna of the other NFC device.

Abstract: Multi-band antenna systems for communication systems are disclosed. An antenna system includes at least one low band dipole radiating element for radiating RF energy in a low frequency range and at least one group or column of high band dipole radiating assemblies for radiating RF energy in a high frequency range. The low band dipole radiating element may be constructed to provide improved control beam width stability of the high band dipole radiating assemblies and improved cross-polarization performance in the low frequency range. The high band dipole radiating assemblies include high band dipole radiating elements and shrouds surrounding the high band dipole radiating elements. The shrouds are configured to improve the beam width stability and cross-polarization of the high band dipole radiating elements, improve isolation between the high band dipole radiating elements and to shift resonance of the high band dipole radiating assemblies below the low frequency range.

Abstract: An RF signal input and output to and from a communication unit is extracted to outside of an antenna module before the RF signal is routed through a matching circuit unit and an antenna unit and a variation occurs, and the RF signal is accurately measured and inspected using a high-frequency wave measuring instrument such as a network analyzer. When the characteristics of the antenna unit have fluctuated or been deteriorated after the antenna module has been installed in a communication device, a measure is implemented by connecting an external matching circuit unit or an external antenna unit to a signal extraction unit.

Abstract: An end fire antenna apparatus built in an electronic apparatus includes a printed circuit board (PCB), at least one main antenna built in the PCB and configured to radiate a radio wave, and a ground plate disposed on a side surface of the PCB, the ground plate being electrically isolated from the at least one main antenna. The at least one main antenna has a pillar shape uniformly extending along a thickness direction of the PCB.

Abstract: According to one embodiment, an antenna apparatus includes a concave curved reflector, a radiator arranged in a focal position of the reflector to perform at least one of transmission of two linearly polarized waves toward a concave surface of the reflector and reception of the waves from the concave surface, the two linearly polarized waves being crossed orthogonally to each other, and a structural unit configured to support the radiator at the focal position. The unit includes a main body protruding from a rear surface of the reflector into a radiation space defined by the concave surface at a position on the concave surface, the position being apart from two linear polarization planes defined by the two linearly polarized waves.

Abstract: A decoupling circuit for enhancing isolation of two antennas is disclosed. The two antennas are substantially symmetrically disposed on a substrate. The decoupling circuit includes a first and second metal strips parallel disposed between the two antennas and electrically connected to a ground, a connection strip electrically connected between terminals of the first and second metal strips, to substantially form a doorframe structure, a first comb structure comprising a plurality of metal segments parallel to each other, disposed on the substrate, electrically connected to and perpendicular to the first metal strip, and a second comb structure comprising a plurality of metal segments parallel to each other, disposed on the substrate, electrically connected to and perpendicular to the second metal strip.

Abstract: Multipath reception by an antenna is reduced by mounting the antenna on a semi-transparent ground plane that has a controlled distribution of layer impedance over a central region and a peripheral region. The central region includes a continuous conductive segment on which the ground element of the antenna is disposed. The distribution of the layer impedance over the peripheral region is configured by multiple conductive segments electromagnetically coupled by lumped circuit elements. A semi-transparent ground plane can be fabricated by depositing a metal film on a dielectric substrate and etching grooves into the metal film to form a desired pattern of conductive segments. Lumped circuit elements can be fabricated as discrete devices, surface mount devices, and integrated circuit devices. Various semi-transparent ground planes can be configured for linearly-polarized and circularly-polarized radiation.

Abstract: A limiter for high-frequency signals has an input, whereas the high-frequency signal is supplied to the limiter at its input. The limiter provides several limiting stages which are electrically connected to the input. Each limiting stage is a series circuit with an unbiased diode and a Zener diode which does not serve to bias the diode, so that the high-frequency signal is electrically connected to a reference ground via the one unbiased diode and the Zener diode.

Abstract: A method and apparatus has been developed to reduce SAR for a mobile device by designing appropriate matching circuits between each antenna and its power amplifier. In the presence of such matching circuits the normal phase adjustments may be carried out to provide a preferred safe SAR level that can be maintained during phase adjustment without sacrificing TRP.

Abstract: A loop antenna adapted for a communication device is provided. The loop antenna includes a feed, a ground, a circular loop, at least one first tuning element, and at least one second tuning element. The circular loop is connected to the feed and the ground. The first tuning element is extended from the circular loop and corresponds to a first frequency band. The second tuning element is extended from the circular loop and corresponds to a second frequency band. Bandwidths of the first frequency band and the second frequency band of the loop antenna are changed by adjusting the first tuning element and the second tuning element, respectively.

Abstract: An apparatus comprising: a ground member (22) including an edge (32); a near field coupling member (30) configured to electromagnetically couple with other coupling members (41) external to the apparatus (12), and being configured to receive signals from and/or provide signals to radio frequency circuitry (14), at least a first portion (44) of the one or more loops being positioned adjacent or at the edge (32) of the ground member, the near field coupling member (30) including one or more loops defining an aperture (42), the near field coupling member being configured to receive one or more antennas (18) within the aperture (42) of the one or more loops. The first portion (44) of the one or more loops may be positioned outside of the edge of the ground member and be separated from the edge by a first gap (46). The apparatus may further comprise one or more decoupling members (48) configured to reduce interference between the near field coupling member and the one or more antennas (18).

Abstract: The antenna device disclosed includes an insulating antenna case, an antenna base, and an umbrella-type element. A lower surface of the insulating antenna case is open and a housing space is formed in the insulating antenna case. The antenna base includes an insulation base on which the antenna case is fitted, and a conductive base which is smaller than the insulation base and is fixed to the insulation base. The umbrella-type element is provided on the antenna base in such a way that a rear section thereof is located above the insulation base and a front section thereof is located above the conductive base.

Abstract: The antenna device disclosed includes an insulating antenna case, an antenna base, an umbrella-type element, an amplifier substrate, and a coil. A lower surface of the insulating antenna case is open and a housing space is formed in the insulating antenna case. The antenna case is fitted on the antenna base. The umbrella-type element is provided on the antenna base. The amplifier substrate includes an amplifier which amplifies a signal received by the umbrella-type element, and is disposed on the antenna base. The coil is inserted between an output end of the umbrella-type element and an input end of the amplifier to make the umbrella-type element resonate at a predetermined frequency, and is disposed substantially at a center in a width direction of the umbrella-type element.

Abstract: A method for assembling a housing of an electronic device including the following steps is provided. An antenna pattern layer and an adhesive layer is provided, wherein the antenna pattern layer has a first surface opposite a second surface, and the adhesive layer is disposed on the first surface of the antenna pattern layer. A plastic frame is formed on the second surface of the antenna pattern layer by injection molding. The antenna pattern layer and the plastic frame are attached on a substrate via the adhesive layer. In addition, a housing assembly of an electronic device is also provided.

Abstract: An antenna includes a support body having a rod shape, a first helical antenna element, and a second helical antenna element. The first helical antenna element is wound about the axis of the support body. The second helical antenna element overlaps the first helical antenna element with an insulator provided between the first helical antenna element and the second helical antenna element. The second helical antenna element is wound about the axis in a direction opposite to a direction in which the first helical antenna element is wound.

Abstract: A multi display device includes panel housings having displays. The panel housings are foldable on each other and the displays are disposed adjacent to each other when the panel housings are unfolded. A key input part is further provided to be foldable on the panel housings. Accordingly, the multi display device is easy to grasp for the user while providing the folding/folding convenience.

Abstract: Method and system for mirroring multimedia content for sharing between multiple display devices is provided. Preferred usage configuration modes for smart mirroring for multiple display system are provided, in which multiple sets of display frame buffers can be provided in which each set of compatible display frame buffer is correspondingly allocated for one display device having a particular resolution. Preferred usage configuration modes are adapted for smaller screen, larger screen, and balanced usage between smaller screen and larger screen together. Dynamic switching between preferred usage configuration modes is available. System level API and inherit support at hardware side of the display devices are configured to allow for rendering of various display frame buffers to various display devices.

Abstract: An apparatus that supports multi-display to reproduce images on an external display apparatus connectable to the apparatus, a method of operating the apparatus, and a computer readable recording medium recorded thereon a program for executing the method. The apparatus includes: a digital signal processor which, when a signal of a first display command is input to the apparatus, displays a screen obtained by performing the first display command on the apparatus in a continuous reproduction mode at a predetermined speed, and when a signal of a second display command corresponding to the signal of the first display command is input to the apparatus, displays a screen obtained by performing the second display command on the external display apparatus images on the external display apparatus at a speed different from the predetermined speed of the continuous reproduction mode.

Abstract: In an embodiment, a display apparatus includes multiple physical interface circuits (PHYs) couple to respective displays. In a mirror mode, the PHYs may operate as masters. A primary master PHY may control a synchronization interface to one or more secondary master PHYs. The synchronization interface may include a start of frame signal that the primary master PHY may generate to indicate the beginning of a new frame. The secondary master PHYs may be configured to generate internal start of frame signals while independently processing the same display data as the primary master. If the internally-generated start of frame and the received start of frame occur within a window of tolerance of each other, then the secondary masters may continue to process the display data stream independently. A secondary master that detects the start of frames occur outside of the window of tolerance may resynchronize.

Abstract: Method and apparatus for interacting with a three dimensional interface. In the method, a three dimensional interface with at least one virtual object is generated. An interaction zone is defined and generated, enclosing some or all of the object. A stimulus of the interaction zone, e.g. approach/contact with a finger/stylus is defined, and a response to the stimulus is defined, e.g. changes to the object, system actions, feedback, etc. When the stimulus is sensed the response is executed. The apparatus includes a processor that generates a three dimensional interface with at least one virtual object, defines an interaction zone for the object, and defines a stimulus and a response. A display outputs the interface and object. A camera or other sensor detects stimulus of the interaction zone, whereupon the processor generates a response signal. The apparatus may be part of a head mounted display.

Abstract: An image display device which is used by being mounted on the head or face of a user includes a display unit which displays an image; an information maintaining unit which maintains user information of the user; a region specifying unit which specifies an attention region from a field of vision of the user based on the user information; an image processing unit which performs image processing with respect to the attention region; and a display control unit which displays the attention region after being subjected to the image processing on the display unit.

Abstract: An optical device for virtual image display with unequal focal length and high magnification, comprising an image display, an optically transparent material and a mirror; the optically transparent material being disposed at an oblique angle between the image display and the mirror, and, on the optically transparent material, the side opposite the image display being coated with a reverse anti-reflective film, the other side being coated with a polarizing film or successively with a polarizing film and a forward anti-reflective film; and the included angle between the mirror and the optically transparent material together with the deposition angle M of the reverse anti-reflective film being 90°. The present invention is an optical device structural design with a virtual image optical design including a birefringence function, providing a new design with innovative and improved optics.

Abstract: An enclosure includes an optical structure which divides the enclosure into a front section and a back section which includes a background setting. The enclosure includes a preprogrammed code located along an exterior wall. A smart phone can be used to sense the code and project an image onto the optical structure, which image is reflected enabling a viewer to see the reflected image superimposed on the background setting.