Aerial imaging using retroreflection

Abstract

A system and method for generating a real image through retroreflection is provided. An image source projects a light beam that is received by a beam splitter. The beam splitter is positioned between a retroreflector and a viewing area and can reflect the light beam toward the retroreflector. The light beam can then be reflected from the retroreflector back toward the beam splitter to generate a real image that appears to a viewer to be floating within the viewing area. A controller can control the image source to adjust the real image based on a control parameter detected by at least one sensor.

Description

Technical Field

[0001] (Cross - Reference to Related Applications) This application claims priority and the benefit thereof from U.S. Provisional Application No. 63 / 110,216, entitled "AERIAL IMAGING USING RETROREFLECTION", filed on November 5, 2020, and the entire disclosure of which is incorporated herein by reference for all purposes.

[0002] (Technical Field) This section is intended to introduce the reader to various aspects of technologies that may be relevant to various aspects of the present disclosure. The discussions herein are thought to be useful in providing the reader with background information that facilitates a better understanding of the various aspects of the present disclosure. Accordingly, these descriptions should be read from this perspective and it should be understood that they are not an admission of prior art.

Background Art

[0003] Amusement parks or theme parks generally include a variety of entertainment systems or attractions, each offering a unique experience to visitors. For example, an amusement park may include different attraction systems such as roller coasters, drop towers, and log flumes. Some attraction systems may include environments with multiple distinct features, such as 3D images (e.g., offset pairs of 2D images of features that create the illusion of three dimensions when viewed through the appropriate lenses), volumetric displays, and special effects, which help immerse visitors in the experience of the attraction system. With projection technology, visitors may wear special viewing glasses (e.g., 3D glasses, augmented reality headsets) to view 3D and floating images. However, such viewing glasses are inconvenient and can increase the operational costs associated with projecting 3D media. For example, augmented reality headsets need to be cleaned after each visitor's use and can be expensive. Therefore, improved features and technologies related to 3D images are useful in providing visitors with desirable effects or experiences.

[0004] These and other features, aspects, and advantages of this disclosure will be further understood by reading the following detailed description with reference to the accompanying drawings, in which similar reference numerals indicate similar elements throughout the drawings. [Brief explanation of the drawing]

[0005] [Figure 1] This is a block diagram of an illusion system that generates a spatial image or a real image using retroreflection, according to an embodiment of the present disclosure. [Figure 2] This is a schematic plan view of the illusion system shown in Figure 1, which generates a real image based on a 2D source, according to an embodiment of the present disclosure. [Figure 3] This is a schematic plan view of the illusion system shown in Figure 1, which generates a real image based on a 3D source, according to an embodiment of the present disclosure. [Figure 4] Figure 1 is a schematic plan view of the illusion system according to an embodiment of the present disclosure, depicting a vehicle moving through a real image. [Figure 5] This is a schematic elevation view of the illusion system shown in Figure 4, according to an embodiment of the present disclosure. [Figure 6] This is a schematic plan view of the illusion system shown in Figure 1, which generates a real image in combination with the ghost effect of Pepper according to an embodiment of the present disclosure. [Figure 7] This is a schematic plan view of the illusion system of Figure 1, which provides an image sharing and viewing experience using the ghost effect of Pepper in Figure 6, according to an embodiment of the present disclosure. [Figure 8] This is a schematic plan view of the illusion system shown in Figure 1, which generates a real image with a narrow field of view, according to an embodiment of the present disclosure. [Figure 9] This is a schematic plan view of the illusion system shown in Figure 1, which generates a real image using a rotating beam splitter according to an embodiment of the present disclosure. [Figure 10] Figure 1 is a schematic plan view of an illusion system that generates a real image using water as a beam splitter, according to an embodiment of the present disclosure. [Figure 11] Figure 1 is a schematic plan view of an illusion system that generates a real image using a two-sided corner reflector array as a beam splitter, according to an embodiment of the present disclosure. [Figure 12] Figure 1 is a schematic diagram of an illusion system that provides an immersive effect with respect to a real image by adjusting the light source, according to an embodiment of the present disclosure. [Figure 13A] Figure 1 is a schematic plan view of an illusion system according to an embodiment of the present disclosure, which generates a real image using two beam splitters, two image sources, and two retroreflectors. [Figure 13B] This is a schematic plan view showing the actual image of Figure 13A as seen from a different position, according to the embodiments of this disclosure. [Modes for carrying out the invention]

[0006] This disclosure relates to the field of special effects for use in interactive environments such as game environments or amusement parks. More specifically, this disclosure relates to systems and methods for generating spatial or real images using retroreflection. As used herein, a spatial or real image can be defined as a 2D or 3D image (e.g., a projected image) that appears to float in the air or can be observed in the air without viewing glasses. A 2D image typically refers to what is considered a “flat” image provided in two dimensions (e.g., horizontal and vertical). A typical example of a 2D image includes an image projected onto a conventional movie screen that appears flat to the observer. A 3D image is also a “flat” image, but is provided to appear three-dimensional. For example, a conventional method of providing a 3D image is to provide two images of an object, one image to each of the viewer's eyes. In such a conventional system, the illusion of three dimensions is provided to the viewer by using special glasses that restrict the viewing of each image to each viewer's eye. Note that according to this embodiment, a 2D image can be projected to appear as if it is hovering in a three-dimensional environment.

[0007] One or more specific embodiments are described below. For the sake of brevity in describing these embodiments, not all features of the actual embodiments are described herein. Note that, as with any technical or design project, the development of any such actual implementation will require numerous implementation-specific decisions to achieve the specific goals of the developers, which may differ from implementation to implementation, such as compliance with system and business-related constraints. Furthermore, note that while such development efforts may be complex and time-consuming, they are routine design, fabrication, and manufacturing tasks for those skilled in the art who benefit from this disclosure.

[0008] When introducing elements of the various embodiments of this disclosure, the articles "a," "an," and "the" mean that one or more elements exist. The terms "equip," "include," and "have" are comprehensive and mean that additional elements other than those described may exist.

[0009] Amusement parks may include illusion systems that produce special effects by generating spatial images using retroreflection to provide a desirable visitor experience through their attractions. In fact, a combination of specific hardware configurations (e.g., circuits), software configurations (e.g., algorithmic structures and / or modeled responses), and specific attraction features can be used to provide visitors with spatial images.

[0010] As used herein, a spatial image or real image can be defined as a 2D or 3D image that appears to float in the air or can be observed in the air without glasses. The spatial image or real image can be projected into the air based on the positioning and / or retroreflective techniques of an image source (e.g., a light source). The image source can be any appropriate size or shape and may include a plurality of discrete sources. In some embodiments, the image source may be a light source that helps to illuminate or project a 2D image, a 3D image, or both. Non-limiting examples of light sources include one or more light-emitting diode (LED) or organic light-emitting diode (OLED) string lights, one or more LED or OLED displays, one or more LED or OLED panels, one or more LED or OLED lamps, flat-screen televisions, liquid crystal displays (LCDs), light matrices, and one or more projectors.

[0011] As an example, a light source can project multiple or numerous light beams such that a light beam diverges from the light source. The light beams can be directed to a beam splitter. The beam splitter can be any suitable size and shape (e.g., a cube, a plate). The composition of the beam splitter can include glass, plastic, or any fully or partially transparent material. As used herein, the beam splitter can be an optical device configured to split or separate a light beam into two or three or more different light beams. The beam splitter includes a layer of material configured to reflect and transmit light. After the light beam reaches the beam splitter, the first portion of the light beam can be refracted or transmitted through the beam splitter. In this way, the light beam can be separated into multiple different light beams with different light intensities and light powers. These multiple different light beams may have reduced light intensities compared to the light beam originally diverging from the light source. The beam splitter can be configured so that less than 20% of the light beam 54 (e.g., 10%, 15%) passes through the beam splitter. The second portion of the light beam can be reflected from the beam splitter and directed towards a retroreflector. For example, the beam splitter can be configured to reflect at least 80% of the light beam 54 (e.g., 90%, 95%) towards the retroreflector. The beam splitter can be placed between the retroreflector and the viewing area. The viewing area is a physical space that can be positioned so that visitors can see real images.

[0012] A retroreflector can be a device or surface that reflects light back to its source with limited scattering. That is, a retroreflector can receive each beam of a second portion of a light beam at a specific angle and reflect each beam of that second portion back to its source (e.g., a beam splitter) at a specific angle. A retroreflector can retroreflect light back to the source region with an efficiency somewhere between 70 and 100% (e.g., 70-75%, 75-80%, 80-85%, 85-90%, 90-95%, or 100% efficiency) (e.g., within an error band of less than 5%). A retroreflector can be any appropriate size, shape, or color. Generally, improved retroreflector quality can reduce scattering of reflected light at the beam splitter. Each beam of the second portion of the light beam reflected from the retroreflector can pass through the beam splitter and be focused to form an image based on the light source (e.g., a real image, a spatial image). A real or spatial image can be generated when the light beam associated with the second part appears to converge to a point in space. As described herein, real and spatial images can be used interchangeably. That is, when a real or spatial image is generated via retroreflection, the real or spatial image appears to visitors as if it is floating in mid-air.

[0013] As mentioned above, retroreflective technology can be used to provide special effects in amusement parks or to enhance the visitor experience. For example, the special effect could include an image that appears to show lightning shooting out from a sword after a visitor has moved the sword in a specific pattern. To generate the real image of the lightning, the illusion system's controller can track the position of the display object or the position from which the real image is expected to be generated via one or more sensors. In this example, the real image can be generated to appear to be projected from the tip of the sword furthest from the visitor. In some embodiments, the display object can be a prop, a handheld object (e.g., a staff member), or a visitor's hand. One or more sensors can be configured to detect the position of the display object or the visitor within the viewing area. From the viewing area, the visitor can be made to see the real image (e.g., lightning shooting out from the wand).

[0014] Furthermore, given the position of the image source or light beam source (e.g., LED string lights, LED display), the expected position of the real image can be calculated. That is, the distance from the light beam source to the beam splitter is the same as the distance from the real image to the beam splitter. In other words, the position of the real image is the mirror image position of the light beam source with respect to the beam splitter. The controller can be configured to control the image source to provide a real image that appears spatially related to the display object. That is, the controller adjusts the image source so that the position of the intersecting light beam that defines the real image correlates with the position of the display object. When the real image is spatially related to the display object, both the real image and the display object are positioned in spatially similar locations. Therefore, the positioning of the display object is linked to, or affects, the positioning of the real image. Techniques implemented by the controller to control the image source so that the real image appears specifically related to the display object are described below.

[0015] Light beams associated with lightning (e.g., diverging light beams) can be emitted from one or more LED string lights and directed to a beam splitter. A portion of the light beam can be reflected from the partially or completely transparent beam splitter and directed to a retroreflector. The retroreflector can then reflect the light beam back to the beam splitter with the same magnitude and angle as it received. The light beam can pass through the beam splitter and be focused to form a real image of the source (e.g., a real image representing lightning). From a visitor's perspective, it may appear as if lightning is shooting out of a sword. In reality, what appears to be lightning is the result of retroreflection generating a spatial image of the lightning.

[0016] The light beam source can be string lights, projectors, light grids (e.g., LEDs), or light field displays. However, LED grids can be susceptible to the effect of individual LED lights blocking each other if the grid is at full volume. Light field displays can generate 3D spatial images based on a vector function that describes the amount of light flowing in all directions through any point in space. However, light field displays can be expensive and difficult to obtain. In some embodiments, to generate accurate spatial images in a cost-effective manner, the light beam source in the illusion system can include string lights. The string lights can be any number or type of light, such as LED string lights, OLED string lights, or fluorescent string lights.

[0017] For example, the illusion system can include a plurality of LED string lights, and each LED string light can be arranged at a different position in the area behind the beam splitter. Based on calculating or tracking the expected position of the real image, a specific LED string light can be activated from the plurality of LED string lights. Tracking of the expected position can be based on using any of various tracking technologies such as radio frequency identification (RFID) monitoring, GPS, cameras, motion sensors, etc. to track a user, a prop (e.g., a toy), or a device. In some embodiments, the controller can calculate the expected position of the real image in response to detecting motion data (e.g., correlated with a predefined motion signature) related to a park visitor (e.g., swinging a sword) via one or more sensors. As an example, the controller can determine that the tip of the sword (e.g., the position of the sword where a lightning bolt is expected to be emitted) is at an angle of 39 degrees with respect to the beam splitter. That is, if the real image is expected to be displayed to the park visitor at a position 39 degrees from the beam splitter, the controller can determine which of the plurality of LED string lights to activate to generate the real image at a position 39 degrees from the beam splitter. For example, the controller can determine that an LED string light at a position 45 degrees from the beam splitter is at an angle closest to the position of the real image at a position 39 degrees from the beam splitter compared to other LED string lights. In this way, the controller can activate the LED string light at an angle of 45 degrees.

[0018] In some embodiments, the light beam source (e.g., a plurality of LED lights) and the retroreflector can be arranged behind the beam splitter so that both are hidden from the direct line of sight of the visitors. As described above, the distance from the LED string light to the beam splitter is the same distance with respect to the distance from the virtual image to the beam splitter. The position of the virtual image is the mirror image position of the light beam source with respect to the beam splitter. The light beam source can be controlled so that the virtual image appears in a special way related to the display object. That is, the angle of the activated LED string light affects the predicted position of the virtual image. Since the controller may activate the LED string light positioned at 45 degrees from the beam splitter, the position of the virtual image may also be 45 degrees from the beam splitter as well. Due to the positioning constraints of the plurality of LED lights, the position of the virtual image at 45 degrees can most closely resemble the position and angle of the tip of the sword at 39 degrees. The difference in the angles of 45 degrees and 39 degrees can be made negligible to the human eye. Therefore, when the controller activates the LED string light at 45 degrees, it may appear that lightning (e.g., a virtual image) is emitted from the sword to the visitors.

[0019] In alternative or additional embodiments, the illusion system can include one or more movable string lights, and one or both ends of the string light can be motorized. For example, in response to the controller determining that the predicted position of the virtual image is at a position 39 degrees from the beam splitter (e.g., based on the detection of the position of the display object), the controller can instruct the actuator to move the string light to an angle of 39 degrees from the beam splitter.

[0020] Looking at the figures, Figure 1 shows a block diagram of an illusion system 10 that generates a spatial or real image using retroreflection according to an embodiment of the present disclosure. As shown, the illusion system 10 may include an image source 20 (e.g., a light source), a controller 14 (e.g., a programmable logic controller or computer), and one or more sensors 12 (e.g., a motion sensor, a light sensor, a thermal sensor). As previously stated, the image source 20 may include one or more string lights. In some embodiments, the image source 20 (e.g., string lights) may be operable (e.g., movable via one or more actuators 22). The movement of the image source 20 may be controlled by actuators 22 coupled to the image source 20. The actuators 22 may be any suitable type and number of actuators to provide motion, including, but not limited to, electric actuators, pneumatic actuators, mechanical actuators, linear actuators, rotary actuators, or any combination thereof. Based on commands from the controller 14, the actuator 22 can adjust the movement of the image source 20 (e.g., string lights, projector, or display). In some embodiments, the actuator 22 represents a set of actuators connected to the image source 20, providing the movement of the image source 20. As described above, in response to the controller 14 detecting motion data related to visitors (e.g., waving hands or props) and determining the expected position of the real image, the controller 14 can command the actuator 22 to move the light source (e.g., string lights) so that the angle of the light source is similar to the expected position of the spatial image. For example, if the real image is expected to be displayed to visitors at 39 degrees, the controller 14 can command the actuator to move the LED string lights from the beam splitter to an angle of 39 degrees.In another embodiment, the controller may activate an LED string light positioned at a 45-degree angle when that LED string light is closest to the angle of the expected position of the real image compared to other LED string lights. In yet another embodiment, different techniques may be employed to correlate the real image to a desired position (e.g., the detected position of a prop or person), such as activating various pixels on a display.

[0021] As shown in the figure, one or more sensors 12 and an image source 20 are each communicatively coupled to a controller 14 of the illusion system 10. In some embodiments, the image source 20 can be communicatively coupled to the controller 14 via an actuator 22. The controller 14 includes a processor 16 and memory 18. The controller 14 can control the light beam emitted by the image source 20 based on signals received from one or more sensors 12. For example, one or more sensors 12 can determine the position of a display object (e.g., a prop or a hand) or the position where a real image is expected to be generated, and can output a sensor signal to the controller 14 indicating the position of the display object (e.g., a handheld object, a prop). Based on the position of the display object indicated by the sensor signal, the controller 14 can, via the processor 16, actively and / or update the position of the image source 20 emitting the light beam. The emitted light beam is reflected from a beam splitter and then directed to a retroreflector. In some embodiments, the controller 14 can output a control signal to the actuator 22 indicating the position of the image source 20. Based on the reception of the control signal from the controller 14 indicating the position of the image source 20, the actuator 22 can move the LED string lights so that they are in the same position as indicated by the control signal.

[0022] In certain embodiments, the actuator and one or more sensors 12 are communicatively coupled to a controller 14. The controller 14 can execute hardware and / or software control algorithms to adjust the activation or movement of the image source 20. This may include activating different parts of the image source 20 (e.g., different pixels of a display or parts of a light matrix). The controller 14 may include a programmable logic controller (PLC) or other suitable control device. According to some embodiments, the controller 14 may include an analog-to-digital (A / D) converter, one or more microprocessors or general-purpose or special-purpose computers, non-volatile memory, memory circuits, and / or interface boards. For example, the controller 14 may include memory circuits for storing programs, control routines, and / or algorithms implemented for controlling various system components, such as the speed at which a string of light moves. The controller 14 also includes, or is associated with, input / output circuits for receiving signals sensed from one or more sensors 12, and interface circuits for outputting control signals. The memory circuits may store setpoints, actual values, historical values, etc., for any or all of such parameters. Any other suitable device may be included in the illusion system 10, such as additional transducers or switches that sense movement, light, sound, etc., related to visitors. Furthermore, other values ​​and / or setpoints can be used to determine when and how to operate the image source 20 (e.g., the movement of string lights and / or activating a specific string light from a group of string lights). For example, the controller 14 can determine the distance and angle of the image source 20 from the beam splitter, the frequency and time period of activation or movement of the image source 20, which may include activating or moving a portion of the image source 20.The controller 14 may also include components for interaction between the illusion system 10 and the operator, such as a display panel and / or input / output devices for checking operating parameters, inputting control signals representing setpoints and desired operating parameters, and checking error logs and historical operation. The controller 14 can receive data from one or more sensors 12 and / or control actuators 22, and then control the position of the image source 20 to generate a spatial image. In other embodiments, the aspects of the image source 20 can be controlled directly without the actuators 22. For example, the image source 20 can be controlled to change the display to achieve a similar result.

[0023] The controller 14 may include one or more processors 16 (e.g., microprocessors) capable of executing a software program for determining the predicted position of the real image. The processors 16 can process instructions for execution within the illusion system 10. The processors 16 may include single-threaded processors, multi-threaded processors, or both. The processors 16 can process instructions and / or information (e.g., control software, lookup tables, configuration data) stored on a memory device 18 or storage device. The processors 16 may include hardware-based processors, each containing one or more cores. Furthermore, the processors 16 may include multiple microprocessors, one or more "general-purpose" microprocessors, one or more system-on-chip (SoC) devices, one or more special-purpose microprocessors, one or more application-specific integrated circuits (ASICs), and / or one or more reduced instruction set computer (RISC) processors. The processors 16 may be communicatively coupled to one or more sensors 12, actuators 22, and / or other electronic devices.

[0024] The memory device 18 may include tangible, non-temporary machine-readable media such as volatile memory (e.g., random-access memory (RAM)) and / or non-volatile memory (e.g., read-only memory (ROM), flash memory, hard drive, and / or any other suitable optical, magnetic, or solid-state storage medium). The memory device 18 can store a variety of information that can be used for a variety of purposes. For example, the memory device 18 may store machine-readable and / or processor-executable instructions (e.g., firmware or software) for the processor 16 to execute to associate the detected position of a user or prop with the location where a real image should be presented. In particular, the memory device 18 may store instructions that cause the processor 16 to adjust the image source 20 to achieve a desired presentation by operating or moving the image source 20 to provide a real image that is observed to have a correspondence with the position of the user or prop.

[0025] In certain embodiments, one or more sensors 12 may include any of various sensor types useful for detecting the presence of visitors, the positions of visitors and display objects, and / or motion data (e.g., correlated with predefined motion signatures) indicating the execution of specific actions to the controller 14. Thus, one or more sensors 12 may detect changes such as movement, light, and sound related to visitors. For example, one or more sensors 12 may include any number of position sensors, motion sensors, proximity sensors, ultrasonic sensors, photoelectric sensors, microelectromechanical system (MEMS) sensors, sound sensors, and / or cameras. For example, a camera may detect the position and movement of visitors (e.g., the movement of the visitor's body, facial features, and / or other parts). Furthermore, a camera may detect the movement and position of display objects (e.g., props such as toy swords).

[0026] With the foregoing in mind, Figure 2 shows a schematic plan view of an illusion system 10 according to an embodiment of the present disclosure, which is observable by a viewer or visitor 62 and generates a real image 60 based on a 2D image source 20 (e.g., 2D source 20). As used herein, the 2D source can be a 2D image or projection used to generate the real image 60. For example, the 2D source can include a 2D image illuminated by one or more LED string lights. Alternatively, the 2D source 20 can include a projection generated by a screen projector or other 2D image provider. Furthermore, the positioning of the 2D source 20 can be configured based on a controller 14 receiving commands from one or more sensors 12 indicating the expected position of the real image 60. Based on the commands from the controller 14, actuators 22 can adjust the movement of the 2D source 20 (e.g., string lights, projector, or display). The 2D source 20 can generate a light beam 54 that defines the 2D image. In Figure 2, the two lines representing the light beam 54 are intended to represent the edges of the provided 2D image, but it should be noted that the light beam 54 also includes the light beam between the two lines, and these can be considered to form the body of the provided 2D image.

[0027] As shown in Figure 2, the beam splitter 56 can be positioned with a surface that extends laterally with respect to the direction of the light beam 54 emitted from the 2D source 20. The light beam 54 is shown expanding from the 2D source 20 toward the beam splitter 56 while diverging. A portion of the light beam 54 from the 2D source 20 can be reflected from the beam splitter 56 and directed toward a retroreflector 58 located behind the beam splitter 56 toward visitors (e.g., viewers) 62. The beam splitter 56 can be partially or completely transparent and can be made of any suitable material such as glass or plastic. For example, the beam splitter 56 may be partially mirrored, but both reflective and transmissive properties are used by the beam splitter 56 in the illusion system 10 to provide the desired effect, so it must be able to transmit light through it. The amount of reflection by the beam splitter 56 can depend on the angle of incidence to the light beam 56.

[0028] As described above, the retroreflector 58 can be a device or surface that reflects light with very limited scattering and returns it to its point of origin. That is, the retroreflector 58 can receive each light beam 54 at a specific angle, reflect each light beam 54 and return it essentially to its point of origin (e.g., beam splitter 56) at that specific angle. The retroreflector 58 can be any appropriate size, shape, or color. For example, the retroreflector 58 can be a screen or a sheet. A portion of the light beam 54 reflected from the retroreflector 58 passes through the beam splitter 56, travels toward the visitor 62, and is focused to form an image of the 2D source 20 (e.g., a real image 60). A real image or spatial image can be produced when the light beam appears to be focused to a point in space. To the visitor 62, the image of the 2D source 20 may appear to be floating in the air or supported by something in the environment (depending on the positioning of other features). To the visitors 62, the real image 60 appears to be floating in the air (or somehow engaged with a physical object present in the viewing area), but the real image 60 can be a specular reflection of the image of the 2D source 20 with respect to the beam splitter 56.

[0029] Figure 3 shows a schematic plan view of an illusion system 10 in a configuration that generates a real image 60 based on a 3D image source 20 (e.g., 3D source 20) according to an embodiment of the present disclosure. In some embodiments, the 3D source 20 may include a physical or 3D object illuminated by a light source (e.g., one or more LED string lights). By using an illuminated physical object as the 3D source 20, a real image 60 can be produced. In other embodiments, the 3D source 20 may provide two images of a physical object, one image for each eye of a visitor 62, so that the real image 60 appears to be a 3D image. Furthermore, the positioning of the 3D source 20 may be configured based on a controller 14 receiving commands from one or more sensors 12 indicating the expected position of the real image 60. Based on the commands from the controller 14, actuators 22 can adjust the movement of the 3D source 20 (e.g., string lights, projector, or display). A portion of the light beam 54 from the 3D source 20 can be reflected from the beam splitter 56 and directed to the retroreflector 58 in the same manner as described above with respect to Figure 2. As previously mentioned, the beam splitter 56 may be partially or completely transparent and can be made of any suitable material such as glass or plastic. As previously mentioned, the retroreflector 58 can be a device or surface that reflects light with very limited scattering and returns it to its point of origin. That is, the retroreflector 58 can receive each light beam 54 at a specific angle, reflect each light beam 54 back to its point of origin (e.g., the beam splitter 56) at a specific angle. The retroreflector 58 can be any suitable size, shape or color. A portion of the light beam 54 reflected from the retroreflector 58 can pass through the beam splitter 56 and be focused to form an image of the 3D source 20 (e.g., a real image 60). A real image 60 or spatial image can be generated when the light beam appears to converge to a point in space. To visitors 62, the image of the 3D source 20 may appear to be floating in the air or supported / connected to environmental features. The real image 60 can be a specular reflection of the image of the 3D source 20 around the beam splitter 56.

[0030] In some embodiments, the special effects of the illusion system 10 can be presented to viewers or visitors 62 while they are in a ride vehicle 134 moving along a ride track 136 (e.g., a path, rail track, guide rail, or moving space). Figure 4 shows a schematic plan view of the illusion system 10 depicting a ride vehicle 134 moving through a real image 60. In Figure 4, the image source 20 can be a 2D or 3D source. The positioning of the image source 20 can be configured based on the controller 14 receiving commands from one or more sensors 12 indicating the expected position of the real image 60. Based on the commands from the controller 14, the actuator 22 can adjust the movement of the 2D source 20 (e.g., string lights, projector, or display). Similar to the embodiments described above, the illusion system 10 can cause visitors 62 (for example, visitors 62 riding in a ride vehicle 134) to perceive that images from the 2D or 3D source 20 are physically present in the environment (for example, sitting on a ride track 136 or floating in the air).

[0031] As the vehicle 134 moves along the vehicle track 136, during the ride experience provided by the illusion system in Figure 4, the vehicle 134 can pass through a real image 60 (or more specifically, a focal point corresponding to where the real image 60 appears to be located in the environment) generated through the interaction of the light beam 54 with the beam splitter 56 and retroreflector 58. As the vehicle 134 moves through the real image 60, it may appear to the visitor 62 inside the vehicle 135 that the real image 60 transitions to an inverted form of the real image 60 relative to what they were seeing before passing through it, which may confuse the visitor 62. For example, if the real image 60 represents a projection of a house, the house may appear to the visitor 62 to be inverted as it passes through the real image 60 via the vehicle 134 moving along the vehicle track 136. To avoid this, the controller 14 can invert (e.g., project) the media provided to the image source 20 when the vehicle 134 moves through the real image 60. For example, if the image source 20 is a 2D source, the controller 14 can instruct a projector operating on the image source 20 to project an inverted image of the house. In this way, when the visitor 62 passes through the real image 60, the image of the house does not appear to be inverted compared to what the vehicle 134 saw before moving through the real image 60 (or focal point) as it moved along the vehicle track 136. In some embodiments, the media associated with the image source 20 can be turned off after the vehicle 134 and the visitor have passed through the real image 60 so that the visitor 62 can only see the real image 60 in front of them, and not from behind. For example, the projection of the house can be turned off after the visitor has passed through the real image 60. One or more sensors 12 can track the movement and position of the vehicle 134, which includes detecting when the vehicle 134 is approaching and / or passing through the real image 60.In response to receiving an indicator that the vehicle 134 is approaching, passing through, and / or has already passed through the real image 60, the controller 14 may invert or turn off the media associated with the image source 20 (e.g., deactivate or otherwise block viewing by visitors 62). In some embodiments, a structural feature may block viewing of the real image 60 immediately before or after passing through and transitioning to it. In some embodiments, the structural feature blocking the real image 60 may be dynamically activated based on the movement or position of the vehicle 134, determined via one or more sensors 12. Additionally, dynamic props may be used to distract visitors 62 from observing the real image 60 as it approaches or passes through it.

[0032] In an additional embodiment, instead of inverting the image source 20 as the vehicle passes the real image 60, or in addition to this, the controller 14 may control the image source 20 so that the real image 60 (e.g., reflection of an animation or dynamic prop) appears to the visitor 62 as if the real image 60 were broken or shattered. This may include inverting the supporting image or, as described above, relying on the dynamic nature of the image to prevent inversion resulting from the transition of the viewing point. As an example, the real image 60 might appear as a brick wall. When the controller 14 receives a command from one or more sensors 12 that the vehicle 134 and the visitor 62 are passing the real image 60 of the brick wall, the controller 14 may update the medium associated with the image source 20 to generate another real image of the brick wall 138 being shattered or broken. Specifically, for example, a screen projection of an intact brick wall may transition to a screen projection of a shattering brick wall. In some embodiments, a prop of a real brick wall can transition between an assembled configuration and a shattered configuration so that its reflection provides a real image 60. To create special effects that make visitors 62 feel as if they can physically interact with the real image 60, the controller 14 can activate haptics or motion profiles associated with the ride vehicle 134. For example, as the ride vehicle 134 passes over the real image 60 (e.g., representing the brick wall shattering or breaking), the ride vehicle 134 can shake to produce an effect that simulates the ride vehicle 134 colliding with a physical structure. Such haptic or motion effects may be performed in real time or based on predefined timing of the ride vehicle 134's movements. A tracking system based on one or more sensors 12 may be used to track the position and movement of visitors 62 (e.g., as the ride vehicle approaches the real image 60) and activate such effects. Furthermore, physical props may be included to support or supplement these effects. For example, actual physical props that look like particles from a wall can move around the vehicle environment.As another example, an opening 139 in the actual brick wall 138, which correlates with the image provided by the real image 60, can be created immediately after passing through the real image 60, giving the impression that the destruction of the brick wall depicted in the real image 60 resulted in the opening 139 in the actual brick wall 138. Similarly, other correlations can be provided between what is depicted in the real image 60 and what is provided in the vehicle environment.

[0033] In some embodiments, the special effects of the illusion system 10 may include a real image 60 that is adjusted in any of the following ways based on the position of the visitors 62 and / or the ride vehicles 134. This may include adjustment of the image source 20 (e.g., 2D source, 3D source), including physical manipulation of the image source 20 (e.g., repositioning the image source 20), controlled operation of the image source 20 (e.g., turning on some lights but not others), and operation of the medium provided by the image source 20 (e.g., displaying animated video clips). For example, the image source 20 may be adjusted so that the size of the generated real image 60 increases or decreases.

[0034] Figure 5 is a schematic elevation view of the illusion system 10, arranged so that its components are hidden from direct viewing by visitors 62 in order to enhance immersion in the experience. As shown in Figure 5, the image source 20 and retroreflector 58 can be hidden from visitors 62. That is, the image source 20 and retroreflector 58 can be positioned below the beam splitter 56 relative to visitors 62. As a result, when the ride vehicle 134 moves along the ride path 136, visitors 62 may not be able to see the image source 20 and retroreflector 58 by looking behind them. In this case as well, the immersion in the experience can be enhanced.

[0035] With the above in mind, Figure 6 is a schematic plan view of the illusion system 10 of Figure 1, which generates a real image 60 in combination with the Pepper's Ghost effect, according to an embodiment of the present disclosure. For example, the image source 20 may be associated with projecting a medium representing lightning. The positioning of the image source 20 can be configured based on the controller 14 receiving commands from one or more sensors 12 indicating the expected position of the real image 60. Based on the commands from the controller 14, the actuator 22 can adjust the movement of the 2D source 20 (e.g., string lights, projector, or display). As in the figure above, the light beam 54 reflected from the retroreflector 58 can pass through the beam splitter 56 and be focused to form a real image 60 based on the image source 20. The real image 60 or spatial image can be generated when the light beam 54 is focused to a point in space. To visitors 62, the real image 60 of lightning may appear to be floating in the air.

[0036] The retroreflector 58 may have a gray appearance, which may not be appealing to visitors 62. In some embodiments, the retroreflector 58 can be modified in terms of its visual appearance so that its appearance correlates thematically or visually with amusement park props, the environment, etc. The retroreflector 58 can be decorated to blend into the environment and appear inconspicuous to visitors 62. For example, a thin, translucent colored film can be placed between the retroreflector 58 and the viewer 62.

[0037] In additional or alternative embodiments, the retroreflector 58 can be hidden from visitors 62 to prevent visitors from noticing its original appearance (e.g., the appearance of a gray sheet). To hide the retroreflector 58 from the viewer's 62, a virtual image 152 can be generated via the Pepper's ghost effect in conjunction with a real image 60 generated via retroreflection. The Pepper's ghost effect utilizes the reflective properties of a translucent or transparent material (e.g., glass, plexiglass, plastic, or polyester foil), such as a beam splitter 56, to provide an image (e.g., a virtual image 152) for visitors 62 to see. The virtual image 152 shown in Figure 6 is shown where the viewer 62 would perceive it. However, this is actually a reflection of a source 153 located on the same side as the viewer 62 and the beam splitter 56. As described above, this can work in conjunction with providing the real image 60 to hide the properties of the retroreflector 58. For example, the beam splitter 56 can work in cooperation with the retroreflector 58 to provide a real image 60, while the source 153 can work in a different way with the beam splitter 56 to provide a virtual image 152 (or Pepper's ghost effect). Thus, visitors 62 can see the virtual image 52 or reflected image due to the Pepper's ghost effect in relation to the real image 60 from their viewing area. The retroreflector 58 is still visible from the visitor's line of sight through the glass of the beam splitter 56, but the visitor's attention can be directed not to the retroreflector 58, but to the reflected image or virtual image 152 associated with the Pepper's ghost effect. In some embodiments, the virtual image 152 can essentially cover or provide a pattern (e.g., an image of leaves) on the retroreflector. Thus, Pepper's ghost effect helps to conceal the retroreflector 58 or to divert the attention of visitors 62 from the retroreflector 58.

[0038] However, in order to prevent visitors 62 from being distracted from the real image 60 by Pepper's ghosting effect, the light intensity associated with the real image 60 can be made higher than the light intensity associated with the virtual image 152.

[0039] Figure 7 is a schematic plan view of an illusion system 10 that provides a shared viewing experience of an image using the Pepper's Ghost effect of Figure 6, according to an embodiment of the present disclosure. The positioning of the image source 20 can be configured based on the controller 14 receiving commands from one or more sensors 12 indicating the expected position of the real image 60. Based on the commands from the controller 14, actuators 22 can adjust the movement of the 2D source 20 (e.g., string lights, projector, or display). Unlike Figure 6, the light beam 54 from the image source 20 can first be transmitted through or passed through a beam splitter 56 and directed to a retroreflector 58. The retroreflector 58 can receive each light beam 54 at a specific angle and reflect each light beam 54 back to its point of origin (e.g., beam splitter 54) at a specific angle. A portion of the light beam 54 can be reflected and focused from the beam splitter 56 to form the image of the image source 20 as the real image 60. Therefore, visitors 172 can see the real image 60 based on the media associated with the image source 20. Furthermore, in relation to this retroreflective effect, the Pepper's ghost effect can also be implemented. That is, another visitor 176, who is on the opposite side of the beam splitter 56 from visitor 172, can see the virtual image 152 of the media associated with the image source 20. Thus, both visitors 172 and 176 can experience a shared viewing experience of the media associated with the image source 20.

[0040] Figure 8 is a schematic plan view of an illusion system 10 that generates a real image 60 with a narrow field of view, according to an embodiment of the present disclosure. For example, an amusement ride or game may include a puzzle, in which case the real image 60 may be visible only to visitors who find a clue or solve the puzzle. Finding a clue or solving the puzzle may include placing the visitor 62 in a specific position that allows observation of the real image 60 while excluding viewing by others who are not in that position. A collimator can be used as part of the image source 20 to narrow the field of view of the real image 60. As described above, the positioning of the image source 20 (e.g., including a collimator) can be configured on the controller 14 receiving commands from one or more sensors 12 indicating the expected position of the real image 60. Based on the commands from the controller 14, the actuator 22 can adjust the movement of the image source 20. The field of view can be defined as the range of angles or positions from which a visitor may be able to see the real image 60. As used herein, a collimator can be a device that narrows a light beam 54 (e.g., a narrow light beam used to generate a 2D or 3D real image), thereby narrowing the field of view of the real image 60. The narrow light beam 54 output from the collimator can be reflected from a beam splitter 56 and directed to a retroreflector 58. The retroreflector 58 can receive the narrow light beam 54 at a specific angle and reflect a single light beam 54 at a specific angle back to the point of origin (e.g., the beam splitter 56). The narrow light beam 54 reflected from the retroreflector 58 passes through the beam splitter 56 and is focused to form an image of the light source 52 (e.g., a real image 60). The real image 60 can be made visible to visitors 62. By narrowing the field of view, the real image 60 can be made invisible to other visitors near the visitor 62. That is, the real image 60 can only be seen from the position where the visitor 62 is located. Thus, if visitor 62 finds a hint for the amusement game, unlike nearby visitors who did not find the hint, they will be able to view the real image 60.

[0041] Figure 9 is a schematic plan view of an illusion system 10 that generates a real image with a rotating beam splitter 56 according to an embodiment of the present disclosure. In this illustrated embodiment, a ride vehicle 134 travels along a ride track 136, and the beam splitter 56 operates to rotate between positions (for example, based on or in time with the movement of the ride vehicle 134). By rotating the beam splitter 56, the viewing angle of the real image 60 may shift. As the ride vehicle 134 moves along the ride track 136, visitors 62 continue to view the real image 60. A controller 14 monitors or tracks the movement of the ride vehicle 134 via one or more sensors 12 and can command actuators 22 to move the beam splitter 56 as the ride vehicle 134 moves. Actuators 22 can be coupled to the beam splitter 56. Rather than needing to adjust the medium associated with the image source 20, the controller 14 can rotate the beam splitter 56 so that the viewing angle of the real image 60 changes, allowing visitors to see the real image 60 as the ride vehicle 134 moves relative to other aspects of the illusion system 10. In some embodiments, the controller 14 can command the rotation or movement of the beam splitter 56 at a speed similar to the movement of the ride vehicle 134.

[0042] Figure 10 is a schematic plan view of an illusion system 10 that generates a real image 60 using water as a beam splitter 180, according to one embodiment of the present disclosure. For example, water can be used as the beam splitter 180 in a water park or amusement park ride. The image source 20 and retroreflector 58 can be placed below the water surface. For example, the bottom of a pool can function as the retroreflector 58. The retroreflector 58 can receive each light beam 54 at a specific angle and reflect each light beam 54 at a specific angle back to its point of origin (e.g., the beam splitter 180). A portion of the light beam 54 reflected from the retroreflector passes through the beam splitter 180 (e.g., water) and is focused to form the image of the image source 20 (e.g., the real image 60). To visitors 62, the image of the image source 20 may appear to be floating in the air, floating on the water, or sitting on a surface (e.g., the edge of the pool). The positioning of the image source 20 can be adjusted based on the controller 14 receiving commands from one or more sensors 12 indicating the expected position of the real image 60 (for example, floating in water or located at the edge of a pool). Based on the commands from the controller 14, the actuator 22 can adjust the movement of the image source 20.

[0043] Furthermore, Figure 11 is a schematic plan view of an illusion system 10 that generates a real image 60 using a two-sided corner reflector array (DCRA) 200 as a beam splitter, according to an embodiment of the present disclosure. The DCRA 200 may include sheets of acrylic or glass. Unlike the retroreflector 58, the DCRA 200 receives a light beam 54 from an image source 20 at a specific angle. As in the figure above, the light beam 54 can be emitted from the image source 20 (e.g., a 2D source, a 3D source). The positioning of the image source 20 can be configured based on the controller 14 receiving commands from one or more sensors 12 indicating the expected position of the real image 60. Based on the commands from the controller 14, the actuator 22 can adjust the movement of the image source 20 (e.g., string lights, a projector, or a display). The light beam 54 can pass through or transmit through the DCRA 200 at an angle similar to the angle at which the light beam 54 was received. After passing through the DCRA200, the light beam 54 can be focused to form a real image 60. In some embodiments, the DCRA200 enables the generation of a real image 60 without generating any virtual images.

[0044] Since the real image 60 is provided to the audience for viewing by reflection and / or retroreflection, the lighting associated with the features of the displayed 2D and / or 3D image (e.g., a character moving in space) may not correlate in the way the audience would expect the actual features to be. Retroreflection techniques using an image source 20 (e.g., a lamp, flashlight, flame, or other light source) may result in no light and corresponding shadows being generated in the real image 60. For example, a real image 60 of a character standing in space can be displayed to the audience. However, since the real image 60 does not block light passing through space, it may not be able to generate shadows. The real image 60 may appear unrealistic to an audience who expects a character standing in space to cast a shadow. To enhance the realism of the real image 60 and provide the audience with a sense of immersion, the illusion system 10 can be used to illuminate all surfaces of space except where there would be shadows of the real image 60 if the real image 60 were a physical object. With the foregoing in mind, Figure 12 is a schematic diagram of an illusion system 10 that provides an immersive effect (e.g., casting shadows 252, generating refraction effects 254) by adjusting the lighting associated with the image source 20.

[0045] The image source 20 can be coupled to any number or type of decorative lighting element 250 that provides an immersive effect on the real image 60 (e.g., casting a shadow 252, producing a refraction effect 254). In some embodiments, the decorative lighting element 250 may include a filter 256 that covers a portion of the image source 20 to cast a shadow 252 on the real image 60. For example, after determining the position of the lighting or image source 20 and the expected position of the shadow 252 that would be cast by the real image 60 if it were a tangible or physical object (e.g., a character), the controller 14 can instruct the actuator 22 to position the filter 256 (e.g., a silhouette of a character) on the image source 20 from which the shadow 252 is expected to be cast. The filter 256 can be any suitable opaque material that prevents light from passing through the image source 20, thereby allowing the character's shadow 252 to appear on the real image 60.

[0046] In additional and / or alternative embodiments, these immersive effects (e.g., shadows 252) can be animated to update in accordance with the position and / or shape of the real image 60, the image source 20, and the decorative lighting element 250, as well as in the physical space where the real image 60 is displaced and the image source 20 is positioned. In some embodiments, the adjustment of the image source 20 and / or decorative lighting element 250 can be based on pre-calculation of the lighting in the environment to generate the immersive effect. In other embodiments, the updates of the image source 20 and / or decorative optical element 250 can be calculated in real time based on changes in the lighting in the environment to generate the immersive effect. For example, one or more sensors 12 can monitor the position of the image source 20 and changes in the lighting in the environment or physical space. Based on such lighting information from one or more sensors 12, the controller 14 can dynamically adjust the position, intensity, and other lighting characteristics of the image source 20 and / or decorative optical element 250 to cast shadows 252 on the real image 60 or generate other immersive effects.

[0047] In some embodiments, the environment in which the real image 60 is displayed may have airborne particles (e.g., dust, haze, or fog). With respect to such particles, the shadows 252 may be visible not only as bright and dark areas on the surface of the environment, but also as light and dark rays in the air caused by the particles. To enhance the immersive effect and increase realism in an environment with such particles, the position of the image source 20 may be positionally correlated with the decorative optical elements 250.

[0048] In other embodiments, two or more real images 60 and decorative optical elements 250 can be displayed to the audience. The decorative optical elements 250 can be part of the physical space or part of the real image 60. In some embodiments, the decorative optical elements 250 are expected to cast shadows 252 of one object onto another object in physical space, so the position and orientation of each object and decorative optical element 250 can be tracked to calculate where shadows may be cast in physical space. Thus, objects with shadows can be illuminated digitally or physically, and the corresponding real image 60 of the object can have dark areas where shadows may be cast.

[0049] In some embodiments, the real image 60 can be an object that can emit light (e.g., a fireball, lightning). Since the real image 60 may not emit light in all directions as a fireball or lightning can actually do, the real image 60 of a fireball or lightning may appear unrealistic to the viewer. Similar to the use of the illusion system 10 when generating a real image 60 of a character that may cast a shadow, the illusion system 10 can be used to illuminate the surface of the physical space in which the real image 60 (e.g., a fireball, lightning) is displayed and correlate it with the effect that would have been seen if the real image 60 could emit light.

[0050] In additional embodiments, the real image 60 can be generated on a refractive surface (e.g., water, glass surface 258). Thus, the illusion system 10 may include decorative optical elements 250 that produce refractive properties 254 associated with the refractive surface (e.g., water, glass 258). For example, due to the refractive properties 254, the viewer may appear to see past the beam splitter 56 and into the physical space behind the beam splitter 56. The real image 60 may appear to refract light in a similar manner as if the real image 60 were a physical object in water, glass 258, or another refractive surface. If the real image 60 is generated via illumination of a physical object, a physical set on which the physical object can be placed (e.g., water, glass 258) can be positioned behind the physical object to produce refractive properties 254 that are effective with respect to the real image 60.

[0051] Figures 13A and 13B are schematic plan views of an illusion system 10 according to an embodiment of the present disclosure, which generates a real image 60 using two beam splitters 56, two image sources 20, and two retroreflectors 58. As shown, the positioning of the two beam splitters 56, two image sources 20, and two retroreflectors 58 allows the viewer 62 to see the real image 60 and virtual image 152 from both sides of the beam splitters 56. Specifically, Figure 13A represents viewing from a first side, and Figure 13B represents viewing from a second side (opposite side to the first side). In some embodiments, the real image 60 appears to move from one side of the beam splitter 56 to the other side of the beam splitter 56 (e.g., the opposite side). By using at least two beam splitters 56, two image sources 20, and two retroreflectors 58, the real image 60 appears to move essentially seamlessly from one side of the beam splitter 56 to the other. Employing two beam splitters 56 in the configuration shown in Figures 13A and 13B provides a more fluid and continuous representation of the real image 60 compared to using a single beam splitter 56, which leaves a viewing area substantially inaccessible in the vicinity of the single beam splitter 56. Furthermore, the configurations in Figures 13A and 13B allow the viewer 62 to see the same real image 60 from either side of the beam splitter 56.

[0052] Furthermore, if the real image 60 is generated via a digital device (e.g., a 2D screen, projector), a computer-based simulation can be performed to determine how the real image 60 would appear refracted from a visitor's specific viewpoint if it were a physical object (e.g., by calculating the refractive characteristics 254 via the controller 14). The controller 14 can track the visitor's position and calculate the refractive characteristics 254 from the visitor's viewpoint. The refractive characteristics 254 may appear different or not entirely accurate from other viewpoints that are not correlated with the visitor's viewpoint.

[0053] To ensure that the refractive characteristics 254 are accurate regardless of the viewing position or specific viewpoint, in some embodiments, the real image 60 can be generated using a light field display. Using a light field display, the controller 14 can calculate how the real image 60 would appear refracted from any viewpoint from which the real image 60 can be seen, if it were a physical object (for example, by calculating the refractive characteristics 254). Thus, instead of tracking the location of visitors, the controller 14 can use a light field display to provide immersive effects such as accurate refractive characteristics 254.

[0054] Furthermore, the aforementioned immersive effects (e.g., casting shadows 252, creating refraction effects 254) can be applied simultaneously to the Pepper's Ghost effect in combination with the real image 60, so that both images (e.g., the virtual image from the Pepper's Ghost effect and the real image 60) appear to be emitting light, refracting light, and / or casting shadows. That is, a viewer looking at the real image 60 and another viewer looking at the virtual image from the Pepper's Ghost effect can perceive the real image 60 and the virtual image as if the corresponding physical objects were behaving in reality (e.g., casting shadows 252, refracting light). In some embodiments, the illusion system 10 may include a controller 14 calculating position, intensity, and other parameters related to auxiliary lighting, projection mapping, and other lighting effects based on any viewpoint or viewing position of both viewers. The view of the Pepper's Ghost effect is enhanced as well as the view of the real image 60, so that both the virtual image and the real image 60 appear to cast shadows 252 and refract light. Furthermore, it is understandable that real images can be generated using immersive effects that utilize technologies including retroreflection, DCRA, and light field displays.

[0055] While only specific features of the present invention have been illustrated and described herein, those skilled in the art will be able to conceive of numerous variations and modifications. Therefore, it should be understood that the appended claims are intended to protect all such modifications and modifications that fall within the true technical spirit of the disclosure. The methods presented and described in the claims herein are referenced to and applied to substantial purposes and specific embodiments of a practical nature that clearly improves the art of the present invention, and are therefore not abstract, intangible, or truly theoretical. Furthermore, if any claim appended to the end of this specification contains one or more elements designated as "means for performing a function" or "steps for performing a function," such elements shall be construed in accordance with Section 112(f) of the United States Patent Act. However, any claim containing elements designated in any other way shall not be construed in accordance with Section 112(f) of the United States Patent Act. [Explanation of symbols]

[0056] 12 Tracking Sensors 14 Controllers 22 Actuators 20 Image Sources

Claims

1. It is an illusion system, An image source configured to project a light beam, Retroreflector, A beam splitter positioned between the retroreflector and the viewing area, wherein the beam splitter is configured to receive a light beam from the image source and reflect the light beam toward the retroreflector, and the retroreflector is configured to reflect the light beam toward the beam splitter and back through the beam splitter in order to define a real image for the viewer within the viewing area. A controller configured to control the image source and adjust the attributes of the real image as seen from the viewing area based on control parameters detected by at least one sensor, An additional image source configured to cooperate with the beam splitter to provide a Pepper's ghost effect in conjunction with the real image whose attributes as seen from the viewing area provided by the image source, the beam splitter, and the retroreflector are adjusted, An illusion system equipped with this feature.

2. The illusion system according to claim 1, comprising at least one sensor configured to detect the position of an object for determining the position of the real image, wherein the controller is configured to control the image source to provide the real image so that it appears to be spatially related to the object.

3. The illusion system according to claim 2, wherein the controller commands an actuator to move the image source, and the position of the intersecting light beams that define the real image is correlated with the position of the object.

4. The illusion system according to claim 1, wherein the at least one sensor includes a camera configured to detect a position including the orientation of an object for determining the position of the real image.

5. The illusion system according to claim 1, wherein the image source includes a light assembly and an actuator configured to mechanically move at least a portion of the light assembly based on a command from the controller.

6. The illusion system according to claim 1, wherein the image source includes a light assembly configured to operate an output for controlling an image provided by the image source based on a command from the controller.

7. The illusion system according to claim 6, wherein the light assembly includes a liquid crystal display, a light matrix, a plurality of light strings, a strip of light-emitting diodes, a projector, or a combination thereof.

8. The illusion system according to claim 1, wherein the beam splitter includes glass, plexiglass, plastic, water, a two-sided corner reflector array (DCRA), or a combination thereof.

9. The illusion system according to claim 1, comprising a vehicle capable of moving to pass through the position where the light beams defining the real image intersect, wherein the controller is configured to change or disable the presentation of the real image in response to the position of the vehicle relative to the position of the intersecting light beams.

10. The illusion system according to claim 1, wherein the beam splitter is rotatable, and the controller is configured to control the movement of the beam splitter based on the detected movement of a visitor or a ride vehicle.

11. The illusion system according to claim 1, wherein the beam splitter is configured to reflect at least 80% of the light beam toward the retroreflector.

12. A method for providing a real image using an illusion system, The steps include projecting a light beam from an image source, The steps include receiving the light beam from the image source at a beam splitter positioned between the retroreflector and the viewing area, and reflecting the light beam from the beam splitter toward the retroreflector, The steps include passing the light beam from the retroreflector toward the beam splitter and reflecting it to determine a real image for the viewer within the viewing area, The steps include controlling the image source to adjust the attributes of the real image as seen from the viewing area based on control parameters detected by at least one sensor, A method comprising the step of providing a Peppers ghost effect by projecting an additional light beam from an additional image source onto the beam splitter, wherein the additional image source is configured to cooperate with the beam splitter to provide a Peppers ghost effect in conjunction with the real image whose attributes as seen from the viewing area are adjusted, provided by the image source, the beam splitter, and the retroreflector.

13. The method according to claim 12, wherein the step of reflecting the light beam from the beam splitter toward the retroreflector includes the step of reflecting about 90% of the light beam and allowing about 10% of the light beam to pass through the beam splitter.

14. The method according to claim 12, comprising the step of activating a physical effect in conjunction with the step of controlling the image source based on the control parameters.

Images