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An Andotrope is a device that allows viewing of a two-dimensional video from any direction, without limiting it to a specific perspective as with conventional screens.
The device is named after its inventor, Mike Ando, with the suffix -trope (Ancient Greek τρόπος, "turning"). The idea came to Ando from Gehn’s Holographic Imager in the computer game Riven – The Sequel to Myst. [1] The Andotrope is a replica of this device, but differs from a technical perspective in that the image is not a three-dimensional hologram.
According to Ando, the device updates "a 150-year-old children’s toy into the 21st century.” [2] The functionality of an Andotrope is similar to a Zoetrope, but differs technically on several key points.
The device is built from a cylindrical housing containing at least one fixed screen. The cylinder has a slot for each screen that allows it to be viewed from outside. When at least two screens are used, the content must be synchronized to show the same image at the same time. This case is attached to a rotating electric turntable to create the stroboscopic effect of a film projector, whereby a linear sequence of images becomes a fluid video. Ando states that his device can reach 1200 revolutions per minute, and with two screens, can show a video at approximately 40 frames per second. [1]
According to Ando, important requirements for the screens are:
The invention was met with a generally positive reception. For example, the Australian Diyode Magazine published an interview with Ando covering the device and process of its invention. [3] The German magazine Coolsten also covered the Andotrope. [4] The YouTube channel The Action Lab released a video in November 2024 covering the use of 3D printing and two smartphones in creating its own Andotrope. [5]
A zoetrope is a pre-film animation device that produces the illusion of motion, by displaying a sequence of drawings or photographs showing progressive phases of that motion. A zoetrope is a cylindrical variant of the phénakisticope, an apparatus suggested after the stroboscopic discs were introduced in 1833. The definitive version of the zoetrope, with replaceable film picture film strips, was introduced as a toy by Milton Bradley in 1866 and became very successful.
Stereoscopy is a technique for creating or enhancing the illusion of depth in an image by means of stereopsis for binocular vision. The word stereoscopy derives from Greek στερεός (stereos) 'firm, solid' and σκοπέω (skopeō) 'to look, to see'. Any stereoscopic image is called a stereogram. Originally, stereogram referred to a pair of stereo images which could be viewed using a stereoscope.
Riven: The Sequel to Myst is a puzzle adventure video game, the second in the Myst series of games. Developed by Cyan Worlds, it was initially published by Red Orb Entertainment, a division of Broderbund. Riven was distributed on five compact discs and released for Mac and Windows personal computers on October 31, 1997, in North America; it was later released on a single DVD-ROM in 1998. Riven was also ported to several other platforms. The story of Riven is set after the events of Myst. Having been rescued from the efforts of his sons, Atrus enlists the help of the player character to free his wife from his power-hungry father, Gehn. Riven takes place almost entirely on the Age of Riven, a world slowly falling apart due to Gehn's destructive rule.
Myst is a franchise centered on a series of adventure video games. The first game in the series, Myst, was released in 1993 by brothers Rand and Robyn Miller and their video game company Cyan, Inc. The first sequel to Myst, Riven, was released in 1997 and was followed by three more direct sequels: Myst III: Exile in 2001, Myst IV: Revelation in 2004, and Myst V: End of Ages in 2005. A spinoff featuring a multiplayer component, Uru: Ages Beyond Myst, was released in 2003 and followed by two expansion packs.
A 3D display is a display device capable of conveying depth to the viewer. Many 3D displays are stereoscopic displays, which produce a basic 3D effect by means of stereopsis, but can cause eye strain and visual fatigue. Newer 3D displays such as holographic and light field displays produce a more realistic 3D effect by combining stereopsis and accurate focal length for the displayed content. Newer 3D displays in this manner cause less visual fatigue than classical stereoscopic displays.
A head-mounted display (HMD) is a display device, worn on the head or as part of a helmet, that has a small display optic in front of one or each eye. HMDs have many uses including gaming, aviation, engineering, and medicine.
Real-time computer graphics or real-time rendering is the sub-field of computer graphics focused on producing and analyzing images in real time. The term can refer to anything from rendering an application's graphical user interface (GUI) to real-time image analysis, but is most often used in reference to interactive 3D computer graphics, typically using a graphics processing unit (GPU). One example of this concept is a video game that rapidly renders changing 3D environments to produce an illusion of motion.
Time Traveler or Hologram Time Traveler is a LaserDisc interactive movie arcade game. It was designed by Dragon's Lair creator Rick Dyer, and released in 1991 by Sega. Its plot is that an American old west cowboy named Marshal Gram travels to various timelines to rescue Princess Kyi-La and defeat the evil time lord Vulcor. The game is best known for its arcade cabinet which displays a "holographic" like projection, produced using optical technology from Dentsu.
Mary Lou Jepsen is a technical executive and inventor in the fields of display, imaging, and computer hardware. She was the co-founder and first chief technology officer of One Laptop per Child (OLPC), and later founded Pixel Qi in Taipei, Taiwan, focused on the design and manufacture of displays. She founded and led two moonshots at Google X, and was an executive at Facebook / Oculus VR, leading an effort to advance virtual reality.
Autostereoscopy is any method of displaying stereoscopic images without the use of special headgear, glasses, something that affects vision, or anything for eyes on the part of the viewer. Because headgear is not required, it is also called "glasses-free 3D" or "glassesless 3D".
HoloVID is a measuring instrument, originally developed by Mark Slater for the holographic dimensional measurement of the internal isogrid structural webbing of the Delta family of launch vehicles in 1981.
Stephen Anthony Benton was the inventor of the rainbow hologram and a pioneer in medical imaging and fine arts holography. Benton held 14 patents in optical physics and photography, and taught media arts and sciences at Massachusetts Institute of Technology (MIT). He was the E. Rudge ('48) and Nancy Allen Professor of Media & Sciences, and the Director for Center for Advanced Visual Studies (CAVS) at MIT.
A holographic display is a type of 3D display that utilizes light diffraction to display a three-dimensional image to the viewer. Holographic displays are distinguished from other forms of 3D displays in that they do not require the viewer to wear any special glasses or use external equipment to be able to see the image, and do not cause a vergence-accommodation conflict.
The Myst series of adventure computer games deals with the events following the player's discovery of a mysterious book describing an island known as Myst. The book is no ordinary volume; it is a linking book, which serves as a portal to the world it describes. The player is transported to Myst Island and must unravel the world's puzzles in order to return home. Myst was a commercial and critical success upon release and spawned four sequels—Riven, Exile, Revelation and End of Ages— as well as several spinoffs and adaptations.
The Myst Reader is a collection of three novels based on the Myst series of adventure games. The collection was published in September 2004 and combines three works previously published separately: The Book of Atrus (1995), The Book of Ti'ana (1996), and The Book of D'ni (1997). The novels were each written by British science-fiction writer David Wingrove with assistance from Myst's creators, Rand and Robyn Miller.
A reflector sight or reflex sight is an optical sight that allows the user to look through a partially reflecting glass element and see an illuminated projection of an aiming point or some other image superimposed on the field of view. These sights work on the simple optical principle that anything at the focus of a lens or curved mirror will appear to be sitting in front of the viewer at infinity. Reflector sights employ some form of "reflector" to allow the viewer to see the infinity image and the field of view at the same time, either by bouncing the image created by lens off a slanted glass plate, or by using a mostly clear curved glass reflector that images the reticle while the viewer looks through the reflector. Since the reticle is at infinity, it stays in alignment with the device to which the sight is attached regardless of the viewer's eye position, removing most of the parallax and other sighting errors found in simple sighting devices.
Videotelephony as a concept began to materialize shortly after the telephone was patented in 1876, and its history is closely connected to that of the telephone.
Smartglasses or smart glasses are eye or head-worn wearable computers. Many smartglasses include displays that add information alongside or to what the wearer sees. Alternatively, smartglasses are sometimes defined as glasses that are able to change their optical properties, such as smart sunglasses that are programmed to change tint by electronic means. Alternatively, smartglasses are sometimes defined as glasses that include headphone functionality.
The Buckeye system is an operational airborne surveying system that provides high-resolution spatial imagery over an area of interest to support military operations involved with intelligence, surveillance, and reconnaissance. Once mounted on a helicopter or an unmanned aerial vehicle (UAV), it incorporates visual information from a digital camera and elevation data from a Light Detection and Ranging (LIDAR) system to create a two and three-dimensional colored map with orthorectified, 4 to 6-inch resolution.
Vergence-accommodation conflict (VAC), also known as accommodation-vergence conflict, is a visual phenomenon that occurs when the brain receives mismatching cues between vergence and accommodation of the eye. This commonly occurs in virtual reality devices, augmented reality devices, 3D movies, and other types of stereoscopic displays and autostereoscopic displays. The effect can be unpleasant and cause eye strain.
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