Eric Fossum

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Eric R. Fossum (born October 17, 1957) is an Emmy award-winning American engineer and professor, who co-developed some of the active pixel image sensor with intra-pixel charge transfer, with the help of other scientists from the NASA Jet Propulsion Laboratory. [1] He is currently a professor at Thayer School of Engineering in Dartmouth College.

Contents

Early years and education

Fossum was born at Hartford Hospital and raised in Simsbury, Connecticut and attended public school there. He graduated from Simsbury High School. He also spent Saturdays at the Talcott Mountain Science Center in Avon, CT, which he credits for his lifelong interest in science, engineering, and mentoring students. He received his B.S. in engineering from Trinity College in 1979, and his Ph.D. in electrical engineering from Yale University in 1984. In 2014, he received an honorary doctor of science degree from his undergraduate school, Trinity College. [2]

Academic career

During the 4th year of his PhD, Eric R. Fossum became an acting instructor at Yale University. [3] After graduating Yale, the now Dr. Fossum became a member of the Electrical Engineering faculty at Columbia University from 1984 to 1990. At Columbia University, he and his students performed research on CCD focal-plane image processing and high speed III-V CCDs. In 1990, Dr. Fossum left his university professorship and joined the NASA Jet Propulsion Laboratory, California Institute of Technology to manage JPL's image sensor and focal-plane technology research and advanced development.

In 2007 he co-sponsored the Trinity College Fire-Fighting Robot Contest, [4] aimed at increasing innovation and invention in the world of robotics.

He joined the Thayer School of Engineering at Dartmouth in 2010, where he currently teaches, performs research on the Quanta Image Sensor [5] with his graduate students, and coordinates the Ph.D. Innovation Program. [6] He also serves as Vice Provost for Entrepreneurship and Technology Transfer.

Since 1987, Eric has supervised 23 doctoral dissertations throughout his faculty positions at Columbia and Dartmouth. [3]

Invention

While Fossum was at NASA's Jet Propulsion Laboratory (JPL), then-NASA Administrator Daniel Goldin invoked a plan of "Faster, Better, Cheaper" for NASA Space Science missions. One of the instrument goals was to miniaturize charge-coupled device (CCD) camera systems onboard interplanetary spacecraft. In response, throughout the early 1990s, the JPL team including Fossum, Sunetra Mendis and Sabrina E Kemeny, made some changes to the already invented CMOS active-pixel sensor (APS). They implemented Dr. Nobukazu Teranishi's pinned photo diode invention in on chip as camera-on-a-chip technology. They also included other invented technologies by other people, such as a sample and hold in the sensor chip. [7] [8]

Based on these changes and additions, the JPL team made their first image sensor. The same year, he co-authored an extensive paper broadly defining the active-pixel sensor (APS) and giving a historical overview of the technology.[ citation needed ] The invention of APS technology was done by the Japanese companies Olympus and Toshiba during the mid-to-late 1980s, noting the former developed the vertical APS structure with NMOS transistors and the latter developed the lateral APS structure with PMOS transistors. The JPL team was the first to fabricate a practical APS outside of Japan, while making several key improvements to APS technology. The JPL sensor used a lateral APS structure similar to the Toshiba sensor, but was fabricated with CMOS (complementary metal-oxide-semiconductor) transistors rather than PMOS transistors. [9] This made JPL's APS device the first CMOS sensor with intra-pixel charge transfer. [10]

In 1994, JPL image sensor team proposed an improvement to the CMOS sensor: the integration of the pinned photodiode (PPD). A CMOS sensor with PPD technology was first fabricated in 1995 by a joint JPL and Kodak team that included Fossum along with P.P.K. Lee, R.C. Gee, R.M. Guidash and T.H. Lee. Further refinements to the CMOS sensor with PPD technology between 1997 and 2003 led to CMOS sensors achieve imaging performance on par with CCD sensors, and later exceeding CCD sensors. [10]

As part of Goldin's directive to transfer space technology to the public sector whenever possible, JPL led the CMOS APS development and subsequent transfer of the technology to US industry, including Eastman Kodak, AT&T Bell Labs, National Semiconductor and others. Despite initial skepticism by entrenched CCD manufacturers, the CMOS image sensor technology is now used in almost all cell-phone cameras, many medical applications such as capsule endoscopy and dental x-ray systems, scientific imaging, automotive safety systems, DSLR digital cameras and many other applications. About 8 billion cameras are manufactured each year using CMOS technology. [11]

Entrepreneur

In 1995, frustrated by the slow pace of the technology's adoption, Fossum and then-wife Dr. Sabrina Kemeny co-founded Photobit Corporation with 3 other co-founders to commercialize the technology. [12] Fossum left JPL to join Photobit full-time in 1996.

In late 2001, Micron Technology Inc. acquired Photobit Corp. and Dr. Fossum was named a Senior Micron Fellow and remained with Micron for about a year before his first retirement.

In 2005, he joined SiWave Inc., a developer of MEMS technology for mobile phone handsets, as CEO. SiWave was renamed Siimpel and grew substantially before his departure in 2007. Fossum claimed to have raised over $25M in financing during his tenure as CEO, adding to Siimple's total $65M in funding over its lifetime. [13] But ultimately, a severely damaged Siimpel was acquired three years later by Tessera for only $15M. [14]

In 1986, he co-founded the IEEE Workshop on CCDs, now known as the International Image Sensor Workshop (IISW). In 2007, with Nobukazu Teranishi and Albert Theuwissen, he co-founded and was the first President of the International Image Sensor Society (IISS) [15] which operates the IISW. Dr. Fossum currently sits on the Governance Advisory Committee at IISS.

His most recent entrepreneurial pursuit was in 2017 when Fossum co-founded Gigajot Technology, Inc. with two former Dartmouth PhD students, Dr. Saleh Masoodian and Dr. Jiaju Ma, to commercialize the Quanta Image Sensor (QIS) technology developed in his lab at Dartmouth College. [16] [17] [18]

Achievements and awards

Eric R. Fossum has published over 300 technical papers, [19] and holds more than 180 U.S. patents. [20] He is a Fellow member of the IEEE. He has been primary thesis adviser to a number of graduated Ph.D.s.

He has received several prizes and honors including:

Related Research Articles

<span class="mw-page-title-main">Charge-coupled device</span> Device for the movement of electrical charge

A charge-coupled device (CCD) is an integrated circuit containing an array of linked, or coupled, capacitors. Under the control of an external circuit, each capacitor can transfer its electric charge to a neighboring capacitor. CCD sensors are a major technology used in digital imaging.

<span class="mw-page-title-main">Photodiode</span> Converts light into current

A photodiode is a semiconductor diode sensitive to photon radiation, such as visible light, infrared or ultraviolet radiation, X-rays and gamma rays. Photodiode is a PN semiconductor material that produces current or voltage Photovoltaics when it absorbs photons Semiconductor Optoelectronics . The physics of electron excitation for photodiodes are similar to Photoconductivity typically implemented as a Photoresistor or as switches in Thyristor#Photothyristors. Photodiodes can be used for detection and measurement applications, or optimized for the generation of electrical power in solar cells. Photodiodes are used in a wide range of applications throughout the electromagnetic spectrum from IR, visible light, UV photocells to gamma ray spectrometers.

Digital image processing is the use of a digital computer to process digital images through an algorithm. As a subcategory or field of digital signal processing, digital image processing has many advantages over analog image processing. It allows a much wider range of algorithms to be applied to the input data and can avoid problems such as the build-up of noise and distortion during processing. Since images are defined over two dimensions digital image processing may be modeled in the form of multidimensional systems. The generation and development of digital image processing are mainly affected by three factors: first, the development of computers; second, the development of mathematics ; third, the demand for a wide range of applications in environment, agriculture, military, industry and medical science has increased.

<span class="mw-page-title-main">Sensor</span> Converter that measures a physical quantity and converts it into a signal

A sensor is a device that produces an output signal for the purpose of detecting a physical phenomenon.

LBCAST is a type of photo sensor which the manufacturer claims is simpler and thus smaller and faster than CMOS sensors. It was developed over ten years by Nikon, in parallel with other manufacturer's development of CMOS, and resulted in shipping product in 2003.

Digital imaging or digital image acquisition is the creation of a digital representation of the visual characteristics of an object, such as a physical scene or the interior structure of an object. The term is often assumed to imply or include the processing, compression, storage, printing and display of such images. A key advantage of a digital image, versus an analog image such as a film photograph, is the ability to digitally propagate copies of the original subject indefinitely without any loss of image quality.

<span class="mw-page-title-main">Video camera</span> Camera used for electronic motion picture acquisition

A video camera is an optical instrument that captures videos, as opposed to a movie camera, which records images on film. Video cameras were initially developed for the television industry but have since become widely used for a variety of other purposes.

A digital image is an image composed of picture elements, also known as pixels, each with finite, discrete quantities of numeric representation for its intensity or gray level that is an output from its two-dimensional functions fed as input by its spatial coordinates denoted with x, y on the x-axis and y-axis, respectively. Depending on whether the image resolution is fixed, it may be of vector or raster type. By itself, the term "digital image" usually refers to raster images or bitmapped images.

<span class="mw-page-title-main">Photodetector</span> Sensors of light or other electromagnetic energy

Photodetectors, also called photosensors, are sensors of light or other electromagnetic radiation. There are a wide variety of photodetectors which may be classified by mechanism of detection, such as photoelectric or photochemical effects, or by various performance metrics, such as spectral response. Semiconductor-based photodetectors typically use a p–n junction that converts photons into charge. The absorbed photons make electron–hole pairs in the depletion region. Photodiodes and photo transistors are a few examples of photo detectors. Solar cells convert some of the light energy absorbed into electrical energy.

In photography, shutter lag is the delay between triggering the shutter and when the photograph is actually recorded. This is a common problem in the photography of fast-moving objects or animals and people in motion. The term narrowly refers only to shutter effects, but more broadly refers to all lag between when the shutter button is pressed and when the photo is taken, including metering and focus lag.

<span class="mw-page-title-main">Image sensor</span> Device that converts images into electronic signals

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<span class="mw-page-title-main">Active-pixel sensor</span> Image sensor, consisting of an integrated circuit

An active-pixel sensor (APS) is an image sensor, which was invented by Peter J.W. Noble in 1968, where each pixel sensor unit cell has a photodetector and one or more active transistors. In a metal–oxide–semiconductor (MOS) active-pixel sensor, MOS field-effect transistors (MOSFETs) are used as amplifiers. There are different types of APS, including the early NMOS APS and the now much more common complementary MOS (CMOS) APS, also known as the CMOS sensor. CMOS sensors are used in digital camera technologies such as cell phone cameras, web cameras, most modern digital pocket cameras, most digital single-lens reflex cameras (DSLRs), mirrorless interchangeable-lens cameras (MILCs), and lensless imaging for cells.

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Michael Tompsett is a British-born physicist, engineer, and inventor, and the founder director of the US software company TheraManager. He is a former researcher at the English Electric Valve Company, who later moved to Bell Labs in the United States. Tompsett invented CCD imagers and designed and built the first ever video camera with a solid-state (CCD) sensor. Tompsett received the Queen Elizabeth Prize for Engineering in 2017, with Eric Fossum, George Smith, and Nobukazu Teranishi. Tompsett has also received two other lifetime awards; the New Jersey Inventors Hall of Fame 2010 Pioneer Award, and the 2012 IEEE Edison Medal. The thermal-imaging camera tube developed from his invention also earned a Queen's Award in 1987.

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sCMOS are a type of CMOS image sensor (CIS). These sensors are commonly used as components in specific observational scientific instruments, such as microscopes and telescopes. sCMOS image sensors offer extremely low noise, rapid frame rates, wide dynamic range, high quantum efficiency, high resolution, and a large field of view simultaneously in one image.

Orly Yadid-Pecht is a Professor of Electrical and Software Engineering and Alberta Innovates Technology Futures Strategic Chair of Integrated Intelligent Sensors at the University of Calgary. She develops CMOS based imaging devices for biomedical sensing. She is a Fellow of the Institute of Electrical and Electronics Engineers, SPIE and American Institute for Medical and Biological Engineering. She is an ASTech Award Winner for Technology. Yadid-Pecht holds several patents for new technologies, including sensors, health monitoring devices and drug delivery systems.

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  8. e.g. US Patents 5,471,515 and 5,841,126
  9. Fossum, Eric R. (12 July 1993). Blouke, Morley M. (ed.). "Active pixel sensors: are CCDs dinosaurs?". SPIE Proceedings Vol. 1900: Charge-Coupled Devices and Solid State Optical Sensors III. Charge-Coupled Devices and Solid State Optical Sensors III. 1900. International Society for Optics and Photonics: 2–14. Bibcode:1993SPIE.1900....2F. CiteSeerX   10.1.1.408.6558 . doi:10.1117/12.148585. S2CID   10556755.
  10. 1 2 Fossum, Eric R.; Hondongwa, D. B. (2014). "A Review of the Pinned Photodiode for CCD and CMOS Image Sensors". IEEE Journal of the Electron Devices Society. 2 (3): 33–43. doi: 10.1109/JEDS.2014.2306412 .
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