phys586-lec05
... We’ll cover these later in the course as well – probably through a student talk The idea is that charge proportional to the x-rays received is stored on a capacitor The charges are conducted out by transistors one row at a time and subsequently amplified, multiplexed, and ...
... We’ll cover these later in the course as well – probably through a student talk The idea is that charge proportional to the x-rays received is stored on a capacitor The charges are conducted out by transistors one row at a time and subsequently amplified, multiplexed, and ...
Introduction to electron microscopy Transmission electron
... Patented by M. von Ardenne in 1937 The first commercial SEM in 1965 ...
... Patented by M. von Ardenne in 1937 The first commercial SEM in 1965 ...
More about LED
... Light Emitting Diode is now a part of our life. As a simple indicator to TV monitor, LED has its significant role in modern electronics. Some LED Physics The LED has a semiconductor chip placed in its centre. The semiconductor consists of two regions namely a P region that has positive charge carrie ...
... Light Emitting Diode is now a part of our life. As a simple indicator to TV monitor, LED has its significant role in modern electronics. Some LED Physics The LED has a semiconductor chip placed in its centre. The semiconductor consists of two regions namely a P region that has positive charge carrie ...
EE 230: Optical Fiber Communication Lecture 11
... Diffused structures tend to have lower dark current than mesa etched structures although they are more difficult to integrate with electronic devices because an additional high temperature processing step is required. ...
... Diffused structures tend to have lower dark current than mesa etched structures although they are more difficult to integrate with electronic devices because an additional high temperature processing step is required. ...
Electron
... Wave nature of electrons • 1897, J.J. Thomson • Concludes that electrons have particle nature. ...
... Wave nature of electrons • 1897, J.J. Thomson • Concludes that electrons have particle nature. ...
Electrons and Photons
... scale and from residual concentrations of water molecules. The water molecules absorb light near specific wavelengths. In between these wavelengths, windows of lower attenuation are formed at = 1300 nm and 1500 nm. A good picture of this situation is shown in Fig. 2.2 for state of the art optica ...
... scale and from residual concentrations of water molecules. The water molecules absorb light near specific wavelengths. In between these wavelengths, windows of lower attenuation are formed at = 1300 nm and 1500 nm. A good picture of this situation is shown in Fig. 2.2 for state of the art optica ...
Photomultiplier
Photomultiplier tubes (photomultipliers or PMTs for short), members of the class of vacuum tubes, and more specifically vacuum phototubes, are extremely sensitive detectors of light in the ultraviolet, visible, and near-infrared ranges of the electromagnetic spectrum. These detectors multiply the current produced by incident light by as much as 100 million times (i.e., 160 dB), in multiple dynode stages, enabling (for example) individual photons to be detected when the incident flux of light is very low. Unlike most vacuum tubes, they are not obsolete.The combination of high gain, low noise, high frequency response or, equivalently, ultra-fast response, and large area of collection has maintained photomultipliers an essential place in nuclear and particle physics, astronomy, medical diagnostics including blood tests, medical imaging, motion picture film scanning (telecine), radar jamming, and high-end image scanners known as drum scanners. Elements of photomultiplier technology, when integrated differently, are the basis of night vision devices.Semiconductor devices, particularly avalanche photodiodes, are alternatives to photomultipliers; however, photomultipliers are uniquely well-suited for applications requiring low-noise, high-sensitivity detection of light that is imperfectly collimated.