Opto Diode Corporation has recently announced the SXUV20C, a low-noise, extreme ultraviolet (EUV) photodetector that features a large 20 mm² circular active area. The new device has superior responsivity in the 1nm to 200 nm wavelength region, and is specially designed to be stable over long periods of time when exposed to high intensity EUV energy.
Opto Diode Corporation, an ITW company, announces the SXUV20C, a low-noise, extreme ultraviolet (EUV) photodetector that features a large 20 mm² circular active area.
Researchers from the Massachusetts Institute of Technology (MIT) and Australian National University have developed new technology that aims to make the Advanced Laser Interferometer Gravitational-Wave Observatory (LIGO) even more sensitive to faint ripples in space-time called gravitational waves.
Excelitas Technologies® Corp., a global technology leader delivering innovative, customized photonic solutions, will display its latest innovations in sensing and detection technology at the 2016 Sensors Expo & Conference in San Jose, CA. Among the products on display in Excelitas’ exhibit (Booth #1121) are the Next-Generation Low-Power DigiPyro® Motion, the Surface Mount 905 nm Pulsed Semiconductor Laser (SMD Laser), and the C30737 Silicon Avalanche Photo.
Xenics has recently introduced the fourth member of its high-resolution 'XenicsCores' Infrared OEM product family. The new Stirling-cooled XCO-640 MWIR module provides unprecedented thermal imaging stability and optical performance for perimeter surveillance, law enforcement and homeland security. At Eurosatory Xenics will exhibit in booth # FE288 in Hall 06 at the Belgium pavilion hosted by BSDI (Belgium Security & Defence Industry).
The new Series 9.5 avalanche photodiodes from First Sensor feature an increased sensitivity in the near infrared (NIR) wavelength range up to 950 nm. Due to its fast rise time and very low dark current the photodiodes are ideal for applications with low light intensities and high modulation frequencies such as laser rangefinding and laser scanning. The slow increase of the amplification with the applied reverse bias voltage of the Series 9.5 allows for easy and precise adjustments of high gain factors.
On the last day of SPIE’s 2016 DCS exhibition in Baltimore, Kevin Fogarty with Canon showed us a 19 micron pixel pitch sensor that can achieve a full color and high definition image in extremely low light environments.
This year at SPIE’s DCS exhibition, Donna with DSI gave us a quick on-location hello from the show floor before turning it over to principle investigator Kevin Gibbons so that he could offer some advice on what you should consider before determining an optical coating’s specifications for sensing applications.
Marco Snikkers wrapped up our Photonics West 2016 coverage by introducing us to a pixel sensor that acts as an 8-channel spectrometer for biomedical, fluorescence marking, and colorimeter applications, as well as a multi-spectral camera that can monitor specific wavelengths in real-time.
First Sensor’s Paul Sharman took time out of a busy day one of the exhibition to catch us up on some recent product releases.
Sensors Unlimited — UTC Aerospace Systems cut the ribbon on their new facility on September 17th, 2014. Doug Malchow spent a few minutes with us explaining how the move to a bigger and better place has already resulted in better quality imaging detectors with lower defects, lower bad pixel counts, and much lower dark current.
Jeff Eng, applications engineer with Hamamatsu, shows us a MEMS FTIR engine for IR spectroscopy instruments that works in applications involving gas sensing, materials analysis, and point of care devices. He also introduces us to 2D InGaAs image sensors for thermal imaging monitors, NIR image detection, and foreign object detection; compact radiation detectors; and more.
Excelitas and Qioptiq have joined together to provide custom optics manufacturing and a wide array of sensor offerings for various applications.
LIGHT SENSORS & DETECTORS
A light sensor is a device senses or detects light. Various available kinds of light sensors and detectors function in different ways to give required results.
Active pixel sensors which are image sensors comprises of an integrated circuit with a number of pixel sensors. Each individual pixel has a light sensor as well as an active amplifier.
Charge-coupled devices (CCD)
These are applied in recording of images in astronomy, digital cinematography and digital photography.
A silver halide molecule is split into an atom of metallic silver and a halogen atom; the photographic developer causes adjacent molecules to split similarly. An example is a photographic plate.
They are sensitive enough to measure and determine the energy of single x-ray, visible and infrared photons.
They are normally quantum devices where individual photons produces a discrete effect when exposed to light. This makes Optical detectors to behave like thermometers by responding solely to the heating effect of the incoming radiation.
Photo resistors or Light Dependent Resistors (LDR)
They change resistance according to light intensity. The light then can be measured or determined by measuring the resistance.
Photovoltaic cells or solar cells
When Illuminated they produce a voltage and supply an electric current. Which means the level of illumination is directly dependent on the amount of light being supplied.
They contain a photocathode that emits electrons when illuminated. A chain of diodes then can be used to amplify the electrons.
These contain a photo cathode which when illuminated emit electrons making the tube to conduct an electric current that is proportional to the light intensity.
Has two photodiode arrays which convert light into current; one photodiode array responds to ambient light and the other responds only to infrared light; when joined with an infrared LED, this second LED array can operate as a proximity sensor.
Ambient Light Sensing Application
Ambient light sensors are incorporated in various laptops as well as cell phones to detect the lighting in the surrounding environment and appropriately adjust the backlight of the screen.