With liftoff on the horizon, ESA’s Aeolus satellite is going through its last round of tests to make sure that this complex mission will work in orbit.
Opto Diode Corporation, an ITW company, presents the BXT2-17TF, a single-channel, infrared (IR) detector with an integrated 4.67 µm optical bandpass silicon filter. The high-performance lead selenide (PbSe) cooled device provides excellent sensitivity for industrial carbon monoxide (CO) detection in harsh environments.
Shortly after the announcement of the Nobel Prize in Physics 2017 for the US researchers Rainer Weiss, Barry Barish and Kip Thorne for the first direct detection of gravitational waves, scientists report the next breakthrough in the young field: The observatories LIGO in the USA and VIRGO in Italy have registered gravitational waves of a merging pair of neutron stars for the first time.
GLOBALFOUNDRIES today unveiled AutoPro™, a new platform designed to provide automotive customers a broad set of technology solutions and manufacturing services that minimize certification efforts and speed time-to-market.
The Royal Swedish Academy of Sciences has decided to award the Nobel Prize in Physics 2017.
Fiber Optic Center, Inc., (FOC), an international leading distributor specializing in helping their customers make the best cable assemblies in the world, introduces High Refractive Index Coating for Optoelectronics, LEDs, Emissive displays, AL-2264. By Kathleen Skelton
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.