What is InGaAs sensor?
What is InGaAs sensor?
InGaAs sensors are used for applications in physical and life science that require high sensitivity over the 900-1700 nm wavelength range, referred to as shortwave infrared (SWIR). Some InGaAs sensors are able to measure up to 2500 nm due to changes in material composition.
What is line scan sensor?
A line scan sensor captures an image of a moving object in one-pixel “slices” that are later put together into a 2D image. A line-scan sensor is a specialized technology that uses a row of sensors to capture a digital image in one-pixel “slices” taken in rapid succession.
What are line cameras?
A line scan camera reads the image data one line at a time. This means that it doesn’t observe the image as a whole, but rather reviews it precisely line by line. This seamless recording style allows for inspections of over-long objects or even endless webs of material.
Is InGaAs a semiconductor?
InGaAs is a room-temperature semiconductor with applications in electronics and photonics. The principal importance of GaInAs is its application as a high-speed, high sensitivity photodetector of choice for optical fiber telecommunications.
How does an InGaAs detector work?
InGaAs detector arrays are a combination of detector material, which detects the light and turns the photons into electron-hole pairs. The number of electron-hole pairs is measured using a Read Out Integrated Circuit (ROIC).
How does line scan camera work?
Unlike an area-scan camera that captures the entire object in one 4:3 frame, a line-scan camera uses a single row of light-sensitive pixels that image across the object, line-by-line, accompanied by high intensity lighting. A completed image is built by stitching together the lines, much like a fax machine.
What is a linear array camera?
A rotating line camera is a digital camera that uses a linear CCD array to assemble a digital image as the camera rotates. The CCD array may consist of three sensor lines, one for each RGB color channel. Line-scan technology is capable of capturing data extremely fast, and at very high image resolutions.
What is line rate camera?
The maximum rate at which exposure and readout can occur is called the “line rate” and is specified in kilohertz (kHz). To “freeze” the motion of fast moving objects, high line rates are needed. Teledyne DALSA line scan cameras have line rates of up to 200 kHz, or 5 microseconds per line of pixels imaged.
Why is InGaAs so expensive?
Most infrared fabs don’t run that many InGaAs wafers in a year, let alone a month, limiting their statistical process control and ability to have high yield which is one of the many reasons InGaAs detector arrays are so expensive.
What is InGaAs?
What is InGaAs? InGaAs, or indium gallium arsenide, is an alloy of gallium arsenide and indium arsenide. In a more general sense, it belongs to the InGaAsP quaternary system that consists of alloys of indium arsenide (InAs), gallium arsenide (GaAs), indium phosphide (InP), and gallium phosphide (GaP).
What is the wavelength cut off of InGaAs?
Standard InGaAs has a long wavelength cutoff of 1.68 µm. Meaning, it is sensitive to the wavelengths of light that suffer the least signal dispersion and transmit furthest down a glass fiber (1.3 µm and 1.55 µm), therefore detecting “eye-safe” lasers (wavelengths longer than 1.4 µm).
What is InGaAsP alloy?
InGaAs, or indium gallium arsenide, is an alloy of gallium arsenide and indium arsenide. In a more general sense, it belongs to the InGaAsP quaternary system that consists of alloys of indium arsenide (InAs), gallium arsenide (GaAs), indium phosphide (InP), and gallium phosphide (GaP).
What is the lattice constant of InGaAsP?
For our four friends, the lattice constants range from 5.4505 Å (GaP) to 6.0585 Å (InAs) with GaAs at 5.6534 Å and InP at 5.8688 Å. The relationship between the lattice constant and the long wavelength cutoff of the 4 ternary alloys in the InGaAsP family are shown in Figure 1 Let’s get back to InGaAs..