Line Sensor – InGaAs linear detector
Line Sensor, or InGaAs linear sensors, are actually detectors for SWIR spectroscopy applications. While Silicon-based sensors, such as CMOS, PDA and CCD are not sensitive from 900nm to 2.5µm, InGaAs linear detector can do the job. InGaAs sensors: These are like special cameras that see infrared light, which is light we can’t see with our eyes. Uncooled and TE-cooled packages: They come in two versions: one that works at normal temperatures, and one that’s kept cold to work better. High sensitivity: They can see very faint infrared light. Low readout noise: They produce clear images with less “static” or interference. High frame rates: They can take many pictures very quickly, like a fast movie. Good linear response: They accurately measure the amount of infrared light.
NIR absorbance/reflectance applications:
This means they are used to see how materials absorb or reflect infrared light. Conveyor belt plastic sorting and recycling: They can help sort different types of plastic on a moving belt. Moisture content measurement: They can tell how much water is in food and animal feed. Hyperspectral and medical imaging: They can create detailed pictures for scientific research and medical diagnoses.
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Here are only few examples:
NIR-256×1 InGaAs linear detector
Specifications
Optical and electrical performance
| Terms | TYP | |
| Response spectrum (μm)*1 | 0.95 ±0.05~1.7 ±0.05 | |
| Pixel filling rate(%) | 100 | |
| Quantum efficiency (%) | ≥65 | |
| Peak detection rate (cm·√Hz/W ) | ≥1 × 1012 | |
| Peak sensitivity (A/W) | ≥0.8 | |
| Effective pixel rate (%)*2 | 100 | |
| Response inconsistency (%) | <4 | |
| Playback mode | IWR 、ITR，Optional | |
| Readout rate(MHz) | ≥10 | |
| Maximum frame rate(fps) | >20k | |
| Gain gear | 8 | |
| Saturation voltage(V) | 1.6 | |
| Conversion gain (nV/e-) | Gain gear1：16000Gain gear2：8000Gain gear3：4000Gain gear4：2665 | Gain gear5：1775Gain gear6：840Gain gear7：325Gain gear8：160 |
Notice：
*1 Focal plane temperature=25℃
*2 The percentage of pixels whose response signal deviates from the mean value less than a certain range
NIR-512×1 InGaAs linear detector
Specifications
Optical and electrical performance
| Index | Typical | |
| Response spectrum range (μm)*1 | 0.95 ±0.05~1.7 ±0.05 | |
| Pixel filling rate (%) | 100 | |
| Quantum Efficiency (%) | ≥65 | |
| Peak detection rate (cm·√Hz/W ) | ≥1×1012 | |
| Peak sensitivity (A/W) | ≥0.8 | |
| Effective pixel rate (%)*2 | 100 | |
| Response inconsistency (%) | <4 | |
| Readout mode | IWR、ITR，optional | |
| Readout rate (MHz) | ≥10 | |
| Maximum frame rate (fps) | >20k | |
| Gain gear | 8 | |
| Saturation voltage (V) | 1.6 | |
| Conversion gain (nV/e-) | Gain gear1：16000Gain gear2：8000Gain gear3：4000Gain gear4：2665 | Gain gear5：1775Gain gear6：840Gain gear7：325Gain gear8：160 |
Notice：
*1 Focal plane temperature=25℃
*2 The deviation between the pixel response signal and the average value is less than a certain range’s the percentage of pixels.
NIR-512×2 InGaAs linear detector
Specifications
Optical and electrical performance
| Index Name | Typ | |
| Responsespectrum (μm)*1 | 1.00 ±0.05~1.85 ±0.05 | |
| Pixel filling rate(%) | 100 | |
| Peak quantum efficiency (%) | ≥75 | |
| Peak detection rate(cm●Hz/ W) | ≥1×1012 | |
| Peak sensitivity (A/W) | ≥0.8 | |
| Effective pixel rate (%)*2 | A line≥99，Other line≥99.5 | |
| Response inconsistency (%) | <5 | |
| playback mode | IWR 、ITR，optional | |
| Readout rate (MHz) | unipath≥10 | |
| Maximum frame rate (fps) | >20k | |
| Gain gear | 8 | |
| Saturation voltage (V) | 1.6 | |
| Conversion gain (nV/e-) | Gain gear 1：16000Gain gear 2：8000Gain gear 3：4000Gain gear 4：2665 | Gain gear 5：1775Gain gear 6：840Gain gear 7：325Gain gear 8：160 |
Notice：
*1 Focal plane temperature=25℃
*2 The deviation between the pixel response signal and the average value is less than a certain range’s the percentage of pixels.
Tags:
InGaAs line scan detector., InGaAs line sensor, InGaAs linear detector, Linear InGaAs array, NIR line scan camera, Short-wave infrared line sensor, SWIR line scan, גלאי קווי InGaAs, חיישן קו InGaAs, מערך קווי InGaAs, מצלמת סריקה קווית NIR
SWIR-2048×1 InGaAs Linear Detector
Specifications
Optical and electrical performance
| Index name | Typical Value | |
| Response spectrum range(μm)*1 | 0.95 ±0.05~1.7 ±0.05 | |
| Pixel filling rate(%) | 100 | |
| Peak quantum efficiency(%) | ≥65 | |
| Peak detection rate (cm∙Hz/w) | ≥1×1012 | |
| Peak sensitivity(A/W) | ≥0.8 | |
| Effective pixel rate(%)*2 | ≥99 | |
| Response non-uniformity(%) | <3 | |
| Readout method | IWR 、ITR | |
| Readout rate(MHz) | 1~11 | |
| Maximum frame rate(fps) | 40k | |
| Gain gear | 4 | |
| Saturation voltage(V) | 2.0 | |
| Integrating capacitance(fF) | Gain gear1: 10Gain gear3: 100 | Gain gear2:20Gain gear4:500 |
Notice：
* 1 Focal plane temperature = 25℃
*2 Near the half-well, the deviation of the pixel response signal from the average value is less than the percentage of pixels within a certain range
Here are 10 products similar to a linear InGaAs detector that are in top demand today:
- High-Speed CMOS Line Scan Sensors: These sensors use a CMOS (Complementary Metal-Oxide-Semiconductor) architecture and are a dominant technology for industrial inspection in the visible and near-infrared (NIR) spectrum. Their high speed, low power consumption, and high resolution make them ideal for inspecting fast-moving objects on a conveyor belt.
- Multispectral and Hyperspectral Line Scan Cameras: These integrated systems go beyond standard visible or SWIR imaging. They use multiple line sensors (e.g., InGaAs, CMOS) and a prism or grating to capture an object’s image at multiple, specific wavelengths simultaneously. They are in high demand for applications that require detailed spectral analysis, such as sorting plastics for recycling or analyzing food quality.
- Time Delay and Integration (TDI) CMOS Line Scan Sensors: TDI is a technique that uses multiple lines of pixels to accumulate light as an object moves past. This dramatically increases a sensor’s sensitivity without sacrificing speed, making TDI-CMOS sensors a top choice for low-light or high-speed applications in the visible and NIR range.
- InGaAs Two-Dimensional (2D) Arrays (FPA): While a linear detector captures a single line, a 2D InGaAs focal plane array (FPA) captures a full SWIR image in a single shot. These are in top demand for high-end applications like military night vision, airborne surveillance, and SWIR microscopy, where a complete image is required without relying on motion.
- X-ray Line Detectors: These detectors are used in inspection systems to see inside products and packaging. A linear array of detectors captures a line-by-line X-ray image of an object as it passes through. They are in high demand for food safety and security screening to detect contaminants like metal, glass, and stones.
- Uncooled Microbolometer Linear Arrays: Microbolometers are a type of thermal detector that does not require cryogenic cooling. While most are 2D arrays, linear arrays are used in applications like process monitoring or thermal line scanning where a specific line of temperature data is needed, offering a low-cost solution for the LWIR (long-wave infrared) spectrum.
- Silicon (Si) Photodiode Arrays: Silicon is a highly sensitive material for detecting light in the UV, visible, and NIR ranges (up to ~1100 nm). Linear silicon arrays are the most common type of line sensor and are the backbone of many spectrophotometers, position sensors, and quality control systems.
- Fiber-Coupled Spectrometers: An integrated system that uses a linear detector (e.g., InGaAs, Silicon CCD) to analyze the spectrum of light. These systems are in high demand in the pharmaceutical, chemical, and food industries for real-time quality control and process analysis.
- Extended-Range InGaAs (e-InGaAs) Linear Detectors: A specialized version of InGaAs that extends the detection range to around 2.6 µm, allowing for a broader spectral analysis. They are in demand for high-end research and scientific applications where a wider SWIR window is needed.
- Custom-Designed Linear Arrays: Many OEMs and research groups require linear arrays with specific characteristics, such as a custom number of pixels, different pixel sizes, or unique packaging. The demand for these custom-designed sensors is high in specialized, high-volume applications where off-the-shelf products are not sufficient.
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