Definition of detector array

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Photonics Dictionary

detector array: A detector array refers to a collection of individual detector elements arranged in a two-dimensional grid or matrix format. Each element within the array is capable of detecting electromagnetic radiation or particles, converting them into electrical signals that can be processed and analyzed. Detector arrays are widely used in various fields, including imaging systems, spectroscopy, remote sensing, medical diagnostics, and scientific research.

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Key features of detector arrays include:

Spatial resolution: The spatial resolution of a detector array is determined by the number and density of individual detector elements within the array. Higher-resolution arrays can capture finer details in the observed scene or specimen.

Spectral sensitivity: Detector arrays can be designed to detect specific wavelengths or ranges of electromagnetic radiation, depending on the application. Different materials or sensor technologies may be employed to achieve sensitivity to ultraviolet, visible, infrared, or other portions of the electromagnetic spectrum.

Array size and format: Detector arrays come in various sizes and formats, ranging from small arrays with just a few elements to large-scale arrays with millions of pixels. Common formats include linear arrays, where detectors are arranged in a single row, and two-dimensional arrays, where detectors form a grid.

Response time: The response time of a detector array refers to the time it takes for individual elements to detect and convert incoming radiation into electrical signals. Faster response times are crucial for applications requiring real-time imaging or high-speed data acquisition.

Signal-to-noise ratio (SNR): The SNR of a detector array determines its ability to distinguish between signal and noise. Higher SNR values result in clearer and more accurate measurements.

Detector arrays can utilize various sensor technologies, including charge-coupled devices (CCDs), complementary metal-oxide-semiconductor (CMOS) sensors, photodiodes, photomultiplier tubes (PMTs), and others. Each technology has its own advantages and limitations in terms of sensitivity, dynamic range, speed, and noise performance.

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