Photonics Dictionary

CID camera

CID, or charge injection device, camera refers to a type of imaging device that utilizes a specific kind of solid-state image sensor technology. CID cameras are capable of capturing images in a manner similar to charge-coupled device (CCD) cameras but differ in certain aspects of their operation and performance.

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The charge injection device operates on the principle of transferring photo-generated charge packets through the device, analogous to CCD sensors. However, CID sensors are distinct in that they can accept charge from a variety of sources, including photo-generated electrons and externally injected electrons.

Key characteristics of CID cameras include:

Charge transfer: Like CCD sensors, CID sensors transfer charge packets across the device's surface using a series of electrodes and clocking signals. This enables the accumulation and readout of image data.

Injection of charge: Unlike CCDs, which generate charge solely from incident photons, CID sensors can also accept externally injected charge packets. This allows for greater flexibility in sensor operation and enables specialized imaging modes.

Signal processing: CID cameras typically feature integrated signal processing circuitry for image capture and control. This may include amplification, digitization, and other processing steps performed directly on the sensor chip.

CID cameras find application in various fields, including scientific imaging, industrial inspection, surveillance, and aerospace. They offer advantages such as high sensitivity, low noise, and the ability to operate in diverse imaging environments.

However, CID technology is less common than CCD or CMOS (complementary metal-oxide-semiconductor) sensor technology due to factors such as complexity and cost. In recent years, CMOS sensors have gained popularity due to their improved performance and lower manufacturing costs compared to CID and CCD sensors.
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