Tuesday, April 28, 2020

Princeton Instruments Super Deep Depletion CCD Achieves 75% QE at 1000nm

It came to my attention that Teledyne Princeton Instruments Blaze CCD-based cameras achieve 75% QE at 1000nm wavelength and are quite sensitive even at 1050nm. This CCD is a fairly new product manufactured since 2017:

"Proprietary BLAZE HR-Sensors are “super-deep-depletion” CCDs manufactured from high-resistivity bulk silicon in order to yield the highest near-infrared quantum efficiency of any silicon device. The silicon depletion region of each HR-Sensor is almost 4x thicker than that of a conventional deep-depletion (NIR-sensitive) CCD, affording quantum efficiency up to 7x greater at 1 µm than the best other deep-depletion sensors.

Spatial resolution for HR-Sensors is optimized by applying a bias voltage, resulting in a “fully depleted” silicon region with no diffusion of charge. The bias voltage generates an electric field that pushes the charge toward the correct pixels and does not allow charge to migrate to adjacent pixels.

The new sensors are offered in either 1340x100 or 1340x400 array formats with 20 µm pixels.

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