The laser flash is not a hindrance to the sensor. Free Technical Library News

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Laser flash is not a hindrance to the sensor

20.06.2000

Florida State University has invented a device that can protect the photosensitive elements of various sensors from high-power laser radiation.

The device is an "electronic shutter" capable of making a transparent screen opaque at a very high speed, so that the impact of a powerful laser flash does not have time to damage the sensors. The screen consists of thousands of miniature slits (up to 50 microns in size) that can close and open up to 10 times per second.

The novelty has a wide range of applications - from military to household video cameras and sunglasses.

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APD-CMOS image sensor shoots at 0,01 lux illumination 15.02.2016

Panasonic has developed a CMOS image sensor with an avalanche photodiode in each photosensitive element (APD-CMOS). Through multiplication in an avalanche photodiode, it produces an electrical signal 10 times greater than that obtained with conventional photovoltaic conversion. This makes it possible to obtain clear color images, even at night (illuminance of 000 lux) or in other similar conditions.

Using a new sensor allows you to reduce shutter speed. In addition, the multiplication can be controlled by varying the voltage applied to the avalanche photodiode, allowing the sensor characteristics to be adapted to the current lighting conditions. In other words, the sensor is suitable for both shooting in the dark and in the light. The manufacturer estimates the dynamic range of the sensor at 100 dB (a conventional CMOS type sensor, according to him, has a dynamic range of 40 dB).

The main applications for APD-CMOS image sensors are CCTV cameras and industrial cameras.

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