The Mystery of Night Vision

night vision

night vision

The term night vision refers to the ability to see when there is not enough light. Usually, night vision is made possible by a combination of sufficient intensity range and sufficient spectral range. Sufficient intensity range refers to the ability of seeing objects in low light condition. It has been observed that humans have poor night vision as compared to most animals. This is largely because of the differences in the anatomy and morphology of their eyes. On the other hand, the spectral range techniques can sense the radiation that is invisible to a human observer. Their vision is restricted to a certain range of electromagnetic spectrum that is called visible light. In order to ensure improved vision in low light conditions, companies like Axton Technologies offer a wide range of IR illuminators.

The light spectrum is measured in the inverse or in the wave length, whichever is frequent. The wave length of light is measured in nanometers and one nanometer is equal to 1 x 10-9 meters. The visible portion of this spectrum is between 380nm to 750nm range. The day/night optical cameras are manufactured in a way so that these can observe a wider spectrum than the human eyes. These optical cameras perform better with the assistance of IR illuminators. In case there is very low illumination from the street lights or the moon, an IR illuminator can be used as a spotlight to use these cameras.

There are different types of IR illumination devices including LED light, laser type and filtered incandescent lamps. These are high power lamps that are covered by an infrared filter. It lets the infrared radiation pass and blocks the visible light component. LED illuminators utilize a group of standard infrared emitting LEDs. The laser types are the most efficient among IR illuminators. These devices are based on an infrared laser diode which produces near infrared energy.

As IR illuminators have several advantages over other night vision technologies, they have merged as the most in demand among a wide range of industries and businesses. Apart from being cost-effective as compared to other options, IR illuminators also offer better quality as they can perform high-speed video capture; see through darkness, mist, fog, rain and snowfall etc; and eliminate the inconsistency of ambient light. As the market has a growing demand for these, Axton Technologies brings a range of IR illuminators along with LED light and other professional lighting solutions for security and surveillance.

 

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