IR illuminator (for night vision)

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THE MYSTERY OF NIGHT VISION

• IR Illuminator

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Agenda

• Introduction
• Overview of light spectrum
• Day/Night Optical Camera
• Day/Night Optical Camera with IR illuminator
• Comparing IR optical camera and Thermal imaging
  camera

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Introduction

• Night Vision sounds confusing when it is
  compared with day/night optical camera with
  thermal image cameras.
• This presentation will help you identify the best
  camera as per your requirement and help you judge
  the resolution that a camera is supposed to have.

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Light spectrum(Range of light)

• Spectrum is measured in Wavelength or bandwidth.
• Wavelength is measured in Nanometers(nm).
• 1nm1 x 10-9meters

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• The above chart shows
• Shorter the wavelength higher the frequency.
• Visible portion 350 nm to 750 nm

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Two types of camera

• Optimal Camera
• Can see wide spectrum than our eye.
• Visible to eye 350 nm to
• 750 nm
• Optimal camera sensor
• can see750 nm to 950 nm.
• Total range they can see
• 350 nm to 950 nm

• Thermal Imaging cameras
• They can see at a lower range
• then a optimal camera. They
• can take a light from the
• object itself so they work at a
• range of 14000 nm

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Day/Night Optical camera

• As the name suggests they can be see during day
  as well as night.
• During night they switch to low light mode. This
  light is taken from the moon. They are IR
  sensitive at night.
• 1 lux is the night from the full moon. Cameras
  can see even in 0.05 lux of light.

• Measured in TV lines or pixels
• Analog cameras(TV lines resolution) 420 or 500
  lines
• IP camera(Pixel resolution) 6404 80 or 12801024

40 pixels/Ft to identify the number on a license
plate.
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Day/Night Optical Camera with IR illuminator

• IR illuminator with the optimal camera provides a
  high quality of image even at a low light.
• Beside is an IR illuminator.
• At night IR helps to detect things at 14000ft(4.5
  km)

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Comparison between IR optical cameras and
Thermal cameras

• Detection 10 pixels
• Recognition 30 pixels
• Identification 40 pixels
• Cost 300 onwards
• Used in Home Security and public security

• Detection4-5 pixels
• Recognition 6-9 pixels
• Identification 10-16 pixels
• Cost 25000 onwards
• Used in Defense security

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Thank youto know more on IR illuminator and
types of IR illuminator visit http//axtoncctv.co.
uk