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NV & Thermal Imaging how does it works

How does Thermal Imaging work?

Thermal Imaging amplifies infrared heat radiating off objects and assigns the varying range of heat different shades of color through its onboard processor. This allows you to easily compare / contrast varying objects, animals and other heat signatures. Due to the variances in heat, you can have shades varying in color, as well as shades in a greyscale hue. The main aspects to focus on with Thermal is the Resolution and the Hertz of the unit. Resolution deals with how many pixels are shown in each area within the picture. Since Thermal uses internalized processors and cores, it is very comparable to other electronics that offer you high resolution images. The higher the Resolution on a Thermal device the better the clarity and quality of the picture. Hertz refers to how quickly an image/picture refreshes per second. The higher the number of Hertz the smoother an image appears as you scan a horizon or field.

Thermal has a very practical element to using in the field, particularly, there is no hiding from thermal. You can track where animals have been and see through brush to where they are hiding. Locating blood paths, or even downed animals with thermal is exceedingly easy, given that the animals heat signatures can be visible for up to several hours through a thermal device. Thermal offers significant advantages in the Law Enforcement and Protection markets as well. Particularly in viewing hidden objects or persons, but also in determining amount of heat that is radiating from tires, engines or even people. Several Thermal options come with on-board recording, allowing you to take image and video, as well as GPS and WiFi enabled. Thermals can come in a monocular, goggle or weapons mountable device.

How does Night Vision work?

Night Vision amplifies ambient light that may not be visible to the naked eye, and allows you to see in darkness. Night vision is broken down into multiple generations, each offering a higher level of performance (ranging from Gen1 – Gen3, as well as Digital Night Vision). Night Vision technology uses various types of image intensifier tubes that convert weak light from the visible and near-infrared spectrum to visible light detectable by a human eye. Allowing people to see in semi dark or full darkness with the help of IR illumination or ambient light. Night Vision amplifies this ambient light by passing through electron charged intensifier tubes. All night vision devices are very sensitive to light, and are possible to damage by exposing to sunlight, headlights from cars, or from too much direct light

Night Vision Generations

The key difference between the night vision generations is the intensifier technology. Gen1 was first developed in the Vietnam area, and is recognized as the now entry level into night vision devices. Gen1 devices use an intensifier tube that amplifies ambient light by accelerating electrons and striking a green phosphorus surface (just like a television). Gen1 used under optimal conditions give you 75-100 yds visibility. Gen2 devices have added a micro-channel plate that multiplies the number of electrons before they make contact on the phosphorus screen (thus increasing clarity, quality and brightness). Gen2 devices can come in white or green phosphorus variants. The white phosphorus typically run more, as they provide enhanced clarity, as well as lower eye fatigue. Gen2 devices under optical conditions can expect visibility in 150-200 yds. Gen3 is currently what the US Military uses and have added a Gallium Arsenide photocathode which creates significantly more photoelectrons than Gen2 devices and is more efficient at amplifying existing light or IR illumination. Gen3 devices are significantly brighter and better in optical clarity than other generations and under optimal conditions allow visibility out to 350-400 yds. Lastly, Digital Night Vision was released in the early 2000’s, as it plays on same principal as your NV modes on digital cameras. Digital NV uses CCD (charged coupling devices) to process light prior to sending to an LCD (liquid crystal display) image. Utilizing this technology, Digital NV is not damaged by large amount of natural light and are able to be used in both night and day. As with most technology Digital NV has offered a significant bang for your buck, as it is typically cost comparative to Gen1 devices, but offers resolution and clarity of a Gen2 device.

Levels of Night Vision IIT

Levels of Gen 2+ Night Vision IIT

AGM Global Vision offers Gen 2+ image intensifier tubes (IIT) in 3 levels: L1, L2, and L3. All Gen 2+ night vision tubes are equipped with microchannel plate, multi-alkaline photocathode, and are available in P43 (Green Phosphor) and P45 (White Phosphor) configurations. Resolution ranging from 47 to 72 lp/mm.  The main difference between the levels is cosmetics.

 

Level 1 (L1)

 Maximum Spots Allowed in Each Zone**

Zone

Spot Size (in)

1

2

3

>.015 or larger

0

0

0

>.012 – .015

0

0

0

>.009 – .012

0

0

0

>.006 – .009

0

1

2

.003 – .006

1

2

3

NOTE:  Not more than 2 spots allowed

 

Level 2 (L2)

 Maximum Spots Allowed in Each Zone**

Zone

Spot Size (in)

1

2

3

>.015 or larger

0

0

0

>.012 – .015

0

0

0

>.009 – .012

0

0

1

>.006 – .009

0

1

2

.003 – .006

1

2

3

NOTE:  Not more than 4 spots allowed

 

 

Level 3 (L3)

Maximum Spots Allowed in Each Zone**

Zone

Spot Size (in)

1

2

3

>.015 or larger

0

0

0

>.012 – .015

0

0

0

>.009 – .012

0

1

1

>.006 – .009

0

1

2

.003 – .006

1

2

3

NOTE:  Not more than 6 spots allowed

 

Levels of Gen 3 Night Vision IIT

AGM Global Vision offers Gen 3 image intensifier tubes (IIT) in 3 levels: L1, L2, and L3. All Gen 3 night vision tubes are equipped with microchannel plate, use photocathode made with gallium arsenide, and are available in P43 (Green Phosphor) and P45 (White Phosphor) configurations. Resolution ranging from 64 to 72 lp/mm. The main difference between the levels is cosmetics.

 

Level 1 (L1)

 Maximum Spots Allowed in Each Zone**

Zone

Spot Size (in)

1

2

3

>.015 or larger

0

0

0

>.012 – .015

0

0

0

>.009 – .012

0

0

0

>.006 – .009

0

1

2

.003 – .006

1

2

3

NOTE:  Not more than 2 spots allowed

 

Level 2 (L2)

 Maximum Spots Allowed in Each Zone**

Zone

Spot Size (in)

1

2

3

>.015 or larger

0

0

0

>.012 – .015

0

0

0

>.009 – .012

0

0

1

>.006 – .009

0

1

2

.003 – .006

1

2

3

NOTE:  Not more than 4 spots allowed

 

 

Level 3 (L3)

Maximum Spots Allowed in Each Zone**

Zone

Spot Size (in)

1

2

3

>.015 or larger

0

0

0

>.012 – .015

0

0

0

>.009 – .012

0

1

1

>.006 – .009

0

1

2

.003 – .006

1

2

3

NOTE:  Not more than 6 spots allowed