CORONA CAMERAS

20161212In power generation and distribution environments, detecting coronal discharge and arcing is critical to preventing flashover. Corona cameras enable optical detection of UV signals in full daylight, so inspectors can accurately pinpoint sources of corona, partial discharge, micro-arcing, and arcing. We specifically uses the DayCor® Superb Corona Detection System, which offers:

  • The most sensitive bi-spectral visible-UV detection apparatus
  • Absolute solar blindness performance
  • High pinpointing resolution
  • The corona cameras used, rented, and sold are explosion-proof, to ensure the utmost of safety in harsh conditions.

This article comes from atlas-inspection edit released

How Night Vision Works

Here’s how night vision works:

  1. A special lens focuses the infrared light emitted by all of the objects in view.
  2. The focused light is scanned by a phased array of infrared-detector elements. The detector elements create a very detailed temperature pattern called a thermogram. It only takes about one-thirtieth of a second for the detector array to obtain the temperature information to make the thermogram. This information is obtained from several thousand points in the field of view of the detector array.
  3. The thermogram created by the detector elements is translated into electric impulses.
  4. The impulses are sent to a signal-processing unit, a circuit board with a dedicated chip that translates the information from the elements into data for the display.
  5. The signal-processing unit sends the information to the display, where it appears as various colors depending on the intensity of the infrared emission. The combination of all the impulses from all of the elements creates the image.

Most night vision devices scan at a rate of 30 times per second. They can sense temperatures ranging from -4 degrees Fahrenheit (-20 degrees Celsius) to 3,600 F (2,000 C), and can normally detect changes in temperature of about 0.4 F (0.2 C).

There are two common types of night vision devices:

  • Un-cooled – This is the most common type of night vision device. The infrared-detector elements are contained in a unit that operates at room temperature. This type of system is completely quiet, activates immediately and has the battery built right in.
  • Cryogenically cooled – More expensive and more susceptible to damage from rugged use, these systems have the elements sealed inside a container that cools them to below 32 F (zero C). The advantage of such a system is the incredible resolution and sensitivity that result from cooling the elements. Cryogenically-cooled systems can “see” a difference as small as 0.2 F (0.1 C) from more than 1,000 ft (300 m) away, which is enough to tell if a person is holding a gun at that distance!

While night vision is great for detecting people or working in near-absolute darkness, most night vision equipment uses image-enhancement technology.

This article comes from electronics edit released

Thermal Imaging Cameras Explained

Thermal imaging cameras are devices that translate thermal energy (heat) into visible light in order to analyze a particular object or scene. The image produced is known as a thermogram and is analyzed through a process called thermography. Thermal imaging cameras are sophisticated devices that process the captured image and display it on a screen. These images can be used for immediate diagnosis or processed through specialized software for further evaluation, accuracy and report output. Thermal imaging cameras take measuring temperature to the next level; instead of getting a number for the temperature you get a picture showing the temperature differences of a surface.

What Do Thermal Imaging Cameras See?

Visible light is what we see around us every day. It is the only part of the electromagnetic spectrum that we can see. Visible light only takes up a small area in the electromagnetic spectrum and infrared radiation (IR) represents a larger percentage. If we want to see what’s going on in other parts of the spectrum we need specialized equipment.

All objects absorb, reflect and sometimes transmit energy at different levels. Different materials will give off heat or cold energy at different rates. It’s this energy that can be detected by infrared equipment and displayed as images.

Thermal Imaging Camera Applications and Uses

Originally developed for military use during the Korean War, thermal imaging cameras have migrated into other fields and have found many uses. Firefighters use them to see through smoke, find people and localize hotspots of fires. Law enforcement uses the technology to manage surveillance activities, locate and apprehend suspects, investigate crime scenes and conduct search and rescue operations. Power line maintenance technicians locate overheating joints and parts to eliminate potential failures. Where thermal insulation becomes faulty, building construction technicians can see heat leaks to improve the efficiencies of cooling or heating. Physiological activities, such as fever, in human beings and other warm-blooded animals can also be monitored with thermographic imaging. They are also common tools used by home inspectors.

Thermal Imaging Camera Features

Thermal imaging cameras can be purchased with the bare minimum of features that only read the temperature of the fixed center crosshairs on the display or with multiple features that allow the user to select multiple moveable crosshairs and draw comparisons between them to show the high, low and average temperatures on the display. Thermal imaging cameras have user-selectable multiple color palettes, such as black/white, iron or rainbow. The iron palette is most commonly used by home inspectors. The black/white palette helps identify details on an image, and the rainbow palette has the best thermal sensitivity for displaying the differences in temperature.

This article comes from grainger edit released

What is thermal imaging?

Thermal imaging is a method of improving visibility of objects in a dark environment by detecting the objects’ infrared radiation and creating an image based on that information.

20160202Thermal imaging, near-infrared illumination, low-light imaging and are the three most commonly used night vision technologies. Unlike the other two methods, thermal imaging works in environments without any ambient light. Like near-infrared illumination, thermal imaging can penetrate obscurants such as smoke, fog and haze.

Here’s a brief explanation of how thermal imaging works: All objects emit infrared energy (heat) as a function of their temperature. The infrared energy emitted by an object is known as its heat signature. In general, the hotter an object is, the more radiation it emits. A thermal imager (also known as a thermal camera) is essentially a heat sensor that is capable of detecting tiny differences in temperature. The device collects the infrared radiation from objects in the scene and creates an electronic image based on information about the temperature differences. Because objects are rarely precisely the same temperature as other objects around them, a thermal camera can detect them and they will appear as distinct in a thermal image.

Thermal images are normally grayscale in nature: black objects are cold, white objects are hot and the depth of gray indicates variations between the two. Some thermal cameras, however, add color to images to help users identify objects at different temperatures.

This article comes from whatis edit released

 

What Are Some Uses For Infrared Camera Lens Filters?(Part One)

Infrared might be the kind of term that implies to many people high technology that is only applicable in the world of special military operations. In actuality, it is a form of photography that can be very artistically pleasing. Moreover, it has a range of practical uses across a variety of professional platforms. Infrared is really quite accessible technology and, in fact, all that is required to use the technology is a lens filter for a photographic or video camera.

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Why Shoot Infrared Photos and Videos?

Shooting photos and videos in infrared has numerous artistic and practical applications. For those interested in the former, the infrared spectrum brings out details in a scene that would remain hidden if the scene was shot in normal color. Infrared photos have incredible clarity and extraordinarily sharp contrast. Filtering out ordinary colors and leaving a monochrome also adds an element of surreality to scenes, as if they taking place on another planet.

The ability of the infrared spectrum to bring otherwise subtle details into sharp focus has given infrared photography and videography real-world applicability as well. Many branches of science use infrared photography. Botanists are better able to observe cellular material in plants, and astronomers can capture clearer space images, for example. Infrared photography also helps doctors see vascular systems beneath the skin. Militaries have been using infrared photography and videography for decades to increase the efficacy of their operations.

Whether practicing an art form or attempting to capture details to better perform a professional task, infrared photography and videography helps the human eye see things that it otherwise cannot and greatly assists in the achievement of both artistic and practical goals.

How Do Infrared Camera Lens Filters Work?

On the spectrum of light, the human eye can only see between wavelengths of 400 and 700 nanometers. These wavelengths determine the colors that people can perceive. Infrared light is past 700 nanometers on the spectrum, which is generally imperceptible to the human eye.

Camera lenses are designed to let light at wavelengths of between 400 and 700 nanometers pass through in order to capture colors the way the average human eye sees them. An infrared lens filter employs opaque glass to absorb all of this visible light, allowing only light at the infrared end of the spectrum to pass through the lens and hit the film or image sensor, depending on whether the camera is film or digital.

Most digital SLR cameras are actually designed to block infrared light, but those photographers interested in shooting infrared photography with digital SLR cameras can still do so with an infrared filter. Colors may appear strange and a tripod will likely have to be employed because the shutter needs to be held open for a long time due most light reaching the sensor being blocked. Converting the photos to black and white will likely achieve the monochrome effect desired in infrared photography.

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Thermal Imaging Systems for Public Transportation Safety

20160114Thermal Imaging in the Transportation Sector

While the transportation sector continues to grow in revenue, size and scope, so too does the risk associated with maintaining public safety. The transportation industry must seek out more comprehensive solutions to bridge the gap between the capabilities of conventional video surveillance and the vulnerabilities created by a lack of ambient light, challenging environments such as fog or haze, long range detection limitations and glare from external light sources.

  • Mass Transit and Passenger Rail As the general public becomes more reliant on mass transit as a means of transportation to and from work, rain or shine, from dusk until dawn, existing security infrastructures must be improved to provide the necessary level of safety to mass transit and passenger rail patrons.
  • Aviation Maintaining active surveillance, alerting security personnel to potential threats and long-range detection capabilities remain prevalent challenges for perimeter security at airport facilities.
  • Commercial Distribution The past several years have seen an increasing rate of theft in freight delivery and shipping operations. Organized crime efforts are more frequently targeting consumer goods that can be easily sold on the black market.

Improving Operational Efficiency and Safety

The evolution of thermal imaging continues to enable Security Systems Integrators with more efficient surveillance, more comprehensive coverage and lower false alarm rates. In the transportation sector, safeguarding pedestrians and maintaining surveillance of valuable cargo can be more wholly achieved through the implementation of IP networked thermal camera systems.

This article comes from drsinfrared edit released

Thermal rifle scopes

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Thermal rifle scopes and weapon sights are by far the coolest optical devices you can install on a weapon. Not only do they offer the flexibility of daytime and night time use, but they also deliver in weather conditions when other optical devices simply fail. Fog is one such example. Like all other thermal imaging devices, thermal rifle scopes read off thermal signatures of all objects and present the user with an image showing a gradient map of the heat signatures. Most modern thermal rifle scopes feature several color palates as well as the all time standard black and white. Another fantastic feature of thermal rifle scopes is their ability to output video signal. by means of a special portable digital recorder you can now easily record your hunts to show friends and family.

When picking a thermal rifle scope, it is important to understand what you should be looking for. Key components of high importance are objective lens diameter, resolution and refresh rate of the thermal core, magnification capabilities, reticle patterns and battery life. Most popular scopes are typically 3x 42mm lens thermal scopes with 60hz core. Such a device will handle really well for hunting in the range of 200-250 yards.

Another important point to note is the difference between night vision rifle scopes and thermal riflescope. Night vision optics in general present you with the real picture of what is in front of you by simply making those items more visible than they are to a naked eye. Thermal devices work differently. Due to the fact that thermal scopes read and reproduce on display thermal signature of an object, you cannot expect to see all details of the object you are looking at. You will only see an outline of items which have contrasting temperatures. This makes thermal less practical when dealing with target shooting and when identifying specific features of an animal very important.

Probably the most common use for thermal riflescope is for hunting pigs. At Night Vision Guys we try to stock as many popular thermal rifle scope models as possible to avoid long assembly wait and to bring the scopes to you as quickly as we can.

This article comes from nightvisionguys edit released

 

Thermography drone for aerial recordings

Thermography has become an important topic in the industrial and construction sectors in the past few decades. A new development in this area consists of thermographic inspection from the air. Combined with drones, thermal imaging cameras can be particularly useful for inspecting photovoltaic systems. Thermal imaging camera drones are also being used for the thermographic inspection of inaccessible buildings or electric power lines as well as for firefighting and law enforcement jobs. The technology could also be implemented for other industrial applications, research and development, cutting edge aerial archaeology or nature and animal observance.

Prior to the use of drones, overviews of larger photovoltaic systems could only be thermographically examined from higher locations and buildings using skyworkers or elevated photography tripods, which required extensive effort and was quite inflexible. Clients are dissatisfied with this and therefore developed the idea of a thermal imaging camera drone to inspect photovoltaic systems and larger buildings.

Measurement and testing solutions

With its three divisions datacom (measurement, logging, analyzing, optimizing, testing and managing networks and applications), industrial (measurement technology for EMC, HF, thermography, output, signal analysis, data recording and laboratories) and fiberoptics (fibre optic measurement and splice technology, optical components, CATV), we provide commercial Total Testing Solutions from a single source.

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HD video downlink

The drone uses an HD video downlink to send the live thermal image to one or more monitors (e.g. to a monitor for the thermographer and simultaneously to a tablet PC for the person controlling the drone). To achieve this, the overall solution uses the camera’s HDMI port and its own HD downlink solution to transmit continuous nonradiometric thermal video of the entire flight in HD quality and can include the MSX image if required. The overall solution also uses a self-developed solution to control the camera, which includes taking a radiometric thermal image while simultaneously performing visual recording.

This article comes from flir edit released