Infrasight Camera Series

IS640, IS640-17, IS320-12

At the core of each system is an Optotherm Infrasight Camera, designed for applications requiring high sensitivity, resolution, and accuracy.  We developed this camera series based on uncooled microbolometer technology to provide high performance and reliability at an affordable price point. A solid aluminum chassis improves thermal uniformity within the camera detector, optics, and electronics and facilitates optimum calibration accuracy over the ambient temperature operating range.

Applications
  • Semiconductor device failure analysis

  • Circuit board failure analysis

  • Microscopic temperature measurement and analysis of materials

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Overview

Specifications

Setup

Operation

Troubleshoot

Maintenance

    Overview

Comprehensive Calibration

Each camera undergoes a rigorous calibration procedure over the span of several days to precisely correlate detector response to temperature measurement.  Each lens is calibrated while installed on the camera, resulting in unsurpassed accuracy and measurement uniformity across the entire field-of-view.

Precision Optics

We developed a full suite of infrared lenses, enabling both microscopic and macroscopic temperature measurement.  Lenses are manufactured from Germanium, Zinc Selenide, and Zinc Sulfide with anti-reflective coatings for maximum transmission in the long wave infrared region.  Each lens is designed for maximum sensitivity, long working distance, and with minimum distortion for clear, precise imaging.  We developed a bayonet-style mechanical interface enabling quick lens attachment and removal while maximizing thermal uniformity between the lens and camera body to maintain the high measurement accuracy.

Included Components

  • Infrasight radiometric infrared camera

Additional Items Required

  • [PN0177] Thermalyze Image Analysis Software

  • [PN0356] USB Cable, 5m, 3.0 or USB3 cable

    Specifications

Infrasight Cameras

Model IS640 IS640-17 IS320-12

Cameras

[PN0102]
[PN0103]
[PN0286]
[PN0407]

Compatible lenses [PN0120]
[PN0119]
[PN0117]
[PN0116]
[PN0118]
[PN0120]
[PN0119]
[PN0117]
[PN0116]
[PN0118]

Communication Power over Camera Link (PoCL) USB 3.0 USB 3.0

CE Declaration of Conformity

This is to certify that the Optotherm Infrasight Camera series has been designed and manufactured to meet the requirements, as applicable, of the EU-Directive: 2014/30/EU Electromagnetic Compatibility and the following harmonizing standards. The system consequently meets the requirements for the CE-mark.


EMC Specifications                                        

The Optotherm Infrasight Camera series has been subjected to, and been shown to comply with, the EMC (Electromagnetic Compatibility) tests listed below in accordance with the requirements of the following specifications:        

  • IEC 60601-1-2 (4th Edition 2014 07): Medical electrical equipment – Part 1-2: General requirements for basic safety and essential performance – Collateral Standard: Electromagnetic disturbances – Requirements and tests

  • EN 61000-6-1:2007: Electromagnetic compatibility (EMC) - Part 6-1: Generic standards - Immunity standard for residential, commercial, and light-industrial environments

  • EN 61000-6-3:2007/A1:2011: Electromagnetic compatibility (EMC) – Part 6-3: Generic standards – Emission standard for residential, commercial, and light-industrial environments

  • EN 61326-1:2013: Electrical equipment for measurement, control, and laboratory use - EMC requirements Part 1: General requirements           

EMC Tests Performed
  • EN 55011:2009 - Radiated Emissions - Class B 30MHz - 1GHz

  • EN 61000-4-2:2008 - Electrostatic Discharge Immunity - 2kV, 4kV, 8kV, 15kV (Air), 8kV (contact)

  • EN 61000-4-3:2010 - Radiated Electromagnetic Field Immunity - 80MHz to 2.7GHz @ 10V/m 80% AM @ 1kHz

  • EN 61000-4-3:2010 - Proximity Fields from RF Wireless - 80MHz to 2.7GHz @ 10V/m 80% AM @ 1kHz

  • EN 61000-4-4:2012 - Fast Transient/Burst Immunity - I/O Lines (1kV)

  • EN 61000-4-6:2013 - Conducted RF Immunity - 3Vrms (150kHz - 80MHz)

  • EN 61000-4-8:2009 - Magnetic Field Immunity - 30A/m @ 50Hz & 60 Hz

    Setup

Mounting Threads

There are two ¼-20 internal threads (1.5” apart) and two M6 internal threads (25 mm apart) on the bottom of the camera that can be used for mounting the camera.  When mounting the camera, make sure bolts are securely screwed into the camera’s internal threads to prevent the possibility of dropping or damaging the camera.

Camera Damage: The Infrasight camera is a delicate precision optical instrument and should be handled with care.


Camera Link Cable (if applicable)

  1. Insert the small connector end of the Camera Link cable to the mini Camera Link receptacle on the back of the camera (see Figure 1) and tighten the thumbscrews.

  2. Insert the large connector end of the Camera Link cable to the Camera Link board that is installed in the computer and tighten the thumbscrews.


Cable Support

  1. Connect the Cable Support to the back of the camera using the two (2) M4 screws provided (see Figure 2).

  2. Loosen the Cable Support M3 thumbscrews and remove the Cable Clamp from the Cable Support (see Figure 2).

  3. Install the Cable Clamp over the cable and tighten the thumbscrews (see Figure 3).

 

Figure 1: Camera link connection

Figure 2: Camera mounted cable support

Figure 3: Tighten cable clamp

Camera Environment

Ambient Environment

Infrasight cameras are intended to be operated indoors.  Rapid temperature changes can reduce the camera’s measurement accuracy.  After handling the camera and after exposing the camera to a different ambient environment, allow the camera temperature to stabilize for approximately 1 minute before performing tests that require high accuracy.  The larger the temperature change, the more time will be required for the camera to stabilize.

To prevent rapid temperature changes, avoid mounting the camera in direct sunlight, close to heat sources, in front of air vents, or next to open doors or windows.  To minimize the time required for stabilization, avoid transporting or storing the camera in extreme temperature environments.

Camera Orientation

The camera can be operated in any orientation; aimed up, down, sideways, or at any angle.  When the camera is mounted so that is it aimed upwards, care should be taken to prevent dust, debris, and water from settling on the lens.

Camera Movement

Camera movement can produce image blur.  Therefore, minimize camera movement to reduce image blur.  In applications requiring frequent camera movement, secure all cables near the camera mount to reduce stress on the cable connectors on the back of the camera.

Vibration

Avoid mounting the camera in areas of excessive vibration.  Vibration can loosen internal camera components, can reduce temperature measurement accuracy due to image blurring, and can interfere with the automatic calibration process.

Infrared Windows

When it is required that the camera view objects through a window, it is important to select the correct window material to maximize transparency in the long wave infrared spectrum in which the camera operates.  Germanium is one of the most common materials for working in the LWIR band.  Glass and most plastics are opaque in the long wave infrared spectrum and cannot be used as infrared windows.

    Operation

Image Capture

  1. Start Thermalyze by double-clicking the Thermalyze icon on the computer desktop.

  2. From the drop-down box on the top toolbar, select the lens that is currently installed on the camera.

  3. From the drop-down box on the top toolbar, select the lowest temperature measurement range.

  4. Press the Camera Communication Settings button   on the top toolbar within the Camera section to open the Camera Communication Settings window.

  5. In the Com Port drop-down box, select the serial com port to which the camera is connected.  To determine the correct com port, open Window Device Manager and expand the items under Ports (COM & LPT).  There should be an entry called Matrox Solios Camera Link Com Port 0 (Com#).  "#" indicates the serial com port that should be selected.

  6. In the Baud Rate drop-down box, select 115,200 bps.

  7. Click the Capture Image button  to begin capturing and displaying thermal images.

  8. Aim the camera at an object whose temperature is higher than the ambient surroundings (such as another person) and then press the Auto Scale button to the upper right of the image in the Color Palette frame.  The images may not be in focus yet, but you should be able to see movement as you pass your hand slowly in front of the camera.

Figure 1: Removing a Lens

    Troubleshoot

Focusing Difficulty

Symptoms

Difficulty focusing the camera lens.

Details

For there to be contrast in a thermal image, there must either be temperature or emissivity differences on the target.  If temperature and emissivity are both uniform, there will be very little contrast in the image and focusing will be difficult.  Other causes of focusing difficulty include image averaging blur, inappropriate color palette and palette max/min settings.

Solution 1: Disable image averaging by unchecking the Enable Image Averaging button    on the top toolbar.  If the problem continues, proceed to the next solution.

Solution 2: Select the Grayscale   or Temperature Palette   to improve image contrast.  If the problem continues, proceed to the next solution.

Solution 3: Adjust the Color Palette Max and Min values to improve the contrast of the image or click the Auto Scale button to automatically adjust these values for maximum contrast.  If the problem continues, proceed to the next solution.

Solution 4: Heat the target using the thermal stage or a with heat gun to create thermal gradients and increase emissivity contrast.

Inaccurate Temperature Measurements

Symptoms

Image temperature measurements appear to be too high or too low.

Details

Infrasight cameras undergo a separate calibration procedure with each lens installed and in each measurement range.  During this calibration procedure, the camera and lens are stabilized at several different temperatures to determine the detector response at various temperatures by viewing a range of blackbody set to different temperatures.  When operating the camera, it is essential that the camera and lens temperature be stable and uniform for optimum measurement accuracy.

Solution 1: After powering the camera or changing the lens, wait several minutes until the camera and lens stabilize at a uniform temperature before conducting measurements.  This is especially necessary when the camera has been stored in a hot or cold environment.  Therefore, avoid storing the camera in extreme temperatures immediately prior to use.  If the problem continues, proceed to the next solution.

Solution 2: Remove or minimize any heat or cold sources near the camera.  If imaging very hot targets, place an insulating shield over the target with an opening large enough to allow infrared emittance to reach the entire diameter of the lens.  If heat from the thermal stage is causing the lens to heat up significantly, use the included polyimide insulation sheets to cover the exposed areas of the stage.

Solution 3: Temperature accuracy is maximized when operating in the lowest temperature range.  Therefore, use the lowest temperature range needed.

Poor Image Temperature Resolution

Symptoms

Images look “grainy” and/or pixel colors change quickly without cause.

Details

For there to be contrast in a thermal image, there must either be temperature or emissivity differences on the target.  If temperature and emissivity are both uniform, there will be very little contrast in the image.

Solution 1: Calibration of IS640 cameras is performed with each lens and may include more than one calibration temperature range.  The lowest range provides optimal temperature resolution and accuracy but has a lower maximum temperature.  The highest calibration range can measure higher temperatures, but with reduced accuracy and resolution.  To maximize accuracy and resolution, always select the lowest calibration range given the maximum temperature measurement required.  If the problem continues, proceed to the next solution.

Solution 2: Make sure the Enable Touchup Calibration button is   on the top toolbar.  When touchup calibrations are enabled, the camera shutter will close periodically in front of the detector, providing a high emissivity surface of uniform temperature to calculate detector response offsets.  When the shutter opens again, the offsets are applied, improving pixel-to-pixel response uniformity.  If the problem continues, proceed to the next solution.

Solution 3: Heat the target using the thermal stage or heat gun to create thermal gradients and increase emissivity contrast.

Periodic Temperature Jumps

Symptoms

The temperature of all pixels in the image jumps every few seconds to higher or lower values.

Details

To maintain temperature calibration accuracy, theIS640 must periodically performing touchup calibrations as the detector temperature changes, resulting in small temperature jumps in the same direction less than 0.1°C.  After turning the camera on, the detector temperature will slowly increase until stable, recalibrating every few seconds.  More frequent recalibrations will also occur when the camera or lens is near heat or cold sources.

Solution 1: Remove or minimize any heat or cold sources near the camera.  Avoid storing the camera in hot or cold areas immediately prior to use.  If the problem continues, proceed to the next solution.

Solution 2: Image temperature jumps have lowest magnitude when operating in the low temperature measurement range.  Therefore, use low temperature range if possible.

Image Aberrations

Symptoms

Image aberrations such as circular patterns or corner/edge temperature deviations.

Solution 1: Make sure that the currently installed lens is selected on the top toolbar.  If the problem continues, proceed to the next solution.

Solution 2: Lens heating or cooling can cause image aberrations that is more prominent in the image corners and edges.  If imaging very hot targets, place an insulating shield over the target with an opening large enough to allow infrared emittance to reach the entire diameter of the lens.  If heat from the thermal stage is causing the lens to heat up significantly, use the included polyimide insulation sheets to cover the exposed areas of the stage.  If the problem continues, proceed to the next solution.

Solution 3: High optical magnification will accentuate small detector response irregularities.  When the 5µm lens is installed, small image aberrations may be noticed that are usually circular in shape.  These aberrations will have a small effect on temperature accuracy and applications not requiring high uniformity, can be disregarded.

Image Ghosting

Symptoms

Image artifacts that have the same shape as hot objects that have be recently imaged.

Details

The IS640 detector is a long-wavelength infrared (LWIR) Amorphous Silicon microbolometer detector.  When LWIR microbolometers view hot targets for prolonged periods of time, detector elements may warp, resulting in temporary changes in response.  This is often observed as “ghosting” in an image.  To prevent permanent damage to the detector, avoid staring at high temperature (> 300°C) targets.  Minor, temporary “ghosting” can sometimes appear even when staring at lower temperature targets.

Solution 1: Make sure the Enable Touchup Calibration button is   and then click the Touchup Calibration   button on the top toolbar to perform a touchup calibration.  When touchup calibrations are activated, the camera shutter will close periodically, blocking any high temperature targets while the shutter is closed.  Intermittent blocking of high temperatures can often prevent image ghosting.  If the problem continues, proceed to the next solution.

Solution 2: To correct for large image ghosting patterns in the image, open the Camera Settings window by clicking the   button in the Camera section of the top toolbar.  Make sure the Enable Uniform Shutter Touchups box is checked and set the Uniform Shutter Touchup Level to 100%.

Solution 3: Allow the detector time to normalize.  This may require up to 60 minutes or longer, depending on the temperature of the hot objects recently viewed.

Image Corner Inaccuracy

Symptoms

Temperature measurements are not as accurate in the corners of the image as near the image center.

Details

Due to the high index of refraction of Germanium and Zinc Selenide, the IS640 lenses have anti-reflective coatings to increase the acceptance angle of incident thermal energy.  Despite this improvement, a fraction of the thermal energy originating from the corners of the target strikes the lens at high angles and is reflected, not refracted into the lens.  This reduction in energy throughput results in a decrease in sensitivity at the image corners.

Solution 1: When conducting measurements, place the area-of-interest in the center of the image.  If the target fills the entire field-of-view, consider using a lens with wider FOV.

    Maintenance

Lens Cleaning

Delicate Lenses: Please follow these instructions carefully to avoid lens damage.

Precautions

To protect the lens from damage, follow these guidelines.

  • Never touch the lens with hard or abrasive objects.

  • Do not use solvents to clean the lens.  Solvents may remove the lens coating.

  • Do not use lens cleaning papers or tissues to wipe the lens.  These products are abrasive and will scratch the lens.

Lens Cleaning Kit

This is provided with your camera and includes the following components.

  • Air bulb blower

  • Lens cleaning solution

  • Wiping cloth

  • Cotton swabs

Lens cleaning Procedure

Excessive dust or debris on the camera lens can reduce measurement accuracy.  To clean the lens, follow this procedure.

  1. Use the air bulb blower and brush to remove any dust or loose grit from the lens.

  2. Put a few drops of the cleaning solution on the cloth and gently wipe across the lens (not round and round).  Use only enough pressure to remove the smudges (do not rub hard).

  3. Use the cotton swabs for tougher lens grime but avoid rubbing the same spot over and over.

Camera Calibration

Calibration Checks

We recommend yearly calibration checks to assure that your thermal imaging camera is operating optimally and within its specified accuracy. Calibration checks should be performed at Optotherm where traceable calibration equipment is used, and proper procedures are followed.​

Recalibration

If a calibration check indicates that your camera requires recalibration, the recalibration must be performed at Optotherm. Our cameras undergo an extensive calibration procedure to compensate for ambient temperature drift and image non-uniformity. Calibration labs do not have the proper equipment or procedures in place to perform this recalibration.​

Returning Your Camera

Please contact the Optotherm technical support department for a Return Material Authorization number (RMA#) and return instructions prior to shipping your camera to us.