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FPD Conoscope Lens

A conoscope lens measures the angular distribution of color, luminance (brightness), and contrast from displays and display components. Radiant's FPD Conoscope Lens captures a full cone of view angle data in a single measurement to ±70 degrees. You get quick, accurate results, making the system ideal for both R&D projects and in-line production quality control. The lens is well-suited to a wide range of display types including those based on LCD and OLED technologies, as well as backlights.

This Spec Sheet features:

  • Applications
  • Benefits
  • Key Features
  • Specifications
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TrueMURA™ Display Mura Analysis License for TrueTest™ Software

License to enable additional tests for evaluation of display mura according to human visual perception.

Human visual recognition of uniformity variations and other defects in displays is dependent on many factors including brightness, color, shape, size, and severity of deviations within the area of the display. Developed to allow automated visual inspection systems to accurately identify JND—artifacts just noticeable by a human observer—TrueMURA evaluates display mura (areas of non-uniformity) in a way that simulates a human observer’s perception of defect severity. These algorithms can ignore mura that is imperceptible to human observers and identify various types of mura that can be passed and failed based on evaluation criteria.

Part of the Radiant Vision Systems TrueTest Software family, the TrueMURA license supplements the many benefits of TrueTest Software to efficiently perform image-based measurements for luminance, chromaticity, and adds specific tests to evaluate over 15 types of display mura.
 

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TrueMURA_types of display mura
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Comprehensive Display Test Suite

The TrueMURA Software license provides several mura tests in addition to what is offered in standard TrueTest Software. TrueMURA allows users to define a complete set of measurement parameters and set pass/fail criteria for different types, locations, and severities of mura in an image. The software license includes specific tests for identification and measurement of mura types including:

  • Black Mura
  • Blob Analysis
  • Butterfly Mura
  • Corner Light
  • Diagonal Line Mura
  • Edge Mura
  • LED Mura
  • Line Mura
  • Spot Mura
  • TrueMURATest

Available in standard TrueTest™ Software:

  • Color Edge Mura
  • Color Mura
  • Diagonal Pattern Mura
  • Polarizer Deformation
  • Spot Pattern Mura
Truemura_black mura measurement

 

TrueMura_black mura analysis


Captured image of display with mura (top), shown with TrueMURA analysis applied (Black Mura analysis example) (bottom).

Part of the TrueTest platform, any tests from the TrueMURA test library can be added to a sequence (which are stored, so multiple sequences can be created and recalled as needed), and test parameters and pass/fail settings can be input for each test. The entire sequence can be run end-to-end automatically. Individual test results are displayed and can be recorded in a report.

TrueMURA_jnd_just noticeable difference

Just Noticeable Differences

Radiant’s TrueMURA Software is the first commercial system to provide advanced image analysis algorithms for computing JND (“Just Noticeable Differences”) in displays. These tests augment the defect analysis functions already available in Radiant’s TrueTest Automated Visual Inspection Software, including a complete test suite to evaluate luminance, chromaticity, and common display defects (non-uniformity, dead pixels, lines, and more). The JND detection algorithm incorporated in TrueMURA is based on U. S. patent 7,783,130, “Spatial Standard Observer” (SSO) technology, licensed by Radiant Vision Systems from the National Aeronautics and Space Administration (NASA).

TrueMURA_JND analysis

JND analysis image (left) and outputs (right). TrueMURA analysis provides output of maximum, total, and single JND values.

Complete Measurement Solution

True MURA Display Test Solution

TrueMURA can be used with a ProMetric Imaging Colorimeter or Photometer, providing multiple options to achieve the field of view, pixel resolution, dynamic range, and cost requirements for your application.

Supported by Radiant's global support staff and distributor network, TrueMURA is field-proven and has been used to test displays in the latest high-value devices worldwide.
 

TrueMURA License Key Features and Highlights:

  • Applies photometric and colorimetric measurement to values captured by imaging systems that simulate human visual perception of light and color
  • Includes tests to detect over 15 types of display mura and pass/fail on visual appearance
  • Single display test platform from R&D to production reduces cost and variability in display image quality assessment
  • Objective, numerical evaluation of display mura using algorithms for computing JND (“Just Noticeable Differences”) based on U.S. Patent 7,783,130 licensed by Radiant from NASA
  • Data analysis functions including bitmaps, isoplots, and cross-sections

Supported Products:

System Requirements:

 

Specifications subject to change without notice.

Typical Applications

TrueMURA enables evaluation of displays beyond standard TrueTest software tests to evaluate mura defects according to human visual perception.

  • Display mura characterization for evaluation and design
  • Detection of display mura with pass/fail thresholding for automated visual inspection
  • Production quality control of display devices

 

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Here Comes the Sun: Our Source of Life & Light

Cables, Connectors, and Screws (Oh My!): Improve Detection of Common Assembly Defects to Reduce Latent Failures

Photometry-based assembly verification performs better than typical machine vision or human inspectors when it comes to catching subtle defects in complex electromechanical assemblies, helping decrease your rate of escapes and latent product failures. Radiant’s INSPECT.assembly™ solution can detect and prevent misrouted cables, missing screws, or misaligned connectors that could pinch, detach, or loosen with use, resulting in failures after products ship.

In this technical note, you will learn:

  • The benefit of photometry-based imaging systems for detecting subtle or subjective defects
  • The impact of defects like misrouted cables, missing screws, and misaligned connectors
  • Imaging specifications that enable Radiant's INSPECT.assembly to detect details in complex assemblies that can lead to product failures, even after devices pass functional test and other inspection processes
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Senior Advisor | CEO Emeritus

ISO/IEC 17025 Accreditation Certificate

Radiant Vision Systems is pleased to offer ISO 17025 calibration certificates on request for combinations of cameras and lenses in our product lines of ProMetric® Y-Series Imaging Photometers and ProMetric® I-Series Imaging Colorimeters. Radiant’s calibration laboratory in Redmond, WA has received NVLAP accreditation to ISO/IEC 17025:2017.

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Advanced Vision: How Photometry-based Imaging is Revolutionizing Surface Inspection, Glass and Particle Inspection, and Assembly Verification

 

Are you facing a tough visual inspection challenge with your devices?

Looking for a better way to prevent escapes, latent failures, and product returns? 

Machine vision has been a boon to manufacturers, allowing visual inspection to be done at production line-speeds with consistency, repeatability, and objective data. Yet there are some visual inspection tasks that are beyond the capability of typical machine vision systems. Complex assemblies, subtle surface defects, areas of low-contrast, and glass or transparent materials require a higher level of visual acuity, which has often been provided by human inspectors. Human inspectors, however, can be costly and subject to inconsistency and fatigue.

Advanced Vision combines the benefits of machine vision inspection systems with the power of true human vision.

Based on photometric imaging principles for light measurement, our sophisticated imaging technologies and software algorithms offer capabilities that go beyond traditional machine vision systems when used for inspection of devices and non-lit surfaces. Advanced Vision applies high-resolution, high-dynamic-range, and low-noise imaging that matchesor even exceedsthe acuity of human vision to detect flaws. 

Ideal for cosmetic surface inspection, high-precision assembly (e.g., verifying component presence and placement), glass inspection, and particle detection, Advanced Vision solutions can help you achieve absolute product quality while improving throughput, increasing inspection accuracy, reducing escapes, and ensuring customer satisfaction.

In this eBook you'll learn about:

  • What makes your "hard" inspection problem so hard—including complexity, lack of contrast, and unpredictability of defects
  • A comparison of different visual inspection methods (humans, machine vision, photometry-based imaging) and how they address various production and quality parameters
  • How photometry-based vision works and the importance of image resolution, dynamic range, and signal-to-noise ratio when it comes to precision inspection
  • How to solve manufacturing quality challenges in cosmetic surface inspection, glass/transparent layers, and electromechanical assemblies
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Enterprise Applications for Augmented/Virtual Reality Offer Machine Vision Real-World Opportunities

Machine vision has begun to overlap with augmented and virtual reality. Not only does machine vision provides pivotal environmental and user information to the AR/VR system, these technologies are also cooperating to enable enterprise operations in industrial manufacturing, assembly, design, and training. In this article, Radiant Vision Systems Chief Solutions Officer, Doug Kreysar, contributes his thoughts on AR/VR technology development, which brings together camera systems, near-IR eye tracking, gesture recognition, and other machine vision capabilities that improve the visual performance and extend the application of AR/VR headsets.

Published by AIA Vision Online on December 5, 2019.

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Near-Infrared Sensing

Radiant's near-infrared (NIR) measurement solutions help ensure the accuracy of NIR emitters used for facial & gesture recognition and other 3D sensing applications. NIR light covers wavelengths of the electromagnetic spectrum from approximately 750 to 2500 nanometers (nm), which is beyond human visual perception. NIR-based sensing  provides machines with information about objects in the physical environment. When NIR light is emitted and reflected off of an object, an NIR sensor receives the reflected light or light pattern to gauge the distance, size, location, and identifying features of objects in the three-dimensional world.

NIR light is ideal for 3D sensing applications because it is invisible to the human eye, making it unnoticeable when cast into a user’s face, eyes, or environment. Proper filtering can remove the visible light spectrum for NIR sensing devices, increasing reliability for sensing in ambient light conditions or poor visibility conditions like rain or fog. However, because the human eye does not respond to NIR light, it is important to measure the emissions from NIR LEDs and lasers that will be used for 3D sensing of humans and their environments.

Users of Radiant NIR measurement systems benefit from turnkey solutions combining high-resolution imaging radiometers, optical components, and software test libraries for common analyses. Software tests in Radiant’s TrueTest Software platform include pass/fail parameters and custom output, and can be run in sequence to efficiently characterize and qualify light sources used for facial & gesture recognition, eye tracking, and other NIR-based 3D sensing applications.

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