Radiant Vision Systems' ProMetric® I-SC Solution combines the capabilities of a ProMetric I Imaging Colorimeter with an advanced spectrometer to provide a unified platform for spectrum data gathering and accurate, repeatable color measurement across a range of devices, testing conditions, and time.
Features
- Spectral and spatial measurement data can be simultaneously captured by users using a single solution.
- Reliable and accurate measurements that meet CIE
- Ongoing activities, like fully automated data collection and system calibration
Two Measurement Systems in One
ProMetric I-SC Solution provides a unified platform for measuring chromaticity (CIE xy and u'v'), brightness (cd/m2), and spectral data to evaluate the appearance of light-emitting devices such as screens, light sources, and illuminated components.
The ProMetric I-SC Solution combines the capabilities of a premium spectroradiometer (CAS 140D from Instrument Systems GmbH) and a specially designed tristimulus imaging colorimeter (ProMetric I-series from Radiant) using a polarization-insensitive mirror.
Radiant Vision Systems' proprietary technology (US Patent No. 8482652) is the foundation of this creative design. The ProMetric I-SC combines two systems into one unit, enabling manufacturers to effectively and smoothly implement complete light and color measurement capabilities.
Image Credit: Radiant Vision Systems
Advantages of the ProMetric I Imaging Colorimeter
The ProMetric I-SC Solution utilizes Radiant's ProMetric I Imaging Colorimeter for light and color measurement. ProMetric I systems are designed for manufacturing inspection to meet the speed and precision requirements from R&D to production. They offer best-in-class image performance for metrology applications.
The ProMetric I61 (61-megapixel) Imaging Colorimeter can measure any region of interest quickly and precisely, even down to display subpixel-sized portions. It can record a whole gadget in a single shot.
The ProMetric I's integrated tristimulus color filter wheel provides a system response inherently similar to CIE color-matching functions. The system's color channels are almost perfectly aligned with the CIE response curves.
This increases the effectiveness of each system calibration by allowing the system to maintain precision even if the device's color deviates slightly from the initial calibration point.
ProMetric I expedites the measuring process by obtaining the maximum precise data for each data point in less than two seconds for full-color measurements.
The ProMetric I-SC solution uses the optical setups of the ProMetric I-series imaging colorimeter to provide spectral and spatial measurements in unique settings.
For example, the ProMetric I-SC can record measurement data at the near-eye position from virtual and augmented reality headsets using Radiant's AR/VR Lens.
This setup places the spectrum measurement points inside the headset to collect exact spectral data, enabling the detection of defects, brightness, and spatial chromaticity throughout the angular field of view.
Illustration of the innate spectral response of the ProMetric I Imaging Colorimeter for each color channel (dotted lines) as compared to the standard CIE color-matching functions (solid lines). Image Credit: Radiant Vision Systems
Highly Accurate Spectral Data
The ProMetric I-SC system gathers spectral data using an imaging colorimeter to take a picture of the device being tested and a fiber-optic cable directing light from the device's center point to the spectrometer.
The spectrometer provides an extremely accurate spectral measurement by evaluating each light beam wavelength that falls between 380 and 780 nm. Using this data, one can determine:
- Color Rendering Index (CRI)
- Color Temperature Correlation (CCT)
- Spectral bandwidth [full-width half-maximum (FWHM)]
- Spectral distribution
- Prevailing wavelength
- Peak wavelength
Spectral values are measured from a central point on the measurement image captured by the combined imaging colorimeter. When applied to an image, the appropriate spectral measurement coordinates can be calculated and utilized to achieve incredibly accurate placement of this spot about the test instrument.
For example, the spatial position of the spectral measurement point is provided in x and y coordinates and angular degrees for inspection within AR or VR headsets.
For quick contextual visualization, the program also displays the measurement point and range of view of the linked spectrometer as a graphical element (rectangle or circle) on the measurement image.
Image Credit: Radiant Vision Systems
Spectral data can be used to monitor changes in emission spectra, define device output, and evaluate devices about predetermined tolerances.
Spectral data can be saved, exported, or used as a reference to calibrate the linked imaging colorimeter's response using CIE color-matching functions for new devices and device states (e.g., a different-colored backlit component or display).
Field of view of the integrated spectrometer shown as a circle in the center of the measurement image in software, located at a defined x, y measurement point. Image Credit: Radiant Vision Systems
Engineered to Maximize Capability and Utility
For device qualification, certain applications call for the combined capabilities of an imaging system and a spectrometer. The imaging system must provide accurate chromaticity (CIE xy or u'v'), luminance (cd/m2), and visual inspection for every point in an image, while the spectrometer must provide highly precise values of Color Rendering Index (CRI), Correlated Color Temperature (CCT), etc.
Manufacturers must source and buy spectrometers and imaging systems separately because they can only use one system for measurement at a time, requiring several stations or processes.
In these situations, manual data transfer and setup could result in significant downtime or introduce problems at any point.
The ProMetric I-SC enables Radiant to combine the capabilities of both systems into a single solution, saving the headache of buying separate systems or becoming familiar with each platform.
Moreover, direct integration makes system functionality possible when personal involvement is not required. Without moving the equipment, users can track output, directly apply color calibrations, and quantify spectral and spatial data simultaneously on a source.
The overall capability of the solution is enhanced by incorporating the capabilities of both systems into the ProMetric I-SC.
Users cannot specify or examine a spectrometer's spectral measurement point position when it is used independently of an imaging system; instead, they must use the context of measurement images.
The spectrometer may gather spectral data in any area visible to the imager from the same comparable position and angle because it uses the imaging colorimeter's optics.
Image Credit: Radiant Vision Systems
Intuitive Software Interface and Data Visualization
Using application-specific software modules and Radiant's TrueTestTM Software, the ProMetric I-SC Solution can be utilized for automated measurement, visual inspection, equipment control, and communications.
TrueTest makes possible Radiant's wide range of display measuring capabilities and the ability to organize tests for a fast, automated evaluation of all comparable display attributes in seconds.
Users can set up an automated software procedure to execute calibration operations and calibrate the ProMetric I-SC on demand using TrueTest. The TrueTest interface comprises a unique view for matching or outputting data points and seeing spectral data that the linked spectrometer has recorded.
The spectral data window in TrueTest Software shows the CIE 1931 chromaticity coordinates and spectral plot for data captured by the ProMetric I-SC Solution’s integrated spectrometer. The above image plots the spectral data measured at the center of a white OLED display. Image Credit: Radiant Vision Systems
ProMetric I-SC Solution Key Features and Highlights
- Use a combination imaging colorimeter or spectrometer for quick and accurate color measurement.
- Fast measurement and communication to support production needs.
- Spectral measurement capability, output, and data display.
- Calibration can be done automatically or on-demand based on user-specified software settings.
- CIE-matched color filters positively correlated with human visual perception when quantifying brightness and chromaticity values.
- Suitability for any TrueTest software version
- In conjunction with a ProMetric I61 Imaging Colorimeter designed specifically (61-megapixel resolution).
- With an intuitive UI, spectrum and colorimetric measurement data viewing, application, and exporting are easy.
- Used optionally with Radiant's AR/VR Lens to enable measurement and calibration within the headset.