PM Series™ Imaging Colorimeters and Photometers are highly accurate, CCD-based camera systems designed for making precise, spatial measurements of luminance and chromaticity. PM Series imaging colorimeters are available in four different versions, each appropriate for specific applications to R&D and production for the measurement of light sources, information displays, and other light emitting, reflecting or transmitting materials.

Selecting the correct imaging system for a measurement application requires balancing requirements for resolution, imaging speed, and optical configuration. Radiant Imaging uniquely offers imaging photometers and colorimeters that cover the full gamut of design variables, allowing the best solution to be selected without compromise. Critical parameters to consider are:

Color Accuracy: The ability to accurately match measurements to a color coordinate system, such as the CIE or L*a*b* Color Space; proper selection of color filters and precise calibrations are required to achieve this.

Luminance Accuracy: The absolute accuracy of luminance measurements; calibration to compensate for system noise and photopic filter accuracy are the major factors that improve luminance accuracy.

Dynamic Range: The number of shades of gray into which the system divides luminance measurements; larger dynamic range together with low measurement noise yields greater measurement precision and enables measurement of higher contrast ratios within a single image.

Pixel Resolution: Determines the ability to distinguish fine detail within an image; for a given field of view, higher CCD pixel resolution means greater spatial detail.

Imaging and Readout Speed: This is the time required to capture and readout an image from the CCD. There is often a trade-off between speed, noise and the image detail that can be captured.

Interline vs. Full Frame CCD: The type of CCD used determines parameters such as speed, accuracy and system cost. Interline CCDs allow fast imaging and are generally lower cost; full-frame CCDs capture more complete image data with typically higher dynamic range and lower noise if cooled and temperature stabilized.

Field of View and Aspect Ratio: These parameters are determined by the CCD size and the lens selected. Field-of-view will determine the required working distance between the imaging colorimeter and the object being imaged. The aspect ratio of the CCD — square oe rectangular — can be chosen to suit the application.

Radiant Imaging’s imaging colorimeters and photometers are available in a broad range of configurations, allowing the optimal selection of parameters for a specific application:

Sophisticated System Calibrations Are Performed to Optimize the Performance of Each System

Because there are fine, but detectable, variations in the individual performances of CCDs, filters, and lenses, Radiant performs an extensive series of electrical and optical calibrations on each imaging colorimeter and photometer that we ship. This ensures that the best possible performance is realized from each system shipped.

Sophisticated Control and Analysis Software Provides Ease of Use

All of our PM Series™ imaging colorimeters and photometers include Radiant Imaging’s powerful ProMetric® data acquisition and image processing software. ProMetric simplifies measurement set-up and control and provides easy access to a broad range of image analysis capabilities, including 2D and 3D plotting, histograms, defect detection, and Fourier analysis. Software functions can be externally controlled through PMEngine™ .Net controls (Framework 2.0) so users can build custom test and analysis sequence in Visual Studio 2005 or other .Net compatible programming languages. A limited set of ActiveX controls is also supported.

In addition, PM Series imaging colorimeters and photometers can be used with Radiant Imaging’s application specific software for production testing of displays (PM-PTS™), display color balancing (PM-PTS-DCB™), LED screen correction (VisionCAL™) and lighting strip measurement, keyboard and keypad analysis (PM-KB™), OLED measurement (PM-PTS-ODP™ and -OSP™), flat panel view angle performance measurement (PM-FPMS™), and large light source luminous intensity distribution measurement (PM-NFMS™).