SQM-100 System - Overview

• Single Shot Capture
• Resolution - Tube Dependent
  • 8 microns for 0.55" Screen
• Defect Analysis
  • Auto Detection
  • Characterization
• Luminence Uniformity
• Screen Image Data Base
  • Image & Data Archival
  • Statistical Control
  • Life Tracking
• Industrial Digital Camera
  • 8MP (3500 x 2300)
  • Adjustable Magnification
• Portable Unit
• Rapid Calibration

Use for:

• Incoming Inspection
• Field Testing
• Failure Analysis
• Screen Life Testing
• Historical Tracking

Thomas Electronics SQM-100 Screen Quality Monitor system satisfies a large range of measurement requirements and permits complete testing and analysis of CRT screens in both rastor and stroke mode. The SQM- 100 is a turn key system that includes a computer controller with a CRT screen rastor/stroke generator and a CCD data acquisition camera controlled by a synchronous shutter generator. Also included is a five axis computer controlled positioning system which allows for quick connect and disconnect of CRT model configurations. Screen information is displayed using a Windows user interface and screen analysis results are graphically displayed as well as written to text files and Paradox database files. Complete CRT screen analysis is achieved in less than 5 minutes.

System Components

Screen Rastor / Stroke Generator

For complete versatility, the QMS-100 incorporates drive electronics for both a rastor screen generation and a stroke screen generation.

Synchronous Camera Trigger Generator

The QMS-100 Camera shutter is precisely controlled with a synchronous camera trigger system that generates an electronic shutter signal to the camera in sync with the horizontal raster of the CRT screen.

Mechanical Camera and CRT Screen Fixture

Precision positioning control stages provide travel for the camera in the focus (X) axis and the CRT Screen in the horizontal (Y) and vertical (Z) axis. Additional two axis precision tilt control is offered to the CRT Screen. To offer easy portability, the Camera and CRT Screen mounting fixture is only 24" x 8" x 10" and weighs less than 25 lbs. The fixture flexibility offers fast and easy interchangeable CRT screen mounts.

System Software

The SQM-100 system runs on a Windows 2000 platform where a Graphical User Interface (GUI) permits easy point and click operation and control of the system. CRT Screen analysis data is generated in text file reports, Paradox database, and also displayed in full color graphics for easy interpretation.

CCD Camera

The SQM-100 Camera is a digital 8 Mega pixel 2300 x 3500 CCD with synchronous shutter control and a 50mm lens. A CRT screen element size for a 0.51” screen is 8 microns, square.

Computer System

The SQM-100 is integrated with a 1.8 GHz Celeron Pentium 4 processor and an 18" monitor.

CRT Screen Analysis

Screen Analysis Stroke Mode

Fully automated Windows based software analyzes the spot size and line width in stroke mode. Results are reported to a text based report, Paradox database and full color graphics for easy interpretation.

Screen Analysis Rastor Mode

Fully automated Windows based software allows the system operator to identify a screen blemish with point and click operation. A complete blemish analysis includes size, contrast ratio and separation. A screen blemish map is generated with zone definitions. The CRT Screen results are reported to a text file report, Paradox database and also displayed in full color graphics for easy interpretation.