vds 69871-01, Operation & Maintenance Manual

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2-1
Section 2
AU
User Controls, Settings and Operation
2.1 Introduction
ACON Ultra ( AU ) utilizes a non-calibrated grayscale camera to correct the geometry and convergence
of a Marquee family projector. The system functions within several assumptions. The projector and
the camera are both firmly mounted and do not physically move relative to the projection facet. The
AU camera has the capability to index the camera position such that the entire projection facet is
visible to the camera. AU utilizes a near-infrared CCD grayscale camera, thus ambient light levels
must be minimal, and must be constant throughout the entire setup/memorization/correction process.
After the projector has been optimally setup (mechanically and electronically) AU can be used to
memorize, and then later to correct for small changes in the geometry that occur on a day to day
basis. Before memorization can take place,
AU must be taught a series of test points – camera view
points on the projection facet used for obtaining measurements. Each test point is configured with
the camera indexer (motor) coordinates, expected image quality settings (projector and camera
contrast and brightness type settings), and several flags indicating the state of the test point. The
camera utilizes a stepper motor based indexer platform working on half-steps. This gives a very high
level of repeatability when the camera is positioned at a specific location. This allows the location of
the camera to be used as a physical constant by which to refer measurements.
The complete setup and calibration should only need to be done once in the lifetime of the
AU
configuration unless the physical relationship of the camera to the projector or to the projection facet
changes; in which case the complete Setup and Calibration operations may need to be performed
again. After observing
AU perform several correction runs, it may be noticed that some test points
are not performing optimally. Some of these Setup and Calibration operations can then be used to
tweak
AU performance.
Before discussing actual system setup and calibration procedures, it is helpful to describe the AU
tools that will be used. Section 2.2 discusses the ACON Ultra user interface. Included is a discussion
of the AU main window, the maintenance windows (used in setup and calibration), and several other
support interfaces. Descriptions of all control items are included. Section 2.3 provides a detailed
explanation of the
AU
Setup process. This explanation covers initial setup and calibration procedures
as well as procedures for day to day operations. Section 2.3 outlines and summarizes each step of
the initial setup and configuration procedure.
2.2
User Interface for
ACON Ultra
NOTE: This version of the manual (2.0), covers the implementation of software version 2.0. This
software update includes significant changes to the user interface compared to manual
version 1.3 and software version 1.0.
2.2.1 The Graphical User Interface (GUI)
The main part of this system is the operating software and the GUI. This section illustrates the GUI
and explains the operation of each function.