System Description 20
Figure 3:2 Cutaway view of the imager
3.5.1 CCD Camera and Telecentric Lens
The instrument uses a very sensitive, high-resolution CCD camera and lens system to detect light emitted from MULTI-ARRAY and
MULTI-SPOT plates. The custom-designed lens provides high efficiency and uniform collection of ECL generated light. For optimal
sensitivity, the camera sensor is cooled to a temperature of -25 °C and maintained at this temperature within a control band of ±2 °C.
3.5.2 Motion Control System
The instrument uses a high-precision mechanism for transporting plates from the input stack, into the CCD camera’s viewing area, and
back to either the input or output stack, depending on user setup in the DISCOVERY WORKBENCH software. See Section
4 Installation,
Quick Start, and General Use for more information on reading a plate.
3.5.3 Plate Barcode Reader
The instrument uses a single, internal barcode reader to identify the plate at the beginning of a plate read. The barcode information allows
DISCOVERY WORKBENCH software to identify the plate type and to read and interpret the plate data correctly.
For certain applications, users may be interested in applying custom barcode labels. Custom barcodes may be placed on the side of the
plate next to the MSD barcode.
Figure 3:3 illustrates where custom barcode labels may be placed. Custom barcodes must be either
Code 39 or Code
128, with a minimum line width of 7 mils.
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