Iris Optical QC™

Iris Optical QC™

Arrayjet has developed an optical quality control of printed features, which is now available on our Marathon series of instruments as an upgrade.


The Iris system consists of twin cameras mounted on both sides of the print head.  Each camera takes images immediately after printing as the print head travels across the slides. One camera is needed for each direction of printing (L-R and R-L).

The images are taken and processed in real time and the quality of the printing for each slide and the whole batch is reported when the printing is complete. 

The images can be accessed immediately and/or can be saved for future reference and traceability.

Missing spots are detected and counted.  Other defects such as artefacts, merging spots and misalignments are also detected.

A final report will inform the user of the percentage of spots missing and a percentage of the other defects.


The user has the option to select a threshold for quality of the printing. Percentage of missing spots and other defects can be chosen from the setup window before the printing starts. 

Positional accuracy and spot diameter variations can also be reported if requested.


The reporting of the printing quality of each individual slide includes images taken in real time showing the printed spots and also the numerical data of the defects encountered when images are analysed by the Iris software.

A global report for the quality of the whole manufacturing run is also produced.

Data and images for each printing run can be saved in a unique way ensuring total traceability of manufacturing runs.

The software highlights to the user the defects found and categorises the defect type such as missing spot, artefact, merging spots, satellites present or misalignment.