A currently available 2-D high-resolution, optical molecular imaging system was modified by the addition of a
structured illumination source, OptigridTM, to investigate the feasibility of providing depth resolution along the
optical axis. The modification involved the insertion of the OptigridTM and a lens in the path between the light source
and the image plane, as well as control and signal processing software. Projection of the OptigridTM onto the imaging
surface at an angle, was resolved applying the Scheimpflug principle. The illumination system implements
modulation of the light source and provides a framework for capturing depth resolved mages.
The system is capable of in-focus projection of the OptigridTM at different spatial frequencies, and supports the use
of different lenses. A calibration process was developed for the system to achieve consistent phase shifts of the
OptigridTM. Post-processing extracted depth information using depth modulation analysis using a phantom block
with fluorescent sheets at different depths.
An important aspect of this effort was that it was carried out by a multidisciplinary team of engineering and science
students as part of a capstone senior design program. The disciplines represented are mechanical engineering,
electrical engineering and imaging science. The project was sponsored by a financial grant from New York State
with equipment support from two industrial concerns. The students were provided with a basic imaging concept and
charged with developing, implementing, testing and validating a feasible proof-of-concept prototype system that was
returned to the originator of the concept for further evaluation and characterization.