Abstract: A microscope system whereby microscopic specimens can be continuously and autonomously maintained in focus without sacrifice to the optimum resolution of the objective. The system achieves focus by splitting the image emerging from the objective lens into two pathways, a focus test pathway and an observational pathway. Each pathway contains an electronically indexed lens module. The focus test pathway lens module is continuously varied, resulting in focal variations in its projected image. The focus test pathway lens position is correlated with the focus camera image for optimum focus. The indexed value for the optimum focus, obtained from the focus test pathway, is then compared to the index value of the lens module in the observational pathway where immediate correction is applied if necessary. Therefore, time and three-dimensional information which would be lost with conventional focusing is acquired, processed, and utilized without negative effects to the observational path.

Abstract: A shelf allocation and management system for allocating shelf space among rows of products and for moving the rows of products towards the front of the shelf is disclosed. The system includes a plurality of adjacent side rail assemblies positioned along the shelf extending from front to back. Each side rail assembly includes a generally flat base rail and a rigid divider attached to and extended away from the base rail, wherein at least one row of products may be positioned between the dividers of adjacent side rail assemblies. An unbiased backstop assembly is positioned between dividers of adjacent side rail assemblies, wherein the backstop assembly is movable between the front and back of the shelf and is adapted to advance at least one row of products toward the front of the shelf. A rigid puller member positioned between the dividers of adjacent side rail assemblies is associated with the backstop assembly.