Methods, apparatuses, and systems associated with a sample testing device are provided.

A flow cell includes a cell into which a liquid to be measured is introduced and is arranged so that a measurement light to be used for measuring an optical characteristic of the liquid enters one side of the cell and exits from the other side of the cell, an inlet for leading the liquid to flow into the cell, and an outlet for leading the liquid in the cell to flow out from the cell. The inlet and the outlet are provided to form an interface between a liquid flowing into the cell through the inlet and a liquid with which the cell has been already filled at two places on an optical path of the measurement light passing through the cell.

A flow cell includes a cell into which a liquid to be measured is introduced and is arranged so that a measurement light to be used for measuring an optical characteristic of the liquid enters one side of the cell and exits from the other side of the cell, an inlet for leading the liquid to flow into the cell, and an outlet for leading the liquid in the cell to flow out from the cell. The inlet and the outlet are provided to form an interface between a liquid flowing into the cell through the inlet and a liquid with which the cell has been already filled at two places on an optical path of the measurement light passing through the cell.

Methods, apparatuses, and systems associated with a sample testing device are provided.

Methods, apparatuses, and systems associated with a sample testing device are provided.

An Optico-dynamic Light Tunnel is provided. This apparatus provides visual assessment of the entire pathway of a lens field. This apparatus may include linear strands of light that can be created and their propagation pathways visualized. This apparatus may stratify light strands to create an optical tunnel. This apparatus may apply this optical tunnel to lens objects to dynamically analyze optical properties over the entire lens field pathway and in multiple dimensions.