Imaging system, imaging controller, and method and program for vertical synchronization

An imaging controller connected to an imaging device for producing images of objects and picture signals through a transmission line,

• wherein the imaging controller includes a delay-measuring circuit and a vertical-synchronization phase-advancing circuit;
• wherein the imaging controller transmits a test signal to the imaging device and receives the test signal returned from the imaging device, and the delay-measuring circuit measures a delay of a phase of the returned test signal relative to a phase of the transmitted test signal;
• wherein the vertical-synchronization phase-advancing circuit advances a phase of an external vertical synchronizing signal by the delay and transmits the external vertical synchronizing signal to the imaging device for resetting the phase of an internal vertical synchronizing signal at the image device, the internal vertical synchronizing signal being synchronized with the external vertical synchronizing signal having the advanced phase that is transmitted from the vertical-synchronization phase-advancing circuit, the internal vertical synchronizing signal transmitted to the imaging controller to form a delayed internal vertical synchronizing signal such that the delayed internal vertical synchronizing signal and the external vertical synchronizing signal are synchronized without manual phase adjustment regardless of varying the imaging device and imaging controller distance.

A method for controlling an imaging controller for vertical synchronization comprising the steps of:

• transmitting a test signal from the imaging controller to an imaging device;
• measuring a delay of a phase of the test signal returned from the imaging device to the imaging controller relative to a phase of the transmitted test signal;
• and
• advancing a phase of an external vertical synchronizing signal by the delay and transmitting the external vertical synchronizing signal to the imaging device for resetting the phase of an internal vertical synchronizing signal at the imaging device, the internal vertical synchronizing signal being synchronized with the transmitted external vertical synchronizing signal having the advanced phase, the internal vertical synchronizing signal transmitted from the imaging device to the imaging controller to form a delayed internal vertical synchronizing signal such that the delayed internal vertical synchronizing signal and the external vertical synchronizing signal are synchronized without manual phase adjustment regardless of varying the imaging device and the imaging controller distance.

A non-transitory computer-readable recording medium for storing a vertical synchronization program for an imaging controller to execute, wherein the imaging controller executes the steps of:

• transmitting a test signal from the imaging controller to an imaging device;
• measuring a delay of a phase of the test signal returned from the imaging device to the imaging controller relative to a phase of the transmitted test signal;
• and
• advancing a phase of an external vertical synchronizing signal by the delay and transmitting the external vertical synchronizing signal to the external device for resetting the phase of an internal vertical synchronizing signal at the imaging device such that the internal vertical synchronizing signal and external vertical synchronizing signal having the advanced phase are synchronized, the internal vertical synchronizing signal being synchronized with the transmitted external vertical synchronizing signal having the advanced phase, the internal vertical synchronizing signal transmitted from the imaging device to the imaging controller to form a delayed internal vertical synchronizing signal such that the delayed internal vertical synchronizing signal and the external vertical synchronizing signal are synchronized without manual phase adjustment regardless of varying the imaging device and the imaging controller distance.