Analysis device for determining the length of a detection period contributing to a latency time in an immersive virtual reality system

An analysis device for an immersive virtual reality system comprising at least one target that can be secured to an object that can move in a space, and detection means for detecting the current position of said target in said space and delivering a first signal representing said current position, said device comprising:

• i) said object equipped with said target,
• ii) a sensor for generating a second signal when said object reaches a known position in said space,
• iii) analysis means that is which receives signals from said sensor and detection means and which is used to determine a first time when a first signal representing said known detected position is received, and a second time when said second signal is received, and then to determine a time difference between said determined first and second receiving times, and
• iv) a rail on which said object can move and which can be placed in said space in such a manner that said object can move to said known position.