Holographic coaching

摘要

A coaching aid uses a replay unit in which a hologram (6) is illuminated by a light source (1) via a lens (2) and a holographic mirror (4) acting as a spectral filter. An image of, for example, a circle is produced at an apparent distance of some feet. The replay unit may be mounted on an item of headwear and used in training golfers by making them aware of head alignment with respect to the ball.