Abstract: A moving holographic image is projected into three space by producing a series of slides or fixed holographic images in quick succession in a process similar to a conventional motion picture All of the slides are produced on a single photochromic surface in succession by writing on the surface with UV light. Each slide consists of a set of identical strip holograms positioned on the photochromic surface as an array. Each strip hologram is produced by creating a series of traces arranged side by side. As the maxima traverse the surface, the UV source is turned on and off according to a program to produce a series of dots of either unchanged or darkened color on the photochromic surface. During the next scan a new set of unchanged or darkened dots are produced on each strip hologram, and so on until the slide is completed. After being illuminated the surface is quickly washed clean in preparation for the next slide by illuminating it with a burst of high intensity UV light.

Abstract: The invention is a trailer designed for use with catamarans and perhaps other multi-hull vessels which are intended to be trailed on the highway but have a beam when sailing much broader than the permissible widths of vehicles allowed on the highway, so that the hulls are separate and can be collapsed together for trailing, and expanded to the proper width and assembled with frame support members when ready to sail. The trailer is designed to carry this type of vessel and has a pair of elongated cradles mounted on the ends of outrigger beams which are swung outwardly to put the hulls at the proper spacing for attachment for sailing, with the outrigger beams being swung inwardly by a central traveling beam to which they are pivoted to draw the cradles together side by side in transport-ready position on the trailer.