Method for producing holograms of moving objects

Claim 1

In the method for producing a hologram of a movable object having an arbitrary shape and reflecting quality wherein a beam for illuminating the object and a reference beam are produced from the same monochromatic light source, the reference beam interfering in a hologram plate with scatter light reflected from the object for formation of a hologram, the improvements wherein said light source is constituted by a light beam having a small aperture angle, said beam being split by a divIder plate into the object illuminating beam and reference beam and which are fanned out to illuminate the object and hologram plate respectively, and wherein for compensating for movement of the object in the direction of the angle bisector between the axis of the object illuminating beam and the mean direction of the scatter light reaching to the hologram plate a mirror is mounted on the object and one of said beams is conducted over said mirror such that the difference between the mean path lengths of the object illuminating beam and of the object light, on the one hand, and that of the reference beam, on the other hand, remains substantially constant during the exposure, said beam which is conducted over said mirror being focussed thereon by means of a collecting lens whose optical axis is substantially parallel to the said direction of movement of the object, and said beam being collimated again in the same collecting lens.