single mirror techniques which are shown in fig4 and 5 is shown in fig6 here the mirror 26 is placed between the object plane and camera lens 20 instead of between the camera lens and image sensor the arrangement as shown in fig6 results in a series of energy related images which may be processed to optimize data as previously described this mirror location also reduces the depth of field requirements of the camera lens however a larger mirror assembly is required than if the mirror assembly is after the camera lens the above technique may also be applied to multiple plane systems instead of a single projector plane as shown in fig1 two or more planes are transmitted the resultant image consists of groups of images one group for each transmitted plane the ambiguities between groups of planes may be solved by methods well known to those in the field within each group the images are intensity related and are processed to optimize data as described herein all the above descriptions use solid state cameras with finite arrays of pixels the techniques however are directly applicable to vidicons or any electron beam scan techniques in fact the dynamic range of vidicons may be more limited than solid state cameras due to baseline shading and sensor blemishes therefore systems which use electron beam type cameras would benefit significantly by the techniques described here the video data from these cameras is processed as described herein to optimize data over wide ranges of surface reflectivity characteristics without further analysis the foregoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it.