Photo-instrumentation techniques and systems for full scale automobile collision research are demonstrated and described. Representative examples of specific experimental collisions in which photo-optical instrumentation played a key part will be discussed in detail in conjunction with film presentations of the actual collisions.

Artillery type projectiles are evaluated in flight for flight integrity and surface-evident structural failures by Los Alamos Scientific Laboratory, Group W-3, by three photographic techniques: (1) range surveillance and gross failures by high speed framing cameras, (2) multiple observations along the firing range by Drum-Film-Image-Synchronized cameras, and (3) photo-chamber, suppressed light microflash photography, utilizing plate and/or drum cameras.

THE ROLE OF LIGHT SCATTERING It is well known to every student in oceanography that the sea contains a variety of particles of different composition, shape and size. Basically the particulate material can be classified into inorganic and organic matter. The latter is found in variable proportions averaging 20 - 60% (determined from carbon x 2 = dry organic matter) of the total particle content. Most of the organic matter is detritus and the living com-ponent is normally less than 20%.

One of the major considerations in designing cameras and television systems for use in outer space is the effect of the space environment on focus and picture geometry. Many navigation and guidance systems, such as star trackers, require a pointing accuracy not to exceed one second of arc. A change of two or three units in the sixth decimal place of refractive index, corresponds to a change of one second of arc in angular deflection of the light rays in these systems. Thus a careful evaluation of the refractive properties of glass components should be made when designing systems for space environments.