Investigation of the factors involved in rapid processing at elevated temperatures has led to new films and chemical solutions which are specially designed for very rapid processing of cathode-ray tube recordings. An experimental, laboratory model of a complete, rapid processing system was constructed in order t o study various aspects of the problem. By using special cathode-ray-tube recording films, together with specially formulated developer and fixer, it was possible to demonstrate useful development in less than 2 sec. at 130°F, and clearing in less than 2 sec., at the same temperature. With rinsing and drying requiring 2 sec. each, a processing system is shown to produce rinsed, dried film of high quality in a total time of less than 8 sec.

It is known that three dimensional objects form three dimensional images by using the hologram technique and it has recently been shown that when the photographic record (hologram) is bleached to make a phase hologram, three dimensional images also result. The purpose of this paper is to demonstrate, theoretically these experimental observations. In particular a three dimensional boundary value problem is considered and the resulting three dimensional image is derived both for amplitude and phase holograms and for reflecting and transmitting objects. The speckling that appears superimposed upon the image is also derived from the same model by assuming that rough surfaces in the optical system are random noise generators.

This report reviews the considerations in selecting imaging systems for reproducing images of ground characteristics from a space vehicle. The future capabilities of spaceborne imaging systems are also discussed.

Measurement of the radiation produced by a hypersonic body during re-entry into the earth's atmosphere is' receiving attention under several experimental programs. Imaging radiometers are applicable to this requirement. This type of instrument provides spacial resolution as necessary for individual measurement of closely spaced multiple point sources and for measurement of line source intensity, gradients. Evaluation of S-10 and S-20 image orthicon tubes, in the radiometric application, has been performed. Quantitative results of test's defining radiometric response, resolution, and calibration stability are described, along with a comparison of S-10 and S-20 capabilities.

A contract was awarded by the Naval Air Development Center to design and build a Multiple Scan Correlator. Essentially a radar amplifier, the Multiple Scan Correlator embodies a camera, rapid film processor, and rear screen projector. The film that is exposed during the ten second scan of the radar is processed while the next frame is being exposed. On the next scan of the radar, the exposed developed frame is projected on the screen. Image correlation is achieved by superimposed projection of the most recent eight frames in rapid sequence. This paper describes construction details of the unit, especially the unique flashing lamp system. It also describes the rapid film processor and the problems that were encountered in its development.