MICROSCOPE - Magnification -m = magnifying power of microscope. The normal magnifying power of a microscope is the ratio of the Numerical Aperture (N.A.) of the microscope objective to that of the eye. visual angle of image through microscope m ______________________________________________ visual angle of object seen directly mo= lateral magnification of objective. me = angular magnification of eyepiece. m = mo me (Eq. 305)

Target coordinates are measured with a continuously scanning eiectro-optical system. Azimuth and elevation angles are measured passively using the 0.5-to-1.1-11 portion of the spectrum, and range is measured actively with a pulsed array of gallium arsenide laser diodes. Coordinates of several targets can be measured simultaneously 0 0 if they are in the 360 x 30 field of view.

Digitization and calculation on video pictures were accomplished in real time. Video pictures were subtracted and added in order to achieve an enhanced difference picture. The number n of video frames varied from 2 to 2048. Enhancement of signal-to-noise (S/N) ratio went nearly as VII, and S/N ratios of 1700:1 were obtained in about 1 min. A new design is presented to raise the digitizing rate from the present 180 kHz to 2.4 MHz in order to improve resolution. The application is to the measurement of solar magnetic fields, which are proportional to small differences between solar pictures of opposite polarization. A sensitivity increase of NTri and real time display will provide a possible solar flare warning system. Other applications are mentioned.

The output of a pulsed laser is generally monitored as a function of time. The spatial properties of the beam, when they are measured, are usually time integrated. A study which provides a time resolved view of the spatial properties can often yield valuable insight into the overall behavior of the system. For example, if a laser radiates from small areas of the rod which shift with time, the resulting spread of the beam is more directly associated with this area than the apparent area obtained from an integrated observation. Standard high-speed framing and streaking cameras can be used to study the output of the conventional pulsed lasers, since much useful information can be obtained with their microsecond resolution. When the laser is operated in the giant-pulse mode, the camera must have a temporal resolution better by several orders of magnitude. This improved resolution can only be accomplished through electronic or electro-optical techniques.

This paper will give the transmission behavior of various length light guides made of synthetic fibers. Comparison will be made between different lengths and fiber sizes, with bundle diameters held constant. An attempt has been made to firmly locate absorption bands suspected to exist within these fibers at approximately .9 microns. The nature of material studies either in process or anticipated will also be covered, the objectives of which will be to improve the color, brightness and wavelength efficiency of polymer fibers.

In research with carbon arcjets, a need arose to transpose the experimentally determined correct exposure settings for one set of conditions to others with the same exceedingly high light levels of the jet. It appeared that the transpositions could be accomplished more rapidly and accurately if the EV system could be expanded both in extent and detail. How this was accomplished is explained.