Accession Number : AD0435628


Title :   TELESCOPE TUBE EFFECTS ON OPTICAL TURBULENCE.


Descriptive Note : Final rept.


Corporate Author : LAND-AIR INC HOLLOMAN N MEX


Report Date : Jan 1964


Pagination or Media Count : 20


Abstract : Schlieren instrumentation was utilized to study the optical effects of heat transfer between telescope tubes and the air within the tube. A method was devised to reduce these effects. Metal tubes were set up in a schlieren system and heated by infra-red lamps to simulate the heating by sunlight which is experienced by telescope tubes under field conditions. In the laboratory setup, the air currents around the tubes could be controlled so that refractive effects of the flow of heated air could be observed in a schlieren system. The effect on seeing was studied as the tubes were heated by the infra-red lamps and as other parameters were changed. (Author)


Descriptors :   *TELESCOPES , THERMAL PROPERTIES , PIPES , INFRARED LAMPS , HEAT TRANSFER , AIR , INSTRUMENTATION , MEASUREMENT , THERMISTORS , MODEL TESTS , PHOTOGRAPHS , LIQUID COOLING , DIFFRACTION , DISTORTION , OPTICAL IMAGES , REFRACTION


Distribution Statement : APPROVED FOR PUBLIC RELEASE