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3543029 HOT BOX DETECTOR FOR RAILWAY ROLLING STOCK  
3492058 DETECTOR LENS ASSEMBLY  
3489008 RADIATION TEMPERATURE SENSOR  
3483721 MATERIAL TESTER  
3476938 GUN-FLASH DETECTOR  
3464757 DAY-NIGHT OPTICAL VIEWING DEVICE  
3461284 HEAT DETECTING SYSTEM  
3448276 CONDENSER-TYPE OPTICAL SYSTEM WITH CONICAL LIGHT PIPING MEMBER FOR RADIATION DETECTOR  
3448267 APPARATUS FOR INFRARED SCANNING HAVING A VARIABLE DETECTOR APERTURE AND A VARIABLE BANDWIDTH AMPLIFIER  
3448268 COATING INSPECTION METHOD AND APPARATUS USING INFRARED RADIATION  
3444739 RADIANT ENERGY MEASURING INSTRUMENT  
3428815 DISTANCE MEASURING SYSTEM USING INFRARED RING-AROUND OSCILLATOR WITH A REFERENCE LOOP HAVING A LIGHT CONDUCTING ROD  
3413468 Means for improving the optical gain of an infrared detector  
3409772 Vertical air temperature gradient determination  
3407297 Infrared laser beam detection utilizing a cavity resonator  
3397314 Infrared imaging system comprising an array of immersed detector elements  
3395608 Apparatus for measuring the roughness of the surface of a workpiece by metering the frequency output of a laser with the workpiece forming an end reflector  
3394253 Infra-red gas analysis apparatus having a cylindrical sample chamber with a smooth reflecting inner surface  
3377912 Spectral photometric scanner using a fabry-perot etalon rotated about an axis inclined to the optic axis of the scanner  
3368078 Radiant energy sensitive device  
3363962 Infrared optical system comprising three lens elements  
3287556 Laser long-path infrared multiwave-length absorption spectrometer  
3282100 Fine wire calorimeter  
3239675 Optically immersed photoconductive cells  
3234380 Infrared analyzer with means responsive to a detector output to control radiant energy emission from a reference source  
3227032 Energy conducting fibers formed of sapphire cladded with quartz  
3222522 Infrared detector utilizing an integrating sphere radiometer  
3203306 Optical ray concentrator  
3198946 Apparatus for sensing position of a radiation reflector  
3194964 Infrared detecting system  
3161772 Hyperimmersed bolometer system  
3094623 Radiation operated dimensional gage  
3093742 Extended radiation micrometer gage  
3091694 Method and apparatus for measurement of temperature  
3064128 Measuring apparatus  
3064255 Radiant energy follower system  
3059113 Folded immersed bolometer  
3025744 Spectrometer  
3020792 Reflector optical system  
3020406 Energy detection apparatus  
3017513 Fire detection apparatus  
3002092 Optical system for infrared target tracking apparatus  
2999151 Bi-directional hot box detector  
2994053 Selective bolometer  
2985759 Ferroelectric devices  
2984747 Radiant energy detecting and collecting apparatus  
2976730 Pyrometer construction  
2972743 Combined infrared-radar antenna  
2964636 Optically immersed photoconductive cells  
2938141 Photothermionic image converter with retarding fields