US Patent Class 250
RADIANT ENERGY



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Current as of: June, 1999
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  DF  CLASS NOTES
250  DF  RADIO AND MICROWAVE ABSORPTION WAVEMETERS
251  DF  ELECTRICALLY NEUTRAL MOLECULAR OR ATOMIC BEAM DEVICES AND METHODS
252.1  DF  CALIBRATION OR STANDARDIZATION METHODS
253  DF  GEOLOGICAL TESTING OR IRRADIATION
254  DF  .~ With drill or drilling
255  DF  .~ With sampling
256  DF  .~ Well testing apparatus and methods
257  DF  .~.~ With casing collar detection
258  DF  .~.~ By interface of fluids
259  DF  .~.~ With placement of tracer in or about well
260  DF  .~.~.~ Tracer being or including radioactive material
261  DF  .~.~ With detector or detector circuit control
262  DF  .~.~ With particular detector signal circuit
263  DF  .~.~.~ With detector signal modulation or carrier wave
264  DF  .~.~.~ Having plural detectors
267  DF  .~.~ With radiation control to detector
268  DF  .~.~ With well-engaging means
269.1  DF  .~.~ With source and detector
269.2  DF  .~.~.~ With plural types of detectors
269.3  DF  .~.~.~ Having gamma source and gamma detector
269.4  DF  .~.~.~ Having neutron source and neutron detector
269.5  DF  .~.~.~.~ Having thermal neutron detector
269.6  DF  .~.~.~ Having neutron source and gamma detector
269.7  DF  .~.~.~.~ With plural gamma detectors
269.8  DF  .~.~.~.~ With detection in plural consecutive time intervals
265  DF  .~.~ Plural detectors
266  DF  .~.~.~ With spacing or direction of detectors
271  DF  CODED RECORD AND READERS; INVISIBLE RADIANT ENERGY TYPE
281  DF  IONIC SEPARATION OR ANALYSIS
282  DF  .~ Methods
283  DF  .~.~ With collection of ions
284  DF  .~.~.~ For material recovery
285  DF  .~ With plural, simultaneous ion generators
286  DF  .~ Ion beam pulsing means with detector synchronizing means
287  DF  .~.~ With time-of-flight indicator
288  DF  .~ With sample supply means
289  DF  .~ With evacuation or sealing means
290  DF  .~ Cyclically varying ion selecting field means
291  DF  .~.~ Circular ion path
292  DF  .~.~ Laterally resonant ion path
293  DF  .~.~ Alternating field ion selecting means
294  DF  .~ Static field-type ion path-bending selecting means
295  DF  .~.~ With variable beam shifting field means
296  DF  .~.~ Plural diverse-type static path-bending fields
297  DF  .~.~.~ For causing complex ion path
298  DF  .~.~ Magnetic field path-bending means
299  DF  .~.~.~ With detector
300  DF  .~.~.~.~ With detector control or regulating
301  DF  METHODS OF DETERMINING OIL PRESENCE, CONTAMINATION OR CONCENTRATION
302  DF  RADIATION TRACER METHODS
303  DF  .~ Radioactive tracer methods
304  DF  METHODS INCLUDING SEPARATION OR NONRADIANT TREATMENT OF TEST MATERIALS
305  DF  ELECTRON ENERGY ANALYSIS
306  DF  INSPECTION OF SOLIDS OR LIQUIDS BY CHARGED PARTICLES
307  DF  .~ Methods
308  DF  .~ Including a radioactive source
309  DF  .~ Positive ion probe or microscope type
310  DF  .~ Electron probe type
311  DF  .~ Electron microscope type
440.11  DF  .~ Analyte supports
441.11  DF  .~.~ With air lock or evacuation means
442.11  DF  .~.~ With object moving or positioning means
443.1  DF  .~.~ With heat transfer or temperature-indication means
315.3  DF  SOURCE WITH CHARGED PLATE-TYPE DETECTOR
316.1  DF  WITH INFRARED OR THERMAL PATTERN RECORDING
317.1  DF  .~ Thermal copying of documents
318  DF  .~.~ With image transfer device
319  DF  .~.~ With conveying means
324  DF  CORONA IRRADIATION
325  DF  .~ Charging of moving object
326  DF  .~ Charging of objects
580  DF  SOURCE WITH RECORDING DETECTOR
581  DF  .~ Using a stimulable phosphor
582  DF  .~.~ With image recording
583  DF  .~.~.~ For specialized application
584  DF  .~.~ With image read-out
585  DF  .~.~.~ Including stimulation
586  DF  .~.~.~ Including emission detection
587  DF  .~.~.~.~ With adjustment of conditions
588  DF  .~.~ With erasure
589  DF  .~.~ With conveyance
590  DF  .~.~.~ With a recirculation path
591  DF  .~ Including a light beam read-out
328  DF  AUTOMATIC/SERIAL DETECTION OF SIMILAR SOURCES
329  DF  RECORD PROJECTORS
330  DF  INFRARED-TO-VISIBLE IMAGING
331  DF  .~ Including liquid crystal detector
332  DF  .~ Including detector array
333  DF  .~ Including image tube-type detector
334  DF  .~ Including means for scanning field of view
335  DF  CLOUD OR BUBBLE CHAMBERS
336.1  DF  INVISIBLE RADIANT ENERGY RESPONSIVE ELECTRIC SIGNALLING
336.2  DF  .~ Superconducting type
337  DF  .~ With heating of luminophors
338.1  DF  .~ Infrared responsive
338.2  DF  .~.~ Ferroelectric, ferromagnetic, photomagnetic types
338.3  DF  .~.~ Pyroelectric type
338.4  DF  .~.~ Semiconducting type
338.5  DF  .~.~ With means to analyze uncontained fluent material
339.01  DF  .~.~ With selection of plural discrete wavelengths or bands
339.02  DF  .~.~.~ Including detector array
339.03  DF  .~.~.~ Including temperature control means
339.04  DF  .~.~.~ Including temperature determining means
339.05  DF  .~.~.~ With additional noninfrared wavelengths
339.06  DF  .~.~.~ With radiation source
339.07  DF  .~.~.~.~ Including spectrometer or spectrophotometer
339.08  DF  .~.~.~.~.~ Including Fourier transform infrared spectrometry
339.09  DF  .~.~.~.~ With calibration steps in measurement process
339.1  DF  .~.~.~.~ Determining moisture content
339.11  DF  .~.~.~.~ Measuring infrared radiation reflected from sample
339.12  DF  .~.~.~.~ Using sample absorption for chemical composition analysis
339.13  DF  .~.~.~.~.~ With gaseous sample
339.14  DF  .~.~.~ Detecting infrared emissive objects
339.15  DF  .~.~.~.~ Sensing flame or explosion
340  DF  .~.~ Methods
341.1  DF  .~.~.~ With irradiation or heating of object or material
341.2  DF  .~.~.~.~ Including probe
341.3  DF  .~.~.~.~ Including polarizing means
341.4  DF  .~.~.~.~ With semiconductor sample
341.5  DF  .~.~.~.~ With calibration
341.6  DF  .~.~.~.~ Heating of object or material
341.7  DF  .~.~.~.~ With multiple sources
341.8  DF  .~.~.~.~ Measuring infrared radiation reflected from sample
342  DF  .~.~.~ Locating infrared emissive objects
343  DF  .~.~ With means to transmission-test contained fluent material
344  DF  .~.~.~ Plural series signalling means
345  DF  .~.~.~ Plural beam/detector pairs
346  DF  .~.~.~.~ Plural temperature sensitive signalling means
347  DF  .~.~ With movable beam deflector or focussing means
348  DF  .~.~.~ Controlled by signalling means
349  DF  .~.~ Plural signalling means
350  DF  .~.~.~ With periodic beam varying means
351  DF  .~.~ With periodic beam varying means
352  DF  .~.~ With temperature modifying means
353  DF  .~.~ With beam deflector or focussing means
354.1  DF  .~ Signalling means controls incident radiation
356.1  DF  .~ Flow metering
356.2  DF  .~.~ Using radioactive tracer
357.1  DF  .~ Fluent material level signalling
358.1  DF  .~ With means to inspect passive solid objects
359.1  DF  .~.~ Rectilinearly moving object
360.1  DF  .~.~ With relative movement means
361 R  DF  .~ With or including a luminophor
362  DF  .~.~ Methods
363.01  DF  .~.~ With radiant energy source
363.02  DF  .~.~.~ Body scanner or camera
363.03  DF  .~.~.~.~ With positron source
363.04  DF  .~.~.~.~ Emission tomography
363.05  DF  .~.~.~.~.~ With detector support
363.06  DF  .~.~.~.~ Using coded aperture
363.07  DF  .~.~.~.~ With distortion correction
363.08  DF  .~.~.~.~ With detector support
363.09  DF  .~.~.~.~ With calibration
363.1  DF  .~.~.~.~ With a collimator
364  DF  .~.~.~ With fluent source handling or collecting means
365  DF  .~.~.~ Ultraviolet light source
366  DF  .~.~ Plural electric signalling means
367  DF  .~.~ Plural or composite luminophor
368  DF  .~.~ With optics
369  DF  .~.~ With output system
361 C  DF  .~.~ Chemiluminescent detection
370.01  DF  .~ Semiconductor system
370.02  DF  .~.~ Alpha particle detection system
370.03  DF  .~.~ Fission fragment/fissionable isotope detection system
370.04  DF  .~.~ Self-powered system
370.05  DF  .~.~ Neutron detection system
370.06  DF  .~.~ Discrimination-type system
370.07  DF  .~.~ Dose or dose rate measurement
370.08  DF  .~.~ Imaging system
370.09  DF  .~.~.~ X-ray or gamma-ray system
370.1  DF  .~.~ Position sensitive detection system
370.11  DF  .~.~ Scintillation system
370.12  DF  .~.~ Of material other than germanium, diamond, or silicon
370.13  DF  .~.~.~ Containing cadmium telluride
370.14  DF  .~.~ Particular detection structure (e.g., MOS, PIN)
370.15  DF  .~.~ Temperature control or compensation system
371  DF  .~.~ Methods
372  DF  .~ Ultraviolet light responsive means
373  DF  .~.~ With means to transmission-test contained fluent material
374  DF  .~ Including a radiant energy responsive gas discharge device
375  DF  .~.~ Methods
376  DF  .~.~ With electroscopic indicators
377  DF  .~.~.~ With charge generator
378  DF  .~.~.~ With charge storage means
379  DF  .~.~ With means to supply the gas
380  DF  .~.~.~ Radioactive gas, or with gas-borne radioactive material
381  DF  .~.~.~ With radioactive source
382  DF  .~.~ With means to ionize the gas
383  DF  .~.~.~ Emissive fluent type, or with transmissive fluent material
384  DF  .~.~.~ Radioactive
385.1  DF  .~.~ Plural chambers or three or more electrodes
385.2  DF  .~.~.~ Spark chambers
386  DF  .~.~ With a periodic electrode bias varying means
387  DF  .~.~ With periodic electrode bias supply
388  DF  .~.~ With indicator
389  DF  .~ Including ionization means
390.01  DF  .~ Neutron responsive means
390.02  DF  .~.~ Radiographic analysis
390.03  DF  .~.~ With dose measurement
390.04  DF  .~.~ Composition analysis
390.05  DF  .~.~.~ For moisture content
390.06  DF  .~.~ Density/thickness/consistency analysis
390.07  DF  .~.~ Spectrum analysis
390.08  DF  .~.~.~ Using time-of-flight spectrometers
390.09  DF  .~.~.~ Using diffractometers
390.1  DF  .~.~ Including beam control
390.11  DF  .~.~ Including a scintillator
390.12  DF  .~.~ Position-sensitive
391  DF  .~.~ Methods
392  DF  .~.~ With indicating or recording means
393  DF  .~ With radiant energy source
394  DF  .~ Plural signalling means
395  DF  .~ Methods
200  DF  PHOTOCELLS; CIRCUITS AND APPARATUS
201.1  DF  .~ Photocell controls its own optical systems
201.2  DF  .~.~ Automatic focus control
201.3  DF  .~.~.~ Of a microscope
201.4  DF  .~.~.~ Active autofocus
201.5  DF  .~.~.~.~ With optical storage medium; e.g., optical disc, etc.
201.6  DF  .~.~.~ Based on triangulation
201.7  DF  .~.~.~ Based on contrast
201.8  DF  .~.~.~ Based on image shift
201.9  DF  .~.~ Light beam wavefront phase adaptation
203.1  DF  .~.~ Following a target (e.g., a star or instrument pointer or other object) other than a pattern
203.2  DF  .~.~.~ Target illuminated by artificial light source
203.3  DF  .~.~.~ Self-luminous target
203.4  DF  .~.~.~.~ Sun
203.5  DF  .~.~.~.~ Cathode-ray tube scanning
203.6  DF  .~.~.~.~ Airborne target, or spaceborne target other than the sun (e.g., star or missile)
203.7  DF  .~.~.~.~ With moving reticle in optical path
202  DF  .~.~ Following a pattern (e.g., line or edge)
548  DF  .~.~ Controlling web, strand, strip, or sheet
549  DF  .~.~ Cathode-ray tube
204  DF  .~.~ Adjusting optical system to balance brightness in plural paths
205  DF  .~.~ Controlling light source intensity
550  DF  .~ Interference pattern analysis (e.g., spatial filtering or holography)
551  DF  .~ Signal isolator
552  DF  .~ Solid state light source
553  DF  .~.~ Array or matrix
554  DF  .~ Flame light source
559.01  DF  .~ With circuit for evaluating a web, strand, strip, or sheet
559.02  DF  .~.~ Evaluation of photographic film
559.03  DF  .~.~ Sequential detector arrangement
559.04  DF  .~.~ Evaluation by regions, zones, or pixels
559.05  DF  .~.~.~ With imaging
559.06  DF  .~.~.~ With scanning
559.07  DF  .~.~ With imaging
559.08  DF  .~.~.~ With camera
559.09  DF  .~.~ With polarization
559.1  DF  .~.~ With calibration
559.11  DF  .~.~ Detection of both reflected and transmitted light
559.12  DF  .~.~ Beam interruption or shadow
559.13  DF  .~.~.~ With laser source
559.14  DF  .~.~.~ With rotation of material
559.15  DF  .~.~.~ With plural detectors
559.16  DF  .~.~ Detection of diffuse light
559.17  DF  .~.~.~ With diffusion optics
559.18  DF  .~.~.~ With discrimination of discrete light diffusing region
559.19  DF  .~.~ Measuring dimensions
559.2  DF  .~.~.~ With comparison to reference or standard
559.21  DF  .~.~.~ Volume
559.22  DF  .~.~.~ Profile
559.23  DF  .~.~.~.~ With triangulation
559.24  DF  .~.~.~ Transversal measurement (e.g., width, diameter, cross-sectional area)
559.25  DF  .~.~.~.~ Lumber
559.26  DF  .~.~.~ Longitudinal measurement (e.g., length or spacing)
559.27  DF  .~.~.~ Thickness
559.28  DF  .~.~.~.~ With translucent material
559.29  DF  .~.~ Measuring position
559.3  DF  .~.~.~ With alignment detection
559.31  DF  .~.~.~ With triangulation
559.32  DF  .~.~.~ Measuring rate of motion or flow (change of position)
559.33  DF  .~.~.~ With robotics
559.34  DF  .~.~.~ Lead or wire bond inspection
559.35  DF  .~.~.~ Centroid
559.36  DF  .~.~.~ Edge
559.37  DF  .~.~.~ Angular orientation (e.g., skew)
559.38  DF  .~.~.~ Determining range from detector
559.39  DF  .~.~ With comparison to reference or standard
559.4  DF  .~.~ With indication of presence of material or feature
559.41  DF  .~.~.~ With foreign particle discrimination circuitry
559.42  DF  .~.~.~ Discontinuity detection (e.g., hole, crack)
559.43  DF  .~.~.~ Break detection
559.44  DF  .~.~.~ Identifying marking, pattern, or indicia
559.45  DF  .~.~.~ With defect discrimination circuitry
559.46  DF  .~.~.~.~ With camera or plural detectors
559.47  DF  .~.~.~.~ With counting means
559.48  DF  .~.~.~.~ With transversal scan
559.49  DF  .~.~.~.~.~ With moving reflector
206  DF  .~ Photocell controlled circuit
206.1  DF  .~.~ Having means to generate positional information in at least one plane of a target moving relative to one or more photodetectors
206.2  DF  .~.~.~ Detection of positional information in two or more planes (e.g., azimuth and elevation; hour angle and declination)
206.3  DF  .~.~.~.~ With moving reticle in optical path
555  DF  .~.~ Including coded record
556  DF  .~.~.~ Document verification or graph reader
557  DF  .~.~.~ With means to position, direct, or detect record
558  DF  .~.~ Stereoplotters
564  DF  .~.~ With circuit for evaluating a fluent material
565  DF  .~.~.~ With comparison
207  DF  .~.~ Electron multiplier
208.1  DF  .~.~ Plural photosensitive image detecting element arrays
208.2  DF  .~.~ Plural photosensitive nonimage detecting elements
208.3  DF  .~.~.~ With electronic scanning
208.4  DF  .~.~.~ Used to switch an electrical circuit or device on or off
208.5  DF  .~.~.~ With photodetector output ratioing other than by bridge or push-pull circuits
208.6  DF  .~.~.~ With specific relative positional geometry of photosensitive elements (e.g., an annular photosensitive element surrounding a coaxially mounted photosensitive element)
210  DF  .~.~ Bridge and push-pull circuits
214 R  DF  .~.~ Special photocell or electron tube circuits
214 P  DF  .~.~.~ Photographic control
214 D  DF  .~.~.~ Light dimmers
214 A  DF  .~.~.~ Amplifier type
214 LA  DF  .~.~.~.~ Light amplifier type
214 LS  DF  .~.~.~.~.~ Switching type
214 VT  DF  .~.~.~.~.~ Vacuum tube type
214 PR  DF  .~.~.~ Photosensitive rheostat type
214 SG  DF  .~.~.~ Self-generating type
214.1  DF  .~.~.~ Special photocell
214 AG  DF  .~.~.~ Automatic gain control
214 AL  DF  .~.~.~ Ambient light responsive
214 B  DF  .~.~.~ Ambient light desensitizing means
214 C  DF  .~.~.~ Compensation
214 DC  DF  .~.~.~ Digital circuitry
214 L  DF  .~.~.~ Logarithmic/linear signal
214 RC  DF  .~.~.~ Rate of change
214 SF  DF  .~.~.~ Slave flash
214 SW  DF  .~.~.~ Electronic switch
215  DF  .~ Combined with diverse-type device
216  DF  .~ Optical or pre-photocell system
227.11  DF  .~.~ Light conductor
227.12  DF  .~.~.~ Optical delay line
227.13  DF  .~.~.~ Light pen
227.14  DF  .~.~.~ Condition responsive light guide (e.g., light guide is physically affected by parameter sensed which results in light conveyed to the photocell)
227.15  DF  .~.~.~.~ With detection of macroscopic break in fiber
227.16  DF  .~.~.~.~ With detection of fiber microbend caused by parameter affecting fiber
227.17  DF  .~.~.~.~ Causing polarization change in fiber
227.18  DF  .~.~.~.~ Causing light spectral frequency/wavelength change
227.19  DF  .~.~.~.~ With coherent interferrometric light
227.2  DF  .~.~.~ With imaging
227.21  DF  .~.~.~ With light chopping or modulation
227.22  DF  .~.~.~.~ Keyboard or other manual switch controlled
227.23  DF  .~.~.~ With spectral frequency/wavelength discrimination
227.24  DF  .~.~.~ With coupling enhancement means
227.25  DF  .~.~.~.~ Fluid coupling
227.26  DF  .~.~.~ With scanning
227.27  DF  .~.~.~ With coherent interferrometric light
227.28  DF  .~.~.~ With specific configuration of light conductor components with respect to each other
227.29  DF  .~.~.~ With specific illumination or viewing orientation of light conductor relative to viewed object (e.g., light normal to, and detector at 45 degree angle to, viewed object)
227.3  DF  .~.~.~ With variable orientation of light conductor relative to viewed object (e.g., goniometer)
227.31  DF  .~.~.~ Side or edge illuminated light conductor or collector
227.32  DF  .~.~.~ End illuminated light conductor with noncircular geometric cross section
566  DF  .~.~ Including coded record
568  DF  .~.~.~ Digital information
569  DF  .~.~.~.~ Card type
570  DF  .~.~.~.~ Tape, drum, or disc types
573  DF  .~.~ Fluent material in optical path
574  DF  .~.~.~ Scattered or reflected light
575  DF  .~.~.~ Plural paths
576  DF  .~.~.~ Sample holder or supply
577  DF  .~.~.~ Volume or level
221  DF  .~.~ Controlled by article, person, or animal
222.1  DF  .~.~.~ Inanimate article
222.2  DF  .~.~.~.~ Particle detection
223 R  DF  .~.~.~.~ Conveyor or chute
223 B  DF  .~.~.~.~.~ Bottles
224  DF  .~.~.~.~ Article and light ray relatively moved during sensing
225  DF  .~.~ Polarizing
226  DF  .~.~ Color (e.g., filter or spectroscope)
228  DF  .~.~ Integrating sphere
229  DF  .~.~ Light valve (e.g., iris diaphragm)
231.1  DF  .~.~.~ Actuated by dynamic external physical quantity
231.11  DF  .~.~.~.~ Actuated by gauge element deflection
231.12  DF  .~.~.~.~ Gyroscopes
231.13  DF  .~.~.~.~ Shaft angle transducers
231.14  DF  .~.~.~.~.~ Incremental shaft readers; i.e., with means to generate increments of angular shaft rotation
231.15  DF  .~.~.~.~.~.~ With plural gear driven discs
231.16  DF  .~.~.~.~.~.~ Using phase difference of output signals from plural photodetectors
231.17  DF  .~.~.~.~.~.~ With means to indicate a complete shaft rotation
231.18  DF  .~.~.~.~.~.~ Position indicating shaft encoders with means to generate a unique signal for each specific angular shaft position
231.19  DF  .~.~.~.~ Pressure-responsive light valves
230  DF  .~.~.~ Reflection type(e.g., mirror galvanometer)
232  DF  .~.~.~ Light chopper type
233  DF  .~.~.~.~ Rotary
578.1  DF  .~.~ Plural light sources or optical paths
234  DF  .~.~ Means for moving optical system
235  DF  .~.~.~ Repetitious path
236  DF  .~.~.~.~ Rotary motion
237 R  DF  .~.~ Hoods, grating, baffles, diaphragms, masks
237 G  DF  .~.~.~ Gratings (moire fringes)
238  DF  .~ Temperature control of photocell
239  DF  .~ Housings (in addition to cell casing)
396 R  DF  WITH CHARGED PARTICLE BEAM DEFLECTION OR FOCUSSING
397  DF  .~ With detector
398  DF  .~ With target means
399  DF  .~.~ Secondary emissive type
400  DF  .~.~ With means to convey or guide the target
396 ML  DF  .~ Magnetic lens
423 R  DF  ION GENERATION
424  DF  .~ Methods
425  DF  .~ With sample vaporizing means
426  DF  .~ Arc type
427  DF  .~ Electron bombardment type
423 P  DF  .~ Photoionization type
423 F  DF  .~ Field ionization type
428  DF  FLUENT MATERIAL CONTAINMENT, SUPPORT OR TRANSFER MEANS
429  DF  .~ With temperature control
430  DF  .~ With valve or pump actuator
431  DF  .~ With cleaning means
432 R  DF  .~ With irradiating source or radiating fluent material
433  DF  .~.~ Including a movable surface transfer means
434  DF  .~.~ Including a gravity-type transfer means
435  DF  .~.~ Including a flowthrough transfer means
436  DF  .~.~.~ Flow-enclosed radiation source
437  DF  .~.~.~ Tortuous path type
438  DF  .~.~.~ With a flow-modifying surface
432 PD  DF  .~.~ Parent-daughter isotope separators
453.11  DF  SUPPORTED FOR NONSIGNALLING OBJECTS OF IRRADIATION (E.G., WITH CONVEYOR MEANS)
454.11  DF  .~ With source support
455.11  DF  .~.~ Source and object encasement (e.g., sterilizers)
458.1  DF  LUMINOPHOR IRRADIATION
459.1  DF  .~ Methods
461.1  DF  .~ With ultraviolet source
461.2  DF  .~.~ Biological cell identification
462.1  DF  .~ Self-luminous article
463.1  DF  .~.~ Dials, pointers, gauges, and bands
464.1  DF  .~.~ Pendants
465.1  DF  .~.~ Manual operators or luminous attachments therefor
466.1  DF  .~.~ Covers, keys, or luminous attachments therefor
467.1  DF  .~.~ Reticles, gun sights or with optical element
472.1  DF  INVISIBLE RADIATION RESPONSIVE NONELECTRIC SIGNALLING
473.1  DF  .~ Methods
474.1  DF  .~ Optical change type
475.2  DF  .~ Photographic type
482.1  DF  .~.~ With radiation filter, modifier, or shield (e.g., dosimeter badges)
483.1  DF  .~ Luminescent device
484.2  DF  .~.~ Requiring an additional energy source to cause luminescence
484.3  DF  .~.~.~ With thermally-stimulated phosphor
484.4  DF  .~.~.~ With optically-stimulated phosphor
484.5  DF  .~.~.~.~ Dosimeter
485.1  DF  .~.~ With light excluding casing having an aperture
486.1  DF  .~.~ With plural luminescent material or plural luminescent containing layers or areas
487.1  DF  .~.~ With optical member of material to directly modify luminous energy
488.1  DF  .~.~.~ Plural planar layer type
489  DF  ION COLLECTORS
491.1  DF  MEANS TO ALIGN OR POSITION AN OBJECT RELATIVE TO A SOURCE OR DETECTOR
492.1  DF  IRRADIATION OF OBJECTS OR MATERIAL
492.2  DF  .~ Irradiation of semiconductor devices
492.21  DF  .~.~ Ion bombardment
492.22  DF  .~.~ Pattern control
492.23  DF  .~.~ Variable beam
492.24  DF  .~.~ Photocathode projection
492.3  DF  .~ Ion or electron beam irradiation
493.1  DF  RADIANT ENERGY GENERATION AND SOURCES
494.1  DF  .~ Plural radiation sources
495.1  DF  .~.~ Including an infrared source
496.1  DF  .~ With container for radioactive source and radiation directing or selectable shielding
497.1  DF  .~.~ With means to move source between shielded and unshielded position
498.1  DF  .~.~ With pivoted or rotatable radiation shield
503.1  DF  .~ With radiation modifying member
504 R  DF  .~.~ Ultraviolet or infrared source
504 H  DF  .~.~.~ Hand-held
505.1  DF  RADIATION CONTROLLING MEANS
506.1  DF  .~ Shielded receptacles for radioactive sources
507.1  DF  .~.~ Having plural storage compartments or plural nested receptacles
515.1  DF  .~ Shields
516.1  DF  .~.~ Garments
517.1  DF  .~.~ Construction elements or building parts
518.1  DF  .~.~ With neutron absorption material
519.1  DF  .~.~ Flexible
522.1  DF  SOURCE SUPPORTS
526  DF  MISCELLANEOUS
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CROSS-REFERENCE ART COLLECTIONS
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900  DF  OPTICAL LIQUID LEVEL SENSORS
901  DF  .~ With gap between light guide elements (includes open light path preset)
902  DF  .~.~ With closed light path preset
903  DF  .~.~.~ With prism contacting liquid
904  DF  .~ With single light guide element to guide light in a continuous path
905  DF  .~.~ With longitudinal irregularity
906  DF  .~.~.~ With large scale longitudinal bend
907  DF  .~.~.~ With portions of light guide coating or cladding removed
908  DF  .~.~.~ With waveguide twisted about its longitudinal axis
909  DF  METHODS AND APPARATUS ANCILLARY TO STIMULABLE PHOSPHOR SYSTEMS
910  DF  FOOD SAMPLE ANALYSIS USING INVISIBLE RADIANT ENERGY SOURCE
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DIGESTS
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DIG 1  DD  Passive intrusion detectors
DIG 2  DD  Radon detection