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4087688 Infrared radiation-burglary detector  
An infrared radiation-burglary detector comprising an optical system for focusing the radiation upon a radiation receiver. One or more internally reflecting prism surfaces enclose the axis of the...
4084092 Radiation scanning system  
An object-space scanning system for radiation wherein the scanning device comprises sets of planar reflecting surfaces arranged in pairs, one from each set, such that the two surfaces in a pair...
4081678 Through-the-lens thermometer apparatus  
Infra-red images are projected onto an infra-red detector whose output is amplified, linearized, digitized and displayed as a numerical value corresponding to the temperature of the object viewed...
4058726 Radiation detector  
A radiation detector for simultaneously detecting electromagnetic radiation from a number of separate receiving regions by means of a single radiation receiver. Optical bundling means are arranged...
4045670 Portable precision radiometer  
The radiometer disclosed herein is battery operated and employs null balance electronics to obtain high precision in a hand-held instrument. A beam splitting optical system combines an image of...
4035644 Atmospheric condition detecting and indicating apparatus and method  
A photo-optic hygrometer comprising a thermocooler with a light reflecting surface has an infrared light beam directed against such surface by an infrared light emitting diode as to reflect such...
4027161 Minimizing wave interference effects on the measurement of thin films having specular surfaces using infrared radiation  
A property of a thin, infrared radiation-transmissive film of plastic or the like with specular surfaces is measured with substantial freedom from errors caused by wave interference effects,...
4024397 Shock resistant encapsulated infrared detector  
A rugged construction for an optically immersed infrared detector is provided along with a method of fabrication which produces an infrared detector which can withstand shock, vibration and high...
3972598 Multifaceted mirror structure for infrared radiation detector  
Infrared radiation can be gathered from a number of discrete, spaced apart fields of view and focused on a single sensing element with a multifaceted mirror. Each facet of the mirror is a concave...
3971940 Detector absorptivity measuring method and apparatus  
A method and apparatus for measuring the absorptivity of a radiation detector by making the detector an integral part of a cavity radiometer. By substituting the detector for the surface of the...
3968365 Film sensor for an X-ray film loader  
A non-contact film sensor is provided for an automatic X-ray film loader. The sensor includes an infrared source having an output which is filtered to be outside the spectral sensitivity of the...
3923382 Multifaceted mirror structure for infrared radiation detector  
Infrared radiation can be gathered from a number of discrete, spaced-apart fields of view and focused on a single sensing element with a multifaceted mirror. Each facet of the mirror is a concave...
3898497 Infrared camera tube  
An infrared camera tube which has a cathode, cathode aperture, focusing lens aperture, photoconductor and obscuring flap. The obscuring flap is located between the cathode and the photoconductor...
3886361 Device for contactless positional indication  
A device for contactless indication of the positional changes in one or more planes relative to a reference plane of a moving body comprising a reflecting, preferably spherical, surface towards...
3867633 Wide angle viewing system for limited visibility conditions  
A system for the navigation of vehicles under conditions of limited visibility is disclosed. The system provides a means whereby an image of the outside world (e.g., terrain, water surface,...
3864567 INFRARED DETECTOR SYSTEM  
3858046 CATADIOPTRIC BEAMSPLITTER SYSTEM  
Optical systems especially suitable for tracking an object which emits infrared energy and directing a laser beam thereto are disclosed each including a lens and a first reflector for reflecting...
3853407 MULTIPLE PATH SPECTROPHOTOMETER METHOD AND APPARATUS  
A multiple path spectrophotometer system is disclosed in which the beam from a radiation source is selectively directed over a plurality of different paths which may contain sample material or...
3849005 METHOD AND DEVICE FOR ESTIMATING A GASEOUS COMPONENT  
The absorption or emission of a characteristic radiation of the component measured. The device comprises two chambers containing a predetermined weight of the component to be estimated. The second...
3839640 DIFFERENTIAL PYROELECTRIC SENSOR  
A low cost mass produced intrusion detection device which responds to a temperature difference between ambient temperature and the body temperature of an intruder who is moving past the sensor....
3825315 ZOOM LENS OPTICAL SYSTEM FOR INFRARED WAVELENGTHS  
There is disclosed a zoom lens optical system suitable for use at infrared wavelengths comprising a fixed position front objective lens group and a variably positioned variator or zoom lens group...
3825795 PHOTOCONDUCTIVE CAMERA TUBE AND METHODS OF MANUFACTURE  
The object of this invention is to provide an improved photoconductive camera tube target of increased extended sensitivity utilizing a target composed of arsenic or antimony doped germanium...
3819944 PHOTOSENSITIVE MAGNETIC DEVICE  
In well-known photomagnetic materials such as YIG and Cd Cr Se the change of magnetic permeability on exposure to light can only be erased by raising the temperature of the material. When using...
3813552 IMAGE ROTATION DEVICE FOR AN INFRARED SCANNING SYSTEM OR THE LIKE  
An infrared scanning system which does not require the use of scanning mirrors is disclosed. A cylindrical device having two cylindrical optical elements arranged in an afocal manner forms an...
3805073 METHOD AND APPARATUS FOR OBTAINING A STEREOSCOPIC THERMAL IMAGE OF INTERNAL AND SURFACE PORTIONS OF AN ARTICLE  
An article, the constituent portions of which have differing thermal heating characteristics, is heated. The thermal response on a surface of the article, which is a thermal image of the...
3800157 WEB INSPECTION APPARATUS  
An infrared radiance measuring apparatus employed to measure defects in a moving continuous web substrate. A series of line filament lamps are in circuit relationship with a single channel photo...
3775620 RADIATION SOURCE SIMULATION MEANS  
Advanced sensor evaluation and test apparatus comprises a vacuum chamber with an inner cryoshroud, housing an on-axis optical parabolic collimator, a radiant energy source assembly having an...
3767922 ELECTRIC ARCS  
A source of electromagnetic radiation comprises two electrodes, means for connecting a voltage across the electrodes sufficient to maintain an arc discharge between them, and means responsive to a...
3764807 SYSTEM FOR CONVERTING INFRARED INTO SHORTER WAVELENGTH RADIATION  
The frequency matched quantum counter principle is used for converting infrared radiation into visible or near visible radiation. The quantum counter or detection screen utilize the properties of...
3760187 APPARATUS FOR MEASURING RADIATION  
The radiation measuring apparatus comprises two absorbent cavities each having a geometrical form of revolution of general trunconical shape with reflecting lateral walls, the outer base being...
3751664 INFRARED DETECTOR SYSTEM  
A detector flake, such as a pyroelectric detector, which has leads going to the two faces of the flake, is mounted in a truncated collecting cone spaced from the truncated end from one quarter to...
3742239 DISCRIMINATING DEVICES  
1. A target discriminating device comprising a plurality of radiation sensitive elements distributed in rows and columns over an image area, means for condensing incident radiation to form an...
3730259 HOT-SPOT DETECTOR FOR HEAT EXCHANGER  
A "hot-spot" detecting arrangement for a heat exchanger that receives a flow of hot exhaust gases containing unburned products of combustion. The arrangement detects "hot-spots" or developing...
3699341 MUZZLE FLASH DETECTOR  
An optical sight with muzzle flash detector for providing a visual indication on the sight image of a muzzle flash of a firearm by passive detection of the IR radiation coming from the flash. A...
3699339 TWO-COLOR RADIOMETER  
The inventive radiometer is capable of measuring the radiant energy of a get or of an event, including a transient event, in two spectral regions with identical fields of view. The invention may...
3681602 DEVICE FOR DETECTING AND RECORDING ELECTROMAGNETIC RADIATION INCLUDING AN ACTIVE MAGNETIC ELEMENT A PARAMETER OF WHICH CAN BE CHANGED BY THE RADIATION  
A device for detecting and/or recording electromagnetic radiation which employs as an active element one which responds to the electromagnetic radiation by changing a magnetic parameter thereof...
3677652 FLUID ANALYZER APPARATUS  
A hollow cell with opposed windows is connected in series with conduits through which automobile exhaust gas to be analyzed flows continuously. A broadband infrared source directs a beam through...
3662170 METHOD AND APPARATUS FOR MEASURING THE THICKNESS MOISTURE PROFILE OF FIBROUS WEBS  
A method and apparatus therefore for measuring the "Z" direction moisture profile in fibrous webs by the use of a pair of backscatter type gauges mounted in operable relationship with a fibrous...
3629585 IMMERSED BOLOMETER USING THIN FILM THERMISTORS  
Differential, immersed, thermistor bolometer formed by a planoconvex, transparent lens-support and two thermistors, one active and one compensation element, both deposited on the flat face of said...
3601611 PRIMARY ABSOLUTE RADIOMETER  
A radiometer is disclosed for use in either ambient atmospheric air or a vacuum environment having a black body receptor cavity in a massive heat sink enclosed in a Dewar Flask. A view limiting...
3591809 FLUIDIC RADIATION SENSOR VARYING THE VISCOSITY OF A FLUID STREAM  
This disclosure includes a fluidic sensor establishing a fluid signal related to the level of radiant energy impressed on the sensor. The sensor is a capillary tube mounted at the focal point of a...
3588506 PHOTOELECTRIC SCANNING AND IMAGE-MODIFYING EQUIPMENT  
3586439 DIRECT READING PYROMETER EMPLOYING PYROELECTRIC CRYSTAL DETECTOR  
A lead zirconium titanate crystal possessing pyroelectric characteristics is employed in a direct reading pyrometer for measuring directly the temperature of an object, principally by the infrared...
3581089 CATADIOPTRIC REFLEX RADIATION DETECTION CONVERSION, LOCATION AND DISPLAY DEVICE  
A system for detecting and locating short duration radiant energy pulses urring in the nonvisible portions of the spectrum by converting each event of pulsed energy within a region of an...
3571572 RADIATION BALANCE HORIZON SENSOR WITH AN EARTH TANGENCY MASK  
A horizon sensor of the radiation balance type is described with an earth tangency mask so that the horizon sensor detectors are illuminated only by a narrow band of radiation at the horizon of...
3566119 INFRARED SCANNING DEVICE USING A SPHERICAL LENS  
The scanning of graphically displayed information may be accomplished using infrared energy. The necessary elements include a source of infrared energy, a means for concentrating the energy on a...
3562527 INSULATED SIGNAL COUPLER  
A signal-coupling device for signal coupling but electrically insulating two parts of an electronic circuit. The device has a gallium arsenide diode and a photoelectric receiving cell both in a...
3554628 INFRARED OPTICAL SYSTEM UTILIZING CIRCULAR SCANNING  
3551676 AIRCRAFT COLLISION WARNING SYSTEM WITH PANORAMIC VIEWING REFLECTIONS  
3544988 PICTURE MOTION DETECTION SYSTEM