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4718762 Spectrophotometric method and apparatus  
A two-beam spectrophotometer comprising a monochromator and a beam splitter is provided. In addition to being inclined to the optical axis by an angle α/2 lying in the optical plane, the beam...
4717821 Flat wide-angle lens array with a common focus  
Array of Fresnel lenses moulded in a single sheet of plastic 29 are used in conjunction with a thermal radiation detector 1 to provide intruder alarm apparatus. Each lens defines one detection...
4716293 Accessory for infrared emission spectroscopy  
An accessory for use with spectrophotometers for conducting IR emission spectra analyses of samples comprising a heated highly-reflecting surface for receiving the sample, an apertured reflecting...
4716294 Pyrodetector for the detection of a body entering into its detection area  
A pyrodetector having a concave mirror containing a sensor element arranged in a focus thereof. The sensor element is on a film and is distinguished by a compact structure. The concave mirror is...
4713544 Optical system for the simultaneous reception of thermal and laser radiation  
An optical receiving system for thermal radiation is useable, with slight modification, for the simultaneous, low-loss reception of laser radiation and is nevertheless still composed of standard,...
4710629 Infrared intrusion detector  
In an infrared intrusion detector which evaluates the body radiation of an intruder by means of a dual radiation sensor having two sensor elements arranged in a differential circuit for emitting...
4710619 Apparatus for generating a signal providing information regarding a radiating source, especially an infrared source  
Information regarding an object, especially brightness information, is obned by scanning the object with an optical scanner, especially an infrared scanner to provide a respective analog signal....
4710630 Optical detection system  
An optical system to permit two detectors to see the same field of view includes an angle converting cone, for mixing radiation from a field of view so that it can be applied to two detectors, and...
4709151 Steerable mirror assembly and cooperative housing for a passive infrared intrusion detection system  
The disclosed steerable mirror assembly and cooperative housing for a ceiling mountable passive infrared intrusion detection system of the present invention includes first and second relatively...
4709153 Intruder detector  
To monitor that infra-red radiation element 22 within housing 10 has not been disarmed, for instance by rendering opaque an infra-red transparent element 16 masking a window 12, in the housing 10,...
4707604 Ceiling mountable passive infrared intrusion detection system  
The disclosed ceiling mountable passive infrared intrusion detection system includes a field forming mirror assembly and a focusing mirror assembly cooperative to provide a field of view having...
4707605 Method and apparatus for thermal examination of a target by selective sampling  
Selective thermal examination of a target is provided by scanning the field of view of an infrared detector over predetermined areas of a target. The selection is made by a plurality of infrared...
4705343 Infrared zoom telescope with decentered dome  
A protective dome (14) is provided for a zoom telescope (12) which is located therein. Telescope (12) can be used as an attachment to a prime imaging system (22) such as a FLIR (forward looking...
4703171 Lighting control system with infrared occupancy detector  
A lighting control device utilizes an infrared occupancy detector in order to control the lights in a room or area. The occupancy detector monitors changes in infrared energy, which indicate...
4694173 Nondispersive gas analyzer having no moving parts  
A multi-component non-dispersive gas analyzer of a type typically used to measure the concentrations of gases present in automotive emissions and in breath analyzers has no moving parts and...
4689486 Folded optical system for radiation detection device  
A folded modular optical system adapted for use, for example, in a passive infrared intruder detection device for directing radiation from a plurality of discrete fields of view onto a...
4682030 Infrared radiation detector with integral fresnel lens window  
An infrared radiation detector comprises a pyroelectric detector element in a hermetically sealed housing. The housing comprises a base and cover with an aperture. A Fresnel lens, for example made...
4676652 Multiple pass optical system  
A multiple pass optical system comprising a reflecting objective placed across the path of a radiant flux emitted by an illuminator; the objective being mounted pivotally around its own axis....
4675525 Matrix device for the detection of light radiation with individual cold screens integrated into a substrate and its production process  
The invention relates to a matrix device for the detection of light radiation with individual cold screens integrated into a substrate and to its production process. This device comprises...
4672206 Passive infrared detector  
A passive infrared detector including an optical collector releasably attached to a base with a sensor on which incident infrared radiation directed through the optical collector is focused. The...
4670655 Alarm apparatus for spatial surveillance  
An alarm system for the surveillance of space, with at least one sensor of electromagnetic, in particular infrared radiation, located on the closed inner frontal surface of a rectangular tube...
4661706 Blocker device for eliminating specular reflectance from a diffuse reflection spectrum  
Diffuse reflectance spectra may be obtained that are free from the distortions caused by specular reflections by using an apparatus and method for physically blocking out specularly reflected...
4657397 Light collector and its use for spectroscopic purposes  
The device for collecting the radiation of a light source (20) within a concave mirror comprises a cylindrical or rotationally symmetrical parabolic or elliptical reflector (10'), which is covered...
4647777 Selective gas detector  
A selective infra-red detector is used to determine the amount of a selected gas present in a gas sample. A beam of infra-red energy is passed through a gas sample and into the selective infra-red...
4646071 Infrared-ray sensitive alarm device built into electronic equipment  
An alarm device is built into electrical equipment such as a portable radio receiver or tape recorder and connected to a loud speaker unit for producing an alarm sound by sensing infrared rays...
4645930 Motion detector  
A motion detector of the space surveillance type wherein an elongate box has parallel walls and an aperture opening toward sensors, and a pair of upwardly divergent reflectors is provided for at...
4644164 Compact passive infrared intrusion sensor  
A compact passive infrared detector is provided with a plane mirror which reflects infrared radiation focused by a lens onto a detector arranged between the lens and the reflector.
4644147 Method for deflection of optical rays and an optical arrangement therefor  
A method and apparatus is shown for receiving optical rays with a maximum angle of sensitivity so that a single detector can monitor a wide, spherical angle. This method is used with infrared...
4636631 Photoconducting detector in optical immersion  
The invention relates to a photoconducting detector in optical immersion, comprising a detector wafer in Hg1-x Cdx Te, on a quartz substrate, and a hemispherical lens in CdTe, assembled on each...
4629892 Optically immersed detector assembly  
An optically immersed infra-red detector assembly comprises a planar sapphire substrate bearing a detector with radially disposed lens contact pads. The detector and contact pads are produced by...
4625114 Method and apparatus for nondestructively determining the characteristics of a multilayer thin film structure  
Nondestructive characterization of each of the layers (dn) of a multilayer thin film structure (25) is obtained by directing a first beam of radiation (40) into an optical coupler (37) having a...
4614441 Apparatus for temperature measurement in a saucepan heating system  
This invention provides an apparatus for measuring the temperature of the contents of a saucepan in a heating system comprising a saucepan and its contents placed on and heated by a heating...
4612442 Passive infrared intrusion detection system  
A passive infrared intrusion detector has: a multi-faceted parabolic reflector for dividing a target controlled area into a plurality of optically divided detection zones, for collecting infrared...
4606600 Passive infrared movement detector  
In a passive infrared movement detector having a reflector which directs the radiation from a plurality of fields of vision to an infrared detector arrangement and for this purpose consists of a...
4595832 Thermal sensor with an improved coating  
The disclosure is directed to an apparatus for detecting radiation having wavelengths from about 0.4 μm to about 5.6 μm. An optical coating is applied to a thermal sensor that is normally...
4595833 Multiple internal reflection cell optical system for use in infrared spectrophotometry of liquid and fluidized samples  
The present invention provides reflaxicon optics for directing infrared radiation from a source into the cone-shaped entry end of a cylindrically shaped internal reflection element, as well as for...
4594509 Infrared spectrometer  
An infrared spectrometer comprises first optical means for focussing a beam of light in a point-shaped area of a sample (19), second optical means for focussing upon a detector (26) the light...
4593322 Autofocus system for infrared imaging device  
Apparatus for continuously determining the position of best focus of an objective lens and a system having a video output. The technique uses a transmissive plate of variable thickness located on...
4588261 IR-CCD imager and method of making the same  
An imager includes an imaging device and an lenticular array mounted on the imaging device. The imaging device includes a substrate of a semiconductor material having a pair of opposed major...
4587555 Neutron and X-ray radiation combined inspection means and method  
A radiographic imaging system (10) includes first and second housing segments (10a, 10b) with the second housing segment (11b) having a low-light-sensitivity television camera (13) mounted...
4566809 Infra-red radiation temperature measurement of a moving wire  
A device and process for measuring infra-red radiation for determining the temperature of wires in lengthwise movement in front of a black background of a heated enclosure constituting a black...
4560875 Infrared absorption gas detector  
An infrared absorption gas detector uses the amount of IR radiation of a particular wavelength to indicate the presence of a particular component or gas. A monitoring head for such a detector...
4558222 Infrared radiation detecting systems  
An infrared radiation detecting system comprises an optical imaging system (25) for receiving radiation from a field of view (23) and delivering that radiation to an image surface (16). A...
4553033 Infrared reflectance densitometer  
An integral, compact infrared reflectance densitometer including a substrate supporting an LED, a control photodiode to compensate for component degradation, a background photodiode to compensate...
4551711 Infrared-type intrusion detector  
An infrared-type intrusion detector for monitoring the presence of a person is disclosed. The detector has a plurality of concave reflector segments for defining separate fields of view. Infrared...
4534614 Aspherical lens for concentrating diffuse optical radiation  
Optical signal detection apparatus suitable for use in diffuse infrared light wave communication comprises an aspherical lens in combination with a photodetector. The lens comprises a body of...
4535240 Intruder detection  
The invention relates to an intruder detector for use in a burglary in which infra-red radiation is imaged onto a sensor 16. The imaging system, which serves to divide the area of surveillance...
4529881 Flame detector with test lamp and adjustable field of view  
A radiation detector for use in hazardous locations, comprising an explosion proof housing with a viewing window and a detector element positioned inside the housing to receive radiation through...
4523095 Radiation detector with asymmetrical pattern  
A radiation detector having a plurality of discrete fields of view with respect to a plurality of sensing elements. The sensing elements are connected such that their output signals are summed to...
4521068 Cooled field optical system for infrared telescopes  
A cooled field optical system which serves for imaging the exit pupil of an infrared telescope with primary mirror having a central hole (Cassegrain system) onto a cooled annular diaphragm (9)...