Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 4437762 | Control of detector gain hysteresis in a single beam spectrophotometer Gain hysteresis exhibited by the photomultiplier detector of a single beam spectrophotometer is reduced by illuminating the detector and applying dynode voltage thereto during the normal "off" or "idle" interval of the spectrophotometer.... | 03/20/1984 |
| 4415811 | Optical scanning apparatus An apparatus for the optical scanning of objects in which the light from at least one light source falls on at least one light-sensitive sensor and the objects to be scanned are disposed between the light source and the sensor. The sensor comprises a larg... | 11/15/1983 |
| 4396288 | Control of multi-position filter mechanism in an optical measuring system A method of identifying an operating position of a multiple-position filter changing mechanism situated in an optical path of a spectrophotometer by detecting and measuring a spectral characteristic(s) of light passed along the optical path to the spectro... | 08/02/1983 |
| 4391522 | Test apparatus for determining resistance to light and weather influences To provide for more reliable determination of resistance of sample surfaces to light and weather influences, test apparatus is equipped with a radiation-measuring device. A portion of radiation used for testing is guided to the measuring device, by quartz... | 07/05/1983 |
| 4382656 | Non-imaging optical energy transfer system A non-imaging optical energy transfer system includes a tapered light pipe and associated field lens as its central energy transfer mechanism. The light pipe/lens combination is located between two separate sections of the system which individually have t... | 05/10/1983 |
| 4377342 | Zeeman atomic absorption spectrophotometer In a Zeeman atomic absorption spectrophotometer, an atomic absorption signal in an atomization stage is observed. The length of time between an instant at which the signal initially attains a predetermined absorbance and an instant at which the signal att... | 03/22/1983 |
| 4375919 | Multiple entrance aperture dispersive optical spectrometer A dispersive optical spectrometer is disclosed which comprises light detection means, dispersion means for separating light radiation into spectral components and for directing the spectral components toward the light detection means, means for admitting ... | 03/08/1983 |
| 4373813 | Control of system energy in a single beam spectrophotometer A single beam spectrophotometer is conditioned to automatically scan a sample across a wavelength scan range and to measure the sample at selected wavelengths within the range. Methods of setting output signal gain, adjusting signal gain for a selected wa... | 02/15/1983 |
| 4310243 | Spectrophotometer with photomultiplier tube dark signal compensation In a spectrophotometer including a photomultiplier tube and an operational amplifier responsive to the current from the photomultiplier tube for generating a DC voltage proportional to light intensity, a method and means for simultaneously compensating fo... | 01/12/1982 |
| 4305662 | Sample excitation situs enhancement apparatus for a spectrometer A sample excitation situs or light source enhancement apparatus for an optical spectrometer comprising a mirror arranged to reflect an image of the excitation situs in close proximity to the actual excitation situs is disclosed.... | 12/15/1981 |
| 4304491 | Single sensor spectrometer with high spatial and temporal resolution A spectrometer for use with optical elements which pass both undispersed and dispersed irradiation onto detectors coupled to a transversal filter and a comparitor means which open gates said filter to receive dispersed signals when an initial undispersed ... | 12/08/1981 |
| 4293222 | Control apparatus for spectrophotometer The control apparatus is used with a dual beam spectrophotometer in which light of variable frequency from a light source is split into two beams which are directed along first and second optical paths to a photosensitive device. The control apparatus com... | 10/06/1981 |
| 4279510 | Spectrophotometer with improved photomultiplier tube dark signal compensation In a spectrophotometer including a photomultiplier tube responsive to light for producing an analog current proportional to the intensity thereof, an analog-to-digital converter, a signal path from the photomultiplier tube to the analog-to-digital convert... | 07/21/1981 |
| 4273442 | Spectral photometer for medical applications A spectral photometer emits light towards an object of interest, receives e light reflected back from the object of interest, and includes a timer or synchronizer operative for causing the spectral photometer to produce an output signal whose successive v... | 06/16/1981 |
| 4264205 | Rapid scan spectral analysis system utilizing higher order spectral reflections of holographic diffraction gratings An improved optical system is disclosed for rapid, accurate spectral analysis of the reflectivity or transmissivity of samples. A concave holographic diffraction grating oscillated at high speed is utilized to provide a rapid scanning of monochromatic lig... | 04/28/1981 |
| 4241997 | Laser spectrometer with frequency calibration A laser beam from a tunable laser is split into two paths containing an etalon and a sample cell respectively. The two paths are chopped at different frequencies. The paths are combined and fed to a monochromator and then detected by a single detector. Lo... | 12/30/1980 |
| 4239390 | Method of obtaining high resolution light scattering spectra High resolution scattering spectra are obtained from irradiation of a sample with monochromatic light without disturbing the position of the sample, the spectra being characterized by freedom from artifacts due to the presence of optical components which ... | 12/16/1980 |
| 4227079 | Multipath fine positioning beam director A beam directing device is provided which employs one or more mirrors mounted on a single rotatable shaft. The orientation of the shaft controls the rotational orientation of these directing mirror(s) to direct the beam toward any of a number of sample or... | 10/07/1980 |
| 4215273 | Multispectral scanner optical system Disclosed is an optical system for use in a multispectral scanner of the type used in video imaging devices. Electromagnetic radiation reflected by a rotating scan mirror is focused by a concave primary telescope mirror and collimated by a second concave ... | 07/29/1980 |
| 4192614 | L/C detector cell assembly A spectrophotometer detector cell assembly having improved sensitivity, has a cell defined by a bore through a body and closed at the ends by radiation transparent windows with inlet and outlet passages through the body to the bore, so that radiation pass... | 03/11/1980 |
| 4187026 | Photoacoustic method and apparatus for measuring intensity of electromagnetic radiation Electromagnetic radiation is detected, using a photoacoustic cell employing a uniform absorber of radiation which absorbs independently of wavelength.... | 02/05/1980 |
| 4184768 | Self-calibrating photoacoustic apparatus for measuring light intensity and light absorption Pulsed light and readily measurable pulsed electrical energy are independently applied to a solid black, conductive sample in a gas-filled photoacoustic cell, each causing the black sample to heat. The heating of the black sample causes a pressure wave in... | 01/22/1980 |
| 4175864 | Astigmatic illuminating system in an internal reflection spectometer In a spectrometer, an internal reflectance crystal having opposed internally reflecting surfaces extending between light-entrance and light-exit end surfaces is illuminated by a light source through a slit. The beam of light from the slit is reflected fro... | 11/27/1979 |
| 4146332 | Spectrometer with electronic readout A spectrometer with the basic optical elements is described which scans the spectrum electronically rather than by mechanical manipulation or use of image tubes. The detecting elements are light sensitive charge coupled device detector arrays.... | 03/27/1979 |
| 4105919 | Spectrophone with field tuning of absorption cell The spectrophone, in which a gas containing an impurity in an absorption cell is illuminated by an optical beam that is modulated at an acoustic frequency, has an output pressure response at the acoustic frequency in accordance with the concentration of t... | 08/08/1978 |
| 4094608 | Spectrometer of the electro-opto-acoustic type with capacitor-type detection A spectrometer generally of the electro-opto-acoustic type, using a capacitor type detection instead of acoustic detection. A holder with a sample carrier having a dielectric and with a conducting backing plate on one surface of the sample carrier and a t... | 06/13/1978 |
| 4093991 | Spectrophotometer-digital data processing system for appearance measurements providing fast and accurate standardization, ease of use for different appearance measurements and fast response A combined scanning spectrophotometer-digital data processing system including a microcomputer is described for making appearance measurements. The instrument is comprised by an optical sensing unit and a signal processing unit. The optical sensing unit u... | 06/06/1978 |
| 4084906 | Multigas digital correlation spectrometer A spectrometer for monitoring a gaseous mixture detects one or more component gases of interest by converting the spectrum of the mixture at certain discrete wavelengths to binary numbers which are correlated with a stored series of binary numbers corresp... | 04/18/1978 |
| 4066365 | Temperature control apparatus Control of test chambers or specimens to stabilized temperatures at set points over a wide temperature range is accomplished with improved response time by an arrangement of cascaded Peltier affect heat pumps. Generally, power to a first Peltier unit in t... | 01/03/1978 |
| 4049353 | Spectrometric system and cassette A spectrometric system for multielement analysis and a cassette for use in such system, the cassette having a plurality of aligned and nonaligned channels therethrough, each of which has an inlet and an outlet, the inlets in the focal plane of the spectro... | 09/20/1977 |
| 4018530 | Fluorescence spectrometry employing excitation of bleaching intensity An improved system is desired for examining fluorescent material. The method comprises the steps of illuminating material with radiation at a fluorescent excitation wavelength of said material and at an intensity sufficient to cause bleaching of the mater... | 04/19/1977 |
| 4017185 | Optical arrangements for coupling monochromators with external systems External coupling optics, including a spherical mirror, is located in the beam path between a curved slit and a detector for imaging the slit onto the detector; alternatively, the beam path is between a light source and the slit for imaging the slit onto ... | 04/12/1977 |
| 4012147 | Slit-less spectrometer The use of an optical fiber for providing a point source of radiation at the entrance of a spectrometer obviates the necessity for an entrance slit at the input end of the device. Improved optical imaging at decreased expense is achieved.... | 03/15/1977 |
| 3985442 | Data acquisition system for spectrophotometer A data acquisition system for a spectrophotometer which comprises a pulse providing means for sequentially providing an established number of pulses to the stepping drive means of the spectrophotometer for sequentially moving the spectrophotometer's monoc... | 10/12/1976 |
| 3977786 | Modular optical spectrometer system A modular system for performing optical spectroscopy measurements comprising enclosed modules with ports through which optical beams may pass into and out of the modules. The modules may be joined together with the ports aligned and are interchangeable in... | 08/31/1976 |
| 3930727 | Automatic variable filters for use in scanned spectrometers and the like A spectrometer is scanned across a desired frequency range. A selective filter is automatically varied to alter its characteristics according to the spectrometer's scanning rate by a single control voltage; to assure that the filter's characteristics are ... | 01/06/1976 |
