Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 7046412 | Scanning optical delay line using a reflective element arranged to rotate A method and apparatus delays an optical input using a scanning optical delay line. The scanning optical delay line includes an optical input and an optical output. A reflective element is arranged to rotate about an axis such that the reflective element maintains a... | 05/16/2006 |
| 7001526 | Optical isomer separation method Methods for separation of two optical isomers in a racemate into its constituent isomers by statistical means are described, whereby the saturated racemate solution is first allotted into small samples by means of microfluidic or inkjet techniques to obtain small sa... | 02/21/2006 |
| 6862091 | Illumination device and method for spectroscopic analysis An illumination subsystem for use in optical analysis which provides spatially and angularly homogenized radiation to the sample being analyzed. The system eliminates the illumination system as an interferent in the overall optical analysis. Thus, modest translation... | 03/01/2005 |
| 5751419 | Optical delay apparatus An optical delay apparatus that regularly alternately outputs beams having mutually different delays on one optical axis and that can variably set a delay amount of at least one beam. A motor 112 rotation-drives a rotating plate 111 in which reflective po... | 05/12/1998 |
| 5260574 | Infrared densitometer A high resolution infrared densitometer system is described which comprises an intense thermal light source, an optical system for projecting first and second images of the light source along respective parallel first sample and second reference optical a... | 11/09/1993 |
| 4176958 | Automatic loop gain adjustment for optical null spectrophotometers A double beam, optical null spectrophotometer including means for automatically determining system loop gain requirements and setting the gain to the correct value for optimum response under all operating conditions. With the system ready for operation an... | 12/04/1979 |
| 4169678 | Spectrophotometer A spectrophotometer used for measurement of the transmittance of a sample according to an optical null method, wherein light from a light source is divided into two light beams and pass through a sample cell and reference cell respectively, chopped by a c... | 10/02/1979 |
| 4101219 | Apparatus for calibrating an optical null spectrophotometer A double beam optical null spectrophotometer having sample and reference optical beam paths, a detector common to both paths, and an attenuator feedback loop from the detector for adjusting the position of an optical attenuator in the reference beam path ... | 07/18/1978 |
| 4095896 | Adaptive grating rate control In a double beam, optical-null type infra red spectrophotometer, an optical system including a movable dispersive optical element causes transmission of a spectrum of light in respective beams through an adjustable optical attenuator and through a sample ... | 06/20/1978 |
| 4078198 | Apparatus for repeating the same process Two extreme points of a range within which a movable body is reciprocated, are set by two position setting means provided with variable resistors. The voltage at the sliding contact of a variable resistor coupled to the movable body is always compared wit... | 03/07/1978 |
| 4000946 | Stepper motor tracking accuracy control for spectrophotometers A tracking accuracy control system for a spectrophotometer utilizing stepper motors for controlling the wavelength drive and chart drive system. An exact ratio between the wavelength drive motor and chart drive motor is maintained under variable speed con... | 01/04/1977 |
| 3975099 | Optical null apparatus A correction system is disclosed for double-beam spectrophotometers of the optical nulling type in which a mechanical radiation attenuator is positionally adjusted in the path of the reference beam by means of an error signal proportional to the detected ... | 08/17/1976 |
| 3942893 | Apparatus for monitoring the selection of chart recording and wavelength scanning speeds in a radiant energy analyzer A spectrophotometer system having a first stepper motor driving a wavelength scanning mechanism and a second stepper motor driving a chart recorder, both motors being operative in response to pulses from a system clock. The clock frequency is successively... | 03/09/1976 |
