Abstract:
Apparatus and methods for producing ultrashort optical pulses (1-110) are described. A high-power, solid-state, passively mode- locked laser (1-110) can be manufactured in a compact module that can be incorporated into a portable instrument for biological or chemical analyses. The pulsed laser may produce sub-100-ps optical pulses at a repetition rate commensurate with electronic data- acquisition rates. The optical pulses may excite samples in reaction chambers of the instrument, and be used to generate a reference clock for operating signal-acquisition and signal-processing electronics of the instrument.
Abstract:
A method for downhole fluid analysis by optical spectroscopy with photoacoustic detection includes positioning a photoacoustic system within a wellbore, applying a laser pulse to the fluid sample using the pulsed laser system, detecting, by the acoustic sensor, a time-resolved acoustic pulse generated by absorption of the laser pulse by the fluid sample, and determining a property of the fluid sample using the detected time resolved acoustic pulse. The photoacoustic system includes a pulsed laser system and an acoustic sensor.
Abstract:
A microscopy system includes a microscope apparatus (100,20;200,20:300,20) that has an objective (110) and a correction device (111) correcting for a spherical aberration, and a refractive index calculator (20d) that calculates a refractive index of a sample (S) at a target position in the sample (S) on the basis of a plurality of target set values each of which is a set value of the correction device (111) and each of which corresponds to an amount of spherical aberration that occurs in the microscope apparatus (100,20;200,20:300,20) when an observation target plane is situated at a different position in the sample (S) in an optical-axis direction of the objective (110).
Abstract:
A method and apparatus for optical detection of residual soil on articles (such as medical instruments and equipment), after completion of a washing or a rinsing operation by a washer. A soil detection system provides an indication of soil on the articles by detecting luminescent radiation emanating from the soil in the presence of ambient light.
Abstract:
Methods, analytical devices and analytical systems are provided for determining at least one analyte concentration in a body fluid sample. The methods, which may be incorporated into the devices and systems, can include the following steps: applying a body fluid to a test carrier; illuminating the test carrier by at least one light source, where the at least one light source is modulated by using at least two modulation frequencies; receiving light remitted by the test carrier by using at least one detector; determining an analyte concentration by evaluating at least one detector signal generated by the detector, where the detector signal is demodulated with the at least two modulation frequencies to generate at least two demodulated detector signals, each demodulated signal corresponding to one of the modulation frequencies; and detecting a fault by comparing the at least two demodulated detector signals.
Abstract:
A pump probe measuring device (1) comprises: an ultrashort optical pulse laser generator (2) for generating a first ultrashort optical pulse train which is a pump light (3a), second and third ultrashort optical pulse trains (3b), (3c) which are probe lights; an optical shutter unit (6) to which the second and the third ultrashort pulse trains (3b), (3c) are introduced; and a detecting unit (20) including an irradiation optical system (8) for directing the pump light (3a), the first probe light (3b) and the second probe light (3c) to a sample (7), a sensor (11) for detecting a probe signal from the sample (7), and a phase-sensitive detecting means (12) connected to the sensor (11). An optical shutter control unit (10) periodically modulates the delay time of the first probe light (3b) and that of the second probe light (3c) with respect to the pump light (3a), and the modulated first and second probe lights (3a), (3b) illuminate the sample (7) alternately to detect the probe signals from the sample (7) by the phase-sensitive detecting means (12) in synchronization with the periodic modulation signal of the delay time.
Abstract:
Provided is a measuring apparatus, including: an irradiation unit (101) configured to irradiate an object to be examined (111) with an electromagnetic wave, preferably in a range from 30 GHz to30 THz; a window member (110) configured to be brought into contact with the object to be examined; a sensing unit (102) configured to sense the electromagnetic wave from the object to be examined that is brought into contact with the window member; and a dielectric constant adjusting unit (108) configured to change a dielectric constant of the window member.
Abstract:
The invention encompasses analyzers and analyzer systems that include a single molecule analyzer, methods of using the analyzer and analyzer systems to analyze samples, either for single molecules or for molecular complexes. The single molecule uses electromagnetic radiation that is translated through the sample to detect the presence or absence of a single molecule. The single molecule analyzer provided herein is useful for diagnostics because the analyzer detects single molecules with zero carryover between samples.