Abstract:
A first method for determining the relative wavelength shift of a laser beam away from a known reference line, such as an absorption line of a gas in an opto-galvanic cell or a reference line of reference laser uses a monitor etalon. The FSR of the etalon used to calculate the wavelength shift is determined based on a calculated gap spacing between the etalon plates, or etalon constant. The gap spacing is determined based on a fit to measured values of wavelength deviations of the FSR as a function of the relative wavelength shift. The FSR used to calculate the wavelength shift is also based on the wavelength shift itself. A second method for measuring the absolute bandwidth and spectral purity of a tunable laser beam uses an opto-galvanic or absorption cell. The laser beam is directed to interact with a gas in the cell that undergoes an optical transition within the spectral tuning range of the laser. The beam is tuned through the optical transition line of the gas in the cell, and the opto-galvanic or absorption spectrum of the line is measured. The measured bandwidth and spectral purity are convoluted or broadened by the bandwidth of the laser beam used in the measurement. The bandwidth and spectral purity of the laser beam are determined based on the bandwidth and spectral purity, respectively, of the measured spectrum and a known correspondence between the measured convoluted bandwidth and spectral purity and the bandwidth and spectral purity, respectively, of the laser beam.
Abstract:
The invention is directed to a multispectral illumination device for a microscope or for a reader. According to the invention, the illumination device comprises at least three receptacle positions for lighting modules and at least one receptacle position for coupling modules, the mechanical devices for connecting the lighting modules or coupling modules at the receptacle positions to the illumination device being designed in such a way that the lighting modules or coupling modules can be easily changed. Further, the receptacle positions are arranged in such a way that, with suitable selection of the lighting modules and coupling modules, all individual spectra of the lighting modules in a total spectrum are available simultaneously at the output of the illumination device.
Abstract:
The invention is directed to a microscope in which laser light is used to irradiate a sample to be examined and which is outfitted with a protective device for preventing eye damage due to laser light. It is the object of the invention to provide a protective device for microscopes of the type described above which ensures protection against eye damage and visibility of the sample. According to the invention, the protective device has at least one area which is not transparent to harmful radiation components, but which is transparent to harmless, visible radiation components, so that an observer can see the sample through this area without risk of eye damage.
Abstract:
A line narrowing unit for use within an excimer or molecular fluorine laser resonator includes a dispersive prism having antireflection coatings on entrance and exit surfaces. Entrance and exit angles and an apex angle are increased to enhance the dispersive power of the prism, while the antireflective coatings limit reflective losses. Preferably, a laser beam makes a non-symmetric pass through said prism. The apex angle is preferably greater than 65°, or even 75°, and the angle of incidence and the exit angle of the beam are each preferably greater than 65°. A beam expanding prism configured for enhanced beam expansion has an apex angle between within a range of 37.5° and 42.5°, and a beam incidence angle at the entrance surface of more than 65°, and an antireflection coating on preferably both the entrance and exit surfaces.
Abstract:
The invention relates to a lens or lens attachment component, which is designed to be mounted in a microscope and to which an electronic memory module (15) is fixed. Said component comprises two contact fields (16, 17; 18, 19) that are electrically connected to connections of the memory module (15), said fields permitting the memory module (15) to be electrically contacted and supplied with energy once the component is mounted.
Abstract:
The invention is directed to a light microscope with a display which is suitable for use particularly in lecture rooms or dissection rooms. By an integrated, large display of the viewing conditions, e.g., lamp voltage, selected objective, etc., that can be viewed from a distance, the actual state of the adjusted conditions can be determined from any position within a classroom or laboratory room.
Abstract:
The invention is directed to a microscope in which laser light is used to irradiate a sample to be examined and which is outfitted with a protective device for preventing eye damage due to laser light. It is the object of the invention to provide a protective device for microscopes of the type described above which ensures protection against eye damage and visibility of the sample. According to the invention, the protective device has at least one area which is not transparent to harmful radiation components, but which is transparent to harmless, visible radiation components, so that an observer can see the sample through this area without risk of eye damage.
Abstract:
An excimer or molecular fluorine laser system includes a discharge chamber containing a gas mixture, multiple electrodes connected to a power supply circuit for energizing the gas mixture, a resonator for generating a laser beam, a processor, and means for monitoring an amplified spontaneous emission (ASE) signal of the laser, such as preferably an ASE detector. The processor receives a signal from the preferred ASE detector indicative of the ASE signal of the laser. Based on the signal from the ASE detector, the processor determines whether to initiate a responsive action for adjusting a parameter of the laser system.
Abstract:
A device and method are described to determine the concentration of a substance in blood flowing through a blood chamber of a dialyzer during extra corporeal blood treatment. The flow rate of dialysate flowing through the dialysate chamber of the dialyzer is reduced to a value at which the concentration of the substance at the outlet of the dialysate chamber is essentially the same as the concentration of that same substance in the blood at the inlet of the blood chamber. The concentration measurement can be carried out without interrupting the flow of dialysate.
Abstract:
The present invention relates to a process for the preparation of 1,4-butanediol mononitrate as intermediate for large scale preparation of high purity nitrooxybutyl ester of pharmaceutically active compounds.