Abstract:
A filter unit (10) for filtering light comprising a first mask (3) with first cavities, a prism unit (7) and a second mask (8) with second cavities. The prism unit (7) is located between the two masks (3, 8), the first (3) and the second mask (8) having corresponding first and second cavities, which form cavity pairs. At least one second cavity in the second mask (8) is provided for each first cavity in the first mask (3). In addition, one prism is provided in the prism unit (7) for at least one pair of cavities. This produces an accurate, narrow-band filter unit. An assembly comprising the filter unit and a device for capturing images are also disclosed.
Abstract:
The invention relates to an optical arrangement for transmitting a structure from a mask (4), and for the corresponding irradiation of a substrate (7). Said optical arrangement comprises a region for expanding a light beam (13) upstream of the mask (4), and a region for converging the light (15) downstream of the mask (4). The light beam can be expanded upstream of the mask both by means of a lens arrangement (2, 3) and by means of an optical mirror element (31, 32, 33, 51, 52, 53), and the beam of rays can be converged or combined analogously by means of a lens arrangement (5, 6) or an optical mirror element (37, 38, 39, 59). A laser source can be used as a light source (1), and a slide or a shutter can be used as the mask.
Abstract:
A laser arrangement exhibits a laser rod or a laser tube (3) as well as a high-voltage connection (19) for generating the laser beam. This laser arrangement has, in addition to the high-voltage connection, at least one electromagnetic radiation source (25) in the region of the laser rod or laser tube, which is provided for initiating the laser. The laser exhibits the special function that it can be initiated by means of additional radiation source. Essential features are: initiation by action of external electromagnetic radiation source, for example light, x-rays, microwaves or other electromagnetic waves. What is more, the laser exhibits the special feature that in the case of a so-called mixed-light, white-light or mixed-frequency laser or maser, what is emitted in the emission of the laser or also maser is not the full spectrum but only the radiation excited by the additional radiation source. Thus it is now possible, without external mechanisms or special optics, to emit and to change only a quite definite wavelength.
Abstract:
A method for determining clinical and/or chemical parameters (S1) in a medium (10), utilizing a laser unit, for emitting coherent light waves (6) and a phototransistor unit, for receiving light waves (8). At least some of the emitted light waves (6) are transferred to the medium (10) and the phototransistor unit waves (8) measures at least some of the light waves (8) that are reflected in the medium (10), the parameters (S1) being determined as a result of the characteristics of the emitted and received light waves (6; 8). The fact that light waves (6) are emitted into the medium (10) by a laser unit (2) and that the light waves (8) that are reflected in the medium (10) are measured by a phototransistor (4) enables the parameters (S1) that occur in the target area of the laser beam to be determined advantageously in a processing and control unit.
Abstract:
A device with a cavity resonator comprises a housing (3, 4, 12) made of electrically conductive material. A reflector unit (11), a microwave unit (9) and a partially reflecting reflector unit (5) are provided inside the housing (3, 4, 12), the housing (4) having a radiation opening (13). The reflector unit (11), the microwave unit (9), the partially reflecting reflector unit (5) and the radiation opening (13) are situated on a radiation axis (14), the microwave unit (9) being placed between the reflector units (5, 11). In addition, a distance between the reflector unit (11) and the partially reflecting reflector unit (5) corresponds to half a wavelength to be generated or to be detected or to several times this half wavelength. At the same time, a measurement transversal to the radiation axis (14) is at least one fourth of the wavelength.
Abstract:
A light unit for generating light rays with differing wavelengths is disclosed. The light unit has a light source unit (34), a mirror unit (80), a carrier unit (30), an output window (50) comprising an opening (60) and a pressure generation unit (12). The light source unit (34) and the pressure generation element (32) are contained in the carrier unit (30), which has a longitudinal axis (40) that runs substantially parallel to the generated light rays and the mirror unit (80) and the output window (50) are located at opposite ends of the carrier unit (30). In addition, the pressure generation unit (32) generates a force that acts on the light source unit (34). The mirror unit (80) and/or the output window (50) can be displaced in relation to the carrier unit (30) and/or tilted in relation to the longitudinal axis (40) by at least one displacement element (52, . . . , 56), in conjunction with the force that is exerted on the light source unit (34) by the pressure generation element (32). This permits the wavelength of the light rays to be adjusted over a wide range.