Abstract:
A portable light source comprises a double shield structure including a lamp box (42) and a case (41) to enclose a deuterium lamp (10) that is likely to be influenced by temperature. Since the deuterium lamp (10) is kept fairly insensitive to the change in temperature of the case (41) that is most affected by ambient temperature, the light source can be used outdoors regardless of the weather and indoors regardless of the influence of the air conditioner. A power supply (44) is arranged between the lamp box (42) and a cooling fan (43) and cooled appropriately to provide stabilized output for the deuterium lamp (10). The double shield structure and stabilized supply cooperate to stabilize the output characteristic of the deuterium lamp (10).
Abstract:
The present invention concerns an LED spectrometer operating without moving parts, according to the sweep principle, and appropriate to serve as a structural component in many kinds of spectroscopic concentration analysers. The design of the invention affords the advantage that, even at its minimum, the optical power of the LED spectrometer of the invention is about fivefold compared with designs of prior art. Furthermore, improvement of the efficiency of the LED radiation source and of that of the optics has brought a multiple augmentation in power to the wavelength spectrum sent out by the radiation source. In the design of the invention, concentrators (6) of non-imaging type are used to collimate the wavelength spectrum emitted by the LEDs (3).
Abstract:
A method and apparatus for in-process transient spectroscopic analysis of a molten metal, wherein a probe (10) containing a pulsed high-power laser (14) producing a pulsed laser beam having a substantially triangular pulse waveshape is immersed in the molten metal and irradiates a representative quantity of the molten metal. The pulsed laser beam vaporizes a portion of the molten metal to produce a plasma plume having an elemental composition representative of the elemental composition of the molten metal. Before the plasma plume reaches thermal equilibrium shortly after termination of the laser pulse, a spectroscopic detector (241) in the probe (10) detects spectral line reversals, during a short first time window. Thereafter, when the afterglow plasma is in thermal equilibrium, a second spectroscopic detector (242) also in the probe (10) performs a second short time duration spectroscopic measurement. A rangefinder (22) measures and controls the distance between the molten metal surface and the pulsed laser (14).
Abstract:
A spectrometer comprises a light detection element provided with a light passing part (21) and a light detection part (22); a support (30) fixed to the light detection element such that a space (S) is formed between the light passing part and the support; a first reflection part (11) provided in the support and configured to reflect light passing through the light passing part in the space; a dispersive part (42) provided in the light detection element and configured to disperse and reflect the light reflected by the first reflection part in the space; and a second reflection part (41) provided in the support and configured to reflect the light dispersed and reflected by the dispersive part to the light detection part in the space.
Abstract:
There is provided a substance detecting device emits first invisible light to the inside and the outside of a detection region of a substance, changes an emitting direction of the first invisible light inside and outside the detection region, receives third invisible light which is passing light of the first invisible light through the reference cell in which a detection target substance is stored, outside of the detection region, and adjusts a temperature of the first invisible light and controls the wavelength of the first invisible light based on the wavelength characteristics of the third invisible light.