The paper analyses the overall performance parameters, operation principle, and general structure of a double wavelength (1064nm and 532nm) laser device for Laser skin resurfacing and treatment. The instrument uses solid state Laser with the energy ofper pulse 400mJ or 200Mj, the width ofpulse of 8-iOns and the density of light spot of 12. 8J/cm2 or 6.4J/cm2. Discussion is made carefully for the design of solid laser power supply, and fundamental intelligent controlling systems. Reliability and security design is also analyzed particularly.
This paper discusses the basic theory and structure of radiation temperature measurement instrument whose quartz optical fiber bundle couples directly with optic-electronic detector. The paper also presents theoretical analyses and experimental result, and proposes a concrete manner to increase the measurement precision of the instrument
In order to meet the requirement of calculating the binary image centroid quickly in real time signal processing, authors used second generation's DSP TM320C25 (made by TI), gave full play its object image centroid quickly simplified traditional algorithm of centroid calculation and calculated image centroid by combining software and hardware.
This paper discusses a light transfer system of therapeutic machine using carbon-dioxide laser. This system is based on imitating human being arm motion principle, consists of optical cardans mainly and can move in three-D space freely. Through it carbon-dioxide laser (which wavelength is 10.6 micrometer) is reflected, focused or diverged and transferred to the different therapeutic part of body to realize the purpose of cutting operation, gasification, cauterization and irradiation. This system includes an indicating system using He-Ne laser, by which carbon-dioxide laser can arrive therapeutic part accurately. This system possesses some advantages e.g. an accurate transfer, large moving range, small power consumption, high power density and easy operation. At present the occupancy in home market of this kind laser transfer system products is over 95%. Some products have been exported to other countries.
This paper discusses a design of optical transfer system used in carbon-dioxide laser therapeutic machine. The design of this system is according to the requirement of the therapeutic machine. The therapeutic machine requires the movement of laser transfer system is similar to the movement of human beings arms, which possesses 7 rotating hinges. We use optical hinges, which is composed of 45 degree mirrors. Because the carbon-dioxide laser mode is not good, light beam diameter at focus and divergence angle dissemination are big, we use a collecting lens at the transfer system output part in order to make the light beam diameter at focus in 0.2 to approximately 0.3 mm. For whole system the focus off-axis error is less than 0.5 mm, the transfer power consumption is smaller than 10%. The system can move in three dimension space freely and satisfies the therapeutic machine requirement.
This paper studies the LiNbO3 crystal rohomboprism machining problem, introduces how to select material including initial separation and finish separation and determine optical axis, proposes a method to determine material uniformity according to graph of interference fringes and discussed the technology problems of rough lapping, finish lapping and polishing and some problems should be attended to e.g. temperature, spindle rotating speed, abrasives, hanging method and iris controlling and so on. Some methods for measuring rhomboprism and formula for calculating deviation angle are given. The workpiece machined by the machining technology proposed in this paper surface flatness is 0.1 micrometers , roughness is Ra 0.008 micrometers (P equals III), angle error is 1', parallelism error is 15', which can meet the drawing requirements.
This paper introduces the properties of BaF2 crystal material. According to these properties material selecting is discussed including initial separation and finish separation, e.g. checking crystal lithogenesis, intercalation, cloud, uniformity and stress and so on. Determine methods are given also. The BaF2 machining technology is studied. Comparing different cutting methods we select the cutting method with steel saw blade. For the soft and brittle properties of BaF2, we probe the rough lapping finish lapping and polishing and for different procedure give selecting principle for abrasive, spindle rotating speed, machining allowance, size tolerance, and iris and relative data. Through machining experiments we find that the workpieces machined adopting the technology proposed in this paper can meet the drawing requirement e.g. N equals 1, (Delta) N equals 0.1, center thickness d equals 4 +/- 0.10 surface roughness Ra 0.008 micrometers (P equals III). The paper also points out some problems should be attended to in machining BaF2 crystal.
Establishing a new principle of machining spherical optical parts by the locus shaping technique, the study can concentrate the processing procedures, fully use the grinding wheel and wide the field of the processing. Furthermore, the technique can easily guarantee the precision and roughness of the surface, increasing the working efficiency and decreasing the cost.
Objective: to investigate the effect of therapy to local infection using He-Ne laser. Method: we adopt He-Ne laser made in Harbin Laser Institution to irradiate directly infected gluteal surface areas. Result: all cases were cured. Conclusion: He-Ne laser is benefit for infected gluteal muscles.