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Volume 13, Issue 10
Displaying 1-8 of 8 articles from this issue
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Masahiio YOKOYAMA1985 Volume 13 Issue 10 Pages 763
Published: October 28, 1985
Released on J-STAGE: February 26, 2010
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Yukio FUKUDA, Tuneo HASHI1985 Volume 13 Issue 10 Pages 764-779
Published: October 28, 1985
Released on J-STAGE: February 26, 2010
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Hitoshi WAKATA, Syuji OGAWA, Kazuki KUBA, Masaaki TANAKA1985 Volume 13 Issue 10 Pages 780-787
Published: October 28, 1985
Released on J-STAGE: February 26, 2010
JOURNAL FREE ACCESSThe accuracy of the acrylic burn pattern method, widely used for observing a beam intensity profile of high power CO2 laser, has been studied by comparing the burn patterns with corresponding beam intensity profiles measured by the computer controlled pinhole scan method. It is found that the shape of burn pattern is determined by beam irradiation time, beam intensity and beam size, owing to the differences in reflectivity at various incident angles and in threshold energy for evaporation of acrylic piastics. Thcs, it is considered that the acrylic burn pattern method is not reliable and that a more accurate method, such as the pinhole scanning method, must be used for studying precise beam qualities.View full abstractDownload PDF (1056K) -
Masahiro UEDA, Kiichiro KAGAWA1985 Volume 13 Issue 10 Pages 788-792
Published: October 28, 1985
Released on J-STAGE: February 26, 2010
JOURNAL FREE ACCESSA clinical experiment on the treatment of tinea pedis infections (common as an athlete's foot) was conducted using a pulsed Nd-YAG laser with an output energy of O.5 joule/pulse and pulse duration of 1 miliisecond. The experlment was supported by 13 volunteers for skin samples used in this experiment. The treatment was performed with the following irradiation condition; an energy density of 400 joulecm2 at a skin sample surface, a spotdiameter of the laser beam on the surface of 0.4 mm and a repetition rate of laser pulse shots of 3 Hz . It was shown that the laser treatment was very effective even when a horney layer was thickly cornified by serious tinea pedis; about half of the volunteers were healed with a cure rate of about 70% and, among others, two were cured completely.View full abstractDownload PDF (469K) -
Yoich UEHARA, Etsuo FUJIWARA, Shouzaburo KASAI, Kazuki TSUCHIDA, Watar ...1985 Volume 13 Issue 10 Pages 793-804
Published: October 28, 1985
Released on J-STAGE: July 30, 2010
JOURNAL FREE ACCESSA procedure for designing an elcctron-beam pumped argon excimer laser is given. Following this procedure, a high power frequency-tunable argon excimer laser has been designed. Experimental data of the argon excimer laser thus designed are compared with our design values. It is proven that the design procedure gives reliable performance prediction. The possibility of high repetition operation of an argon excimer laser is also discussed.View full abstractDownload PDF (1193K) -
Kenichi UEDA, Hajime NISHIOKA, Hirohiko HISANO, Takesi KAMINAGA, Hiros ...1985 Volume 13 Issue 10 Pages 805-813
Published: October 28, 1985
Released on J-STAGE: February 26, 2010
JOURNAL FREE ACCESSThe Faraday rotator which is transparent over ultra-violet wavelength region has been developed. At the wavelength of a Kr F laser the Verdet constants of Si O2, H2O and Na Cl are larger than the typical value of a Faraday glass for a glass laser system. A new technique to generate a repetetive pulse train has been demonstrated as an application of the UV Faraday rotator on the Kr F laser technology. An edemo-beam pumped Kr F laser with an intrademo-cavity Faraday rotator has produced an output with alternative polarization whose period is equal to the cavity round trip time by the injection of a short pulse polarized beam. The output was separated into a couple of polarized pulse trains by an external polarizer, when the pulse duration of the injection pulse was shorter than the cavity round trip time of l2ns. The pulse separation was 24ns and the typical pulse durationwas 12ns.View full abstractDownload PDF (1229K) -
Kenzo MIYAZAKI, Toshifumi HASAMA, Kawakatsu YAMADA, Takuzo SATO, Takas ...1985 Volume 13 Issue 10 Pages 814-822
Published: October 28, 1985
Released on J-STAGE: February 26, 2010
JOURNAL FREE ACCESSThe typical operating characteristics of a compact capacitor-transfer-type discharge-pumped excimer laser are experimentally studied to improve the laser efficiency.The highest overall emciencies recorded with Xe Cl, Kr F and Ar F lasers were 2.9%, 2.8% and 1.3%, respectively, which have been achieved by operating at relatively low charging voltages for high-pressure gas mixtures. The efficient Xe Cl laser cocld generate an average power of 16 W with an average efficiency of 2.1% at a repetition rate of 80 Hz.View full abstractDownload PDF (861K) -
Yo ICHIKAWA, Yoshiaki TSUNAWAKI, Masanobu YAMANAKA, Tatsuhiko YAMANAKA1985 Volume 13 Issue 10 Pages 823-827
Published: October 28, 1985
Released on J-STAGE: February 26, 2010
JOURNAL FREE ACCESSDownload PDF (479K)
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