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Volume 10, Issue 2
Displaying 1-13 of 13 articles from this issue
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Seiji OHARA1982 Volume 10 Issue 2 Pages 147
Published: March 30, 1982
Released on J-STAGE: February 26, 2010
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Yutaka TSUCHIYA1982 Volume 10 Issue 2 Pages 148-164
Published: March 30, 1982
Released on J-STAGE: February 26, 2010
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Daisuke KATO1982 Volume 10 Issue 2 Pages 165-172
Published: March 30, 1982
Released on J-STAGE: February 26, 2010
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Toshiyuki OHYAMA, Shigeyoshi ARAI1982 Volume 10 Issue 2 Pages 173-184
Published: March 30, 1982
Released on J-STAGE: February 26, 2010
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Yoshiro SUEMOTO1982 Volume 10 Issue 2 Pages 185-188
Published: March 30, 1982
Released on J-STAGE: February 26, 2010
JOURNAL FREE ACCESSA scanning laser heterodyne system, in which a laser probe beam scanned over the surface of a test piece with use of a scanning mirror, is described. This system assured production of a heterodyne signal corresponding to the scanning speed and the tilt of a high quality mirror surface used as a test piece. With this system, profile difference between the surfaces of the mirror and a block gauge was measured.View full abstractDownload PDF (408K) -
Haruhiko NAGAI, Hisao YOSHIDA, Masao HISHII, Kunihisa WAKABAYASHI, Yas ...1982 Volume 10 Issue 2 Pages 189-199
Published: March 30, 1982
Released on J-STAGE: February 26, 2010
JOURNAL FREE ACCESSA high-pressure, sealed cw CO2 laser with a maximum power of 8.7 kW (14.5% efficiency) has been developed. An unstable resonator was used fort hepower extraction from the discharge region with length in 2.9m and gap length in 40mm. The longterm stability test at a power of 7.6kW showed that the stability of the unstable resonator with a simple structure of invar spacer is useful for practical uses. The dependences of optical power on the gas pressure, internal diameter of coupling mirror, and location of optical axis are investigated in detail. The output annular beampattern was improved without a substantial decrease in optical power by the insertion of an intracavity aperture with a diameter slightly smaller than the discharge gap length.
A stable resonator was also tried under the same gas condition to compare with the performance of the unstable resonator. A higher efficiency of 18% was obtained at anoptical power of 6 kW, which was limited by the optical damage of the partial reflector.View full abstractDownload PDF (1583K) -
Yoshizumi YASUOKA, Kenichi HARAKAWA1982 Volume 10 Issue 2 Pages 200-207
Published: March 30, 1982
Released on J-STAGE: February 26, 2010
JOURNAL FREE ACCESSA point-contact infrared detector based on the thermoelectric effect of warm carriers in p-type germanium is fabricated, and its detection properties at RF and infrared regions are studied. A nickel and indium plated thin tungsten whisker is used as a point contact electrode in order tomake the ohmic contact. The static current-voltage characteristics and detection properties at RF signal indicate that the detected signal of the evice is pro.uced by the nonlinear current-voltage characteristics.Antenna patterns at 118μm CH3OH and 10.6μm CO2 lasers support the idea that thed evice works as an antenna coupled detector at the infrared region.View full abstractDownload PDF (835K) -
Fumihiko KANNARI, Shigeru YAMAGUCHI, Makoto SUDA, Minoru OBARA, Tomoo ...1982 Volume 10 Issue 2 Pages 208-213
Published: March 30, 1982
Released on J-STAGE: February 26, 2010
JOURNAL FREE ACCESSPulsed KrF lasers with transverse-electron-beam pumping and magnetic confinementare described. By using a totally-stopping electron-beam calorimeter, we analyzedeffects of external magnetic field (Bz field) on the confinement of the electron beam ina diode and in laser ges mixtures. The Bz field is found effective on the reductionof electron beam loss due to the interception by the Hibachi anode foil support. With Bzfield 4. 4 KG, we could obtain total electron oeam energy twice that without Bz field. The Bz field could greatly reduce the electrons going away from the acive region due to thescattering by gas atoms. With the Bz field, we realized fairly uniform excitation of high-pressure gas mixtures and then obtained a KrF laser output of 6 J/pulse at an intrinsic efficiency of 8%.View full abstractDownload PDF (580K) -
Hitoshi FUJII, Toshimitsu ASAKURA, Toshihiko TSUJI, Toshiaki MATSUMOTO ...1982 Volume 10 Issue 2 Pages 214-218
Published: March 30, 1982
Released on J-STAGE: February 26, 2010
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1982 Volume 10 Issue 2 Pages 219-225
Published: March 30, 1982
Released on J-STAGE: February 26, 2010
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C. M. Verber1982 Volume 10 Issue 2 Pages 226-229
Published: March 30, 1982
Released on J-STAGE: February 26, 2010
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J. Grinberg, W. P. Bleha, P. O. Braatz, U. Efron, N. W. Goodwin, M. J. ...1982 Volume 10 Issue 2 Pages 230-241
Published: March 30, 1982
Released on J-STAGE: February 26, 2010
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1982 Volume 10 Issue 2 Pages 242
Published: March 30, 1982
Released on J-STAGE: February 26, 2010
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