The Review of Laser Engineering
Online ISSN : 1349-6603
Print ISSN : 0387-0200
ISSN-L : 0387-0200
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Volume 29, Issue 7
Displaying 1-13 of 13 articles from this issue
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  • If You Have an Idea, Do It Yourself.
    Wataru SASAKI
    2001 Volume 29 Issue 7 Pages 413
    Published: July 15, 2001
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.29.413
    JOURNAL FREE ACCESS
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  • Preface to the Topical Papers on the Frontier in Ophthalmological Treatment with Laser
    Takashi FUJIKADO
    2001 Volume 29 Issue 7 Pages 414
    Published: July 15, 2001
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.29.414
    JOURNAL FREE ACCESS
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  • Wavefront Aberration Measurements of the Human Eye
    Toshifumi MIHASHI
    2001 Volume 29 Issue 7 Pages 415-420
    Published: July 15, 2001
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.29.415
    JOURNAL FREE ACCESS
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    Wavefront sensing in the human eye recently has been extensively studied, because Liang used a Hartmann-Shack wavefront sensor to successfully measure the aberrations in the human eye. In this article, the basicmethods of a Hartmann-Shack wavefront sensor for the eye and several clinical applications will be described. The benefits of wavefront sensing will be observed in many clinical situations, such as in patients with keratoconusor cataract and in those undergoing intraocular lens implantation or corneal refractive surgery.
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  • [title in Japanese]
    2001 Volume 29 Issue 7 Pages 420-420,432
    Published: July 15, 2001
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.29.420
    JOURNAL FREE ACCESS
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  • Imaging Analysis in Retinal Diseases Using a Scanning Laser Ophthalmoscope.
    Satoshi ISHIKO, Akitoshi YOSHIDA
    2001 Volume 29 Issue 7 Pages 421-426
    Published: July 15, 2001
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.29.421
    JOURNAL FREE ACCESS
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    Scanning laser ophthalmoscope (SLO), as an imaging diagnostic instrument for the retinal disease, is reviewed.SLO can obtain the highly resolution images with the highly contrast compared to the conventionalophthalmoscope by adoptions of a scanning method, laser sources and a confocal system. A lot of new instrumentsfor the specified examination using the principle of the SLO has been developed. Following the introductionof the SLO and some SLO related devices for the clinical examination, the future prospects of SLO arediscussed.
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  • Excimer Laser Refractive Surgery
    Yuichi OHASHI
    2001 Volume 29 Issue 7 Pages 427-432
    Published: July 15, 2001
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.29.427
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    The historical background and the current perspective of excimer laser refractive surgeries were reviewed witha special reference to LASIK (laser in situ keratomileusis) which has attracted great attention as a majorsurgical modality for correcting myopes. LASIK is certainly thought to be the most acceptable keratorefractiveprocedure that has ever been designed, however, several issues including a variety of flap-related complications, decentered ablation, iatrogenic keratectasia, decreased contrast sensitivity due to creating the oblatecornea have remained to be resolved.
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  • Photodynamic Therapy and Transpupillary Thermotherapy for Neovascular Maculopathy
    Atsushi HAYASHI
    2001 Volume 29 Issue 7 Pages 433-437
    Published: July 15, 2001
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.29.433
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  • Change and the Present State of Retinal Photocoagulation
    Akira OBANA
    2001 Volume 29 Issue 7 Pages 438-444
    Published: July 15, 2001
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.29.438
    JOURNAL FREE ACCESS
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    Various kinds of lasers such as argon, krypton, dye, Nd: YAG and diode have been developed since 1963 whenlaser was used as a photocoagulation source for the first time, and laser photocoagulation is an essential therapyin Ophthalmology now. The major chromophore in the ocular fundus is melanin pigments in the retinalpigment epithelium and hemoglobin in the choriocapillaris. Green and orange lasers are used for retinalphotocoagulation in diabetic retinopathy, retinal tear and other retinal diseases. Red laser is useful for treatingcertain conditions such as choroidal neovascularization embedded in subretinal hemorrhage. Slit lamp deliveryis most popular, but indirect ophthalmoscope and transscleral photocoagulation is useful for retinopathy ofprematurity. New technology such as scanning laser ophthalmoscope delivery and selective retinal pigmentepithelial photocoagulation are investigated now. Laser photocoagulation will not be limited to the traditionalthermal destruction of the tissue but become a more sophisticated treatment modality to selectively manage thetarget cells in the retina.
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  • Performance Required of Ophthalmic Therapeutic Laser Systems
    Hirokazu NAKAMURA, Yasuo OTA
    2001 Volume 29 Issue 7 Pages 445-451
    Published: July 15, 2001
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.29.445
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    We considered the performance required of ophthalmic therapeutic laser systems taking the laser photocoagulationsystem as an example. Safety functions and delivery systems have been developed in order to conformto safety standards and deal with the diversification of treatment technique. Besides, the applicability ofsystem has been broadened owing to the introduction of high-efficiency lasers and the optimization of existinglasers. A maximum treatment effect with minimum risk is always required of the surgery, which is achieved bydestroying tissue, such as photocoagulation. We expect a further study of basic themes such as a good grasp ofarea to be treated and a heating condition on tissue under laser emission.
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  • THz-Wave Parametric Generator with Injection Seeding
    Kodo KAWASE, Junichi SHIKATA, Kazuhiro IMAI, Hiromasa ITO
    2001 Volume 29 Issue 7 Pages 452-456
    Published: July 15, 2001
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.29.452
    JOURNAL FREE ACCESS
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    A novel THz-wave parametric generator (TPG) was demonstrated by introducing an injection seeding technique.The linewidth was narrowed to the Fourier transform limit of the pulsewidth, and the purity of thefrequency was dramatically improved to Δv/v′10-4. The resolution of less than 100 MHz (0.003 cm-1) wasclearly shown by the absorption spectrum measurement of low pressure water vapor. The linewidth couldbecome much narrower by using longer pump pulse. Simultaneously, the obtained THz-wave output wasmore than 300 times higher than that of conventional TPG which has no injection seeder, and about 5 timeshigher than that of TPO.
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  • High-Efficiency Flashlamp-Pumped Dye Laser at Low Output Energy
    Akihiro YAMAMURA, Tetsuo KANO, Haruo UCHIYAMA, Masanori JYUMONJI
    2001 Volume 29 Issue 7 Pages 457-462
    Published: July 15, 2001
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.29.457
    JOURNAL FREE ACCESS
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    Organic dye lasers have been widely used for various tunable laser applications, such as high resolution spectroscopy, uranium enrichment, resonance scattering laser radar, and in medicine. Many excitation methods ofdye lasers have been developed in order to realize high efficiency, high energy and good tunability. Amongthem, linear flashlamp-pumped dye lasers are very attractive because of their high output energy, excellenttunability, easy maintenance and low cost. However, the efficiency of the low output energy flashlamp-pumpeddye lasers usually used for spectroscopy is low compared to high-energy versions. We investigated variousmethods of improving the efficiency of linear flashlamp-pumped dye lasers at low output energy, and achieveda significant enhancement in efficiency, more than 5 times that reported previously, by using a close-coupledcavity with a rectangular dye cell and compensating for the thermal distortion of the dye solution duringexcitation.
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  • Holographic Marking of Glass Plate by Internal Periodic Structures
    Kenichi HAYASHI
    2001 Volume 29 Issue 7 Pages 463-466
    Published: July 15, 2001
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.29.463
    JOURNAL FREE ACCESS
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    Inner holographic marking is demonstrated. A Gaussian-like profile LD-pumped Nd: YLF laser has beenemployed to generate the second harmonic (523nm) pulses. When the laser beam is strongly focused insidethe soda lime glass plate, the refractive index of the glass substrate changes slightly and a small bright spotappears inside the plate. The spot is so small that we have to use some microscopes to detect the spot. For thepurpose of the industrial use of this marking method, the visibility to the human eye is the most importantfactor. The periodic structure inside the glass plate made it possible to increase the visibility of the mark andalso the holographic color for the human eye. Inner holographic marking is suitable for the industrial markingprocess for the machine-readable marking and the clean process inside the thin glass substrate without anysurface damages.
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  • Fundamentals of Optical Information Processing III
    Toyohiko YATAGAI
    2001 Volume 29 Issue 7 Pages 467-471
    Published: July 15, 2001
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.29.467
    JOURNAL FREE ACCESS
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