Document (#25008)

Author
Resenhoeft, T.
Title
¬Die Hoffnung ist blau : Neuartige Laserstrahlen könnten die Kapazität von Speichermedien vervielfältigen
Source
Frankfurter Rundschau. Nr.264 vom 13.11.2001, S.27
Year
2001
Abstract
Immer mehr Musikfans heben ihre Lieblingslieder als große Dateien im Computer auf Die Hersteller von Digitalkameras erhöhen laufend die Auflösung der Bilder. Und Videoaufzeichnungen wird es bald in einer Qualität geben, die weit über der heutiger. DVDs liegt. Eine Folge davon ist bei alldem gleich: Es fallen mehr und mehr Daten an. Forscher suchen deshalb nach Wegen, wie sie auf gleichem Raum mehr Informationen unterbringen können. Erfolg versprechen dabei Geräte, die mit blauen Laserstrahlen arbeiten Es ist die kurze Wellenlänge dieses lichte, auf die die Wissenschaftler setzen. Verglichen mit herkömmlichen roten Diodenlasern lassen sich solche Strahlen besser bündeln. Angenehme und gewünschte Folge: Blaue Laser können Informationen dichter beieinander schreiben als rote. Das Konzept klingt einfach; es in die Praxis umzusetzen, ist aber schwierig. Physiker und Materialforscher versuchen seit vielen Jahren, blaue, Laser herzustellen. Zeit scheiterten sie an Materialproblemen. Die größten Fortschritte erzielten japanische Experten Mitte der neunziger Jahre. Und so ist die Nichia Corporation in Tokushima das einzige Unterneh-men, das blaue Laserdioden produziert.

Similar documents (content)

  1. Caglioti, G.: Symmetriebrechung und Wahrnehmung : Beispiele aus der Erfahrungswelt (1983) 0.05 
    0.05233032 = sum of:
  0.05233032 = product of:
    0.436086 = sum of:
      0.111186 = weight(abstract_txt:physiker in 2601) [ClassicSimilarity], result of:
        0.111186 = score(doc=2601,freq=1.0), product of:
          0.1661435 = queryWeight, product of:
            1.0098298 = boost
            8.565973 = idf(docFreq=22, maxDocs=44421)
            0.019206952 = queryNorm
          0.66921663 = fieldWeight in 2601, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            8.565973 = idf(docFreq=22, maxDocs=44421)
            0.078125 = fieldNorm(doc=2601)
      0.03114948 = weight(abstract_txt:können in 2601) [ClassicSimilarity], result of:
        0.03114948 = score(doc=2601,freq=1.0), product of:
          0.08962458 = queryWeight, product of:
            1.0489024 = boost
            4.448705 = idf(docFreq=1411, maxDocs=44421)
            0.019206952 = queryNorm
          0.3475551 = fieldWeight in 2601, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.448705 = idf(docFreq=1411, maxDocs=44421)
            0.078125 = fieldNorm(doc=2601)
      0.29375052 = weight(abstract_txt:laser in 2601) [ClassicSimilarity], result of:
        0.29375052 = score(doc=2601,freq=1.0), product of:
          0.40004826 = queryWeight, product of:
            2.2160404 = boost
            9.398883 = idf(docFreq=9, maxDocs=44421)
            0.019206952 = queryNorm
          0.73428774 = fieldWeight in 2601, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            9.398883 = idf(docFreq=9, maxDocs=44421)
            0.078125 = fieldNorm(doc=2601)
    0.12 = coord(3/25)
  2. cw: ¬Das Straßen-Netz (2002) 0.05 
    0.050631445 = sum of:
  0.050631445 = product of:
    0.4219287 = sum of:
      0.04983917 = weight(abstract_txt:können in 728) [ClassicSimilarity], result of:
        0.04983917 = score(doc=728,freq=1.0), product of:
          0.08962458 = queryWeight, product of:
            1.0489024 = boost
            4.448705 = idf(docFreq=1411, maxDocs=44421)
            0.019206952 = queryNorm
          0.55608815 = fieldWeight in 728, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.448705 = idf(docFreq=1411, maxDocs=44421)
            0.125 = fieldNorm(doc=728)
      0.2429923 = weight(abstract_txt:roten in 728) [ClassicSimilarity], result of:
        0.2429923 = score(doc=728,freq=1.0), product of:
          0.20453374 = queryWeight, product of:
            1.120441 = boost
            9.504243 = idf(docFreq=8, maxDocs=44421)
            0.019206952 = queryNorm
          1.1880304 = fieldWeight in 728, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            9.504243 = idf(docFreq=8, maxDocs=44421)
            0.125 = fieldNorm(doc=728)
      0.12909722 = weight(abstract_txt:mehr in 728) [ClassicSimilarity], result of:
        0.12909722 = score(doc=728,freq=1.0), product of:
          0.2129779 = queryWeight, product of:
            2.2866714 = boost
            4.849225 = idf(docFreq=945, maxDocs=44421)
            0.019206952 = queryNorm
          0.60615313 = fieldWeight in 728, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.849225 = idf(docFreq=945, maxDocs=44421)
            0.125 = fieldNorm(doc=728)
    0.12 = coord(3/25)
  3. Ganslmayer, K.: Per Mausklick zum Wissen der Welt : Chip Test & Technik: Lexika Online vs. Offline (2005) 0.05 
    0.047667358 = sum of:
  0.047667358 = product of:
    0.297921 = sum of:
      0.024919584 = weight(abstract_txt:können in 4996) [ClassicSimilarity], result of:
        0.024919584 = score(doc=4996,freq=1.0), product of:
          0.08962458 = queryWeight, product of:
            1.0489024 = boost
            4.448705 = idf(docFreq=1411, maxDocs=44421)
            0.019206952 = queryNorm
          0.27804407 = fieldWeight in 4996, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.448705 = idf(docFreq=1411, maxDocs=44421)
            0.0625 = fieldNorm(doc=4996)
      0.1007397 = weight(abstract_txt:dvds in 4996) [ClassicSimilarity], result of:
        0.1007397 = score(doc=4996,freq=1.0), product of:
          0.18051933 = queryWeight, product of:
            1.0526121 = boost
            8.928879 = idf(docFreq=15, maxDocs=44421)
            0.019206952 = queryNorm
          0.5580549 = fieldWeight in 4996, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            8.928879 = idf(docFreq=15, maxDocs=44421)
            0.0625 = fieldNorm(doc=4996)
      0.060460225 = weight(abstract_txt:informationen in 4996) [ClassicSimilarity], result of:
        0.060460225 = score(doc=4996,freq=3.0), product of:
          0.112203404 = queryWeight, product of:
            1.1736119 = boost
            4.9776354 = idf(docFreq=831, maxDocs=44421)
            0.019206952 = queryNorm
          0.5388448 = fieldWeight in 4996, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            4.9776354 = idf(docFreq=831, maxDocs=44421)
            0.0625 = fieldNorm(doc=4996)
      0.111801475 = weight(abstract_txt:mehr in 4996) [ClassicSimilarity], result of:
        0.111801475 = score(doc=4996,freq=3.0), product of:
          0.2129779 = queryWeight, product of:
            2.2866714 = boost
            4.849225 = idf(docFreq=945, maxDocs=44421)
            0.019206952 = queryNorm
          0.524944 = fieldWeight in 4996, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            4.849225 = idf(docFreq=945, maxDocs=44421)
            0.0625 = fieldNorm(doc=4996)
    0.16 = coord(4/25)
  4. Dittmann, J.; Janovsky, P.; Steinmetz, A.: Objektverfolgung und Szenenerkennung in Video auf Basis von Kantendetektion (1998) 0.04 
    0.041905165 = sum of:
  0.041905165 = product of:
    0.26190728 = sum of:
      0.037379377 = weight(abstract_txt:können in 1021) [ClassicSimilarity], result of:
        0.037379377 = score(doc=1021,freq=4.0), product of:
          0.08962458 = queryWeight, product of:
            1.0489024 = boost
            4.448705 = idf(docFreq=1411, maxDocs=44421)
            0.019206952 = queryNorm
          0.4170661 = fieldWeight in 1021, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            4.448705 = idf(docFreq=1411, maxDocs=44421)
            0.046875 = fieldNorm(doc=1021)
      0.10685058 = weight(abstract_txt:dvds in 1021) [ClassicSimilarity], result of:
        0.10685058 = score(doc=1021,freq=2.0), product of:
          0.18051933 = queryWeight, product of:
            1.0526121 = boost
            8.928879 = idf(docFreq=15, maxDocs=44421)
            0.019206952 = queryNorm
          0.5919066 = fieldWeight in 1021, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            8.928879 = idf(docFreq=15, maxDocs=44421)
            0.046875 = fieldNorm(doc=1021)
      0.06926589 = weight(abstract_txt:informationen in 1021) [ClassicSimilarity], result of:
        0.06926589 = score(doc=1021,freq=7.0), product of:
          0.112203404 = queryWeight, product of:
            1.1736119 = boost
            4.9776354 = idf(docFreq=831, maxDocs=44421)
            0.019206952 = queryNorm
          0.6173243 = fieldWeight in 1021, product of:
            2.6457512 = tf(freq=7.0), with freq of:
              7.0 = termFreq=7.0
            4.9776354 = idf(docFreq=831, maxDocs=44421)
            0.046875 = fieldNorm(doc=1021)
      0.04841146 = weight(abstract_txt:mehr in 1021) [ClassicSimilarity], result of:
        0.04841146 = score(doc=1021,freq=1.0), product of:
          0.2129779 = queryWeight, product of:
            2.2866714 = boost
            4.849225 = idf(docFreq=945, maxDocs=44421)
            0.019206952 = queryNorm
          0.22730742 = fieldWeight in 1021, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.849225 = idf(docFreq=945, maxDocs=44421)
            0.046875 = fieldNorm(doc=1021)
    0.16 = coord(4/25)
  5. Zey, R.; Bitterlich, A.; Ullrich, C.: Neue Medien : Informations- und Unterhaltungselektronik von A bis Z (1995) 0.04 
    0.04176831 = sum of:
  0.04176831 = product of:
    0.34806925 = sum of:
      0.12337706 = weight(abstract_txt:heutiger in 1713) [ClassicSimilarity], result of:
        0.12337706 = score(doc=1713,freq=1.0), product of:
          0.17807634 = queryWeight, product of:
            1.0454652 = boost
            8.868255 = idf(docFreq=16, maxDocs=44421)
            0.019206952 = queryNorm
          0.6928324 = fieldWeight in 1713, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            8.868255 = idf(docFreq=16, maxDocs=44421)
            0.078125 = fieldNorm(doc=1713)
      0.14400642 = weight(abstract_txt:folge in 1713) [ClassicSimilarity], result of:
        0.14400642 = score(doc=1713,freq=1.0), product of:
          0.24872217 = queryWeight, product of:
            1.7473453 = boost
            7.4110084 = idf(docFreq=72, maxDocs=44421)
            0.019206952 = queryNorm
          0.57898504 = fieldWeight in 1713, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            7.4110084 = idf(docFreq=72, maxDocs=44421)
            0.078125 = fieldNorm(doc=1713)
      0.08068576 = weight(abstract_txt:mehr in 1713) [ClassicSimilarity], result of:
        0.08068576 = score(doc=1713,freq=1.0), product of:
          0.2129779 = queryWeight, product of:
            2.2866714 = boost
            4.849225 = idf(docFreq=945, maxDocs=44421)
            0.019206952 = queryNorm
          0.3788457 = fieldWeight in 1713, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.849225 = idf(docFreq=945, maxDocs=44421)
            0.078125 = fieldNorm(doc=1713)
    0.12 = coord(3/25)