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  • 1
    ISSN: 1432-1858
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Technology
    Notes: Abstract  A new laser microstereophotolithography process has been developed in our laboratory to manufacture three-dimensional parts with a high accuracy. As usual in laser stereophotolithography or laser microstereophotolithography, the part is manufactured layer by layer by a light-induced space-resolved polymerization. Until now, in all the already existing microstereophotolithography devices a layer is manufactured vector by vector, by moving the part beneath the initiating light source which remains motionless. We developed a simpler and easier process, in which we can manufacture an entire layer by irradiating its whole surface only once: we used a liquid crystal display as a dynamic generator of masks. In the device we set up, we need only one mobile element, the z translator, all the others are fixed. We manufactured several different 3D microparts, in particular a piece of bevel microgearing with helicoidal cogs, the volume of which is less than half a cubic millimetre.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Microsystem technologies 2 (1996), S. 97-102 
    ISSN: 1432-1858
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Technology
    Notes: Abstract The laser stereophotolithography is a process which allows the manufacture of 3D parts by a light-induced space-resolved polymerization. In view to obtain microparts, it is necessary on one hand to reduce the polymerization depth and on the other hand the polymerization width in thex-y plane. The addition of an unreactive highly absorbing chemical succeeded in a significant reduction of the polymerization depth (8 to 10 times thinner). We studied the influences of the light flux, of the initiator and the absorbing unreactive chemical concentrations. The experimental data are in good agreement with the theoretical model. The narrowing of the width is disappointing except with one resin. These results nevertheless led us to set up a new apparatus to reduce the beam diameter by a factor of ten. Despite the increase of the light flux, some of the first results are promising.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Microsystem technologies 2 (1996), S. 97-102 
    ISSN: 1432-1858
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Technology
    Notes: Abstract  The laser stereophotolithography is a process which allows the manufacture of 3D parts by a light-induced space-resolved polymerization. In view to obtain microparts, it is necessary on one hand to reduce the polymerization depth and on the other hand the polymerization width in the x-y plane. The addition of an unreactive highly absorbing chemical succeeded in a significant reduction of the polymerization depth (8 to 10 times thinner). We studied the influences of the light flux, of the initiator and the absorbing unreactive chemical concentrations. The experimental data are in good agreement with the theoretical model. The narrowing of the width is disappointing except with one resin. These results nevertheless led us to set up a new apparatus to reduce the beam diameter by a factor of ten. Despite the increase of the light flux, some of the first results are promising.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
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