A synthetic quartz glass for optical use, to be used by irradiation with light within a range of from the ultraviolet region to the vacuum ultraviolet region, which contains fluorine, which has a ratio of the scattering peak intensity of 2250 cm.sup.-1 (I.sub.2250) to the scattering peak intensity of 800 cm.sup.-1 (I.sub.800), i.e. I.sub.2250 /I.sub.800, of at most 1.times.10.sup.-4 in the laser Raman spectrum, and which has an absorption coefficient of light of 245 nm of at most 2.times.10.sup.-3 cm.sup.-1.

Синтетическое стекло кварца для оптически пользы, быть использованным облучением с светом внутри ряд от ультрафиолетов зоны к зоне вакуума ультрафиолетов, которая содержат фтор, которая имеет коэффициент интенсивности разбрасывать пиковой 2250 cm.sup.-1 (I.sub.2250) к интенсивности разбрасывать пиковой 800 cm.sup.-1 (I.sub.800), т.е. I.sub.2250 /I.sub.800, на большинств 1.times.10.sup.-4 в спектре лазера raman, и который имеет коэффициент абсорбциы света 245 nm из на большинств 2.times.10.sup.-3 cm.sup.-1.

 
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