Nippon Sheet Glass Company, Limited

Non Oxide Glass Research and Development Co., Ltd.

Takashi Yamagishi

Junji Nishii

Toshiaki Mizuno

Kazuhiro Doushita

Koji Yokoi

Yukio Noguchi

Yoshikazu Kaite

Ikuo Inagawa

Masayoshi Shimizu

Shozo Morimoto

Junji Nishiii

Paul O McLaughlin

Ryuji Iizuka

Akitaka Momokita

A process for producing flakes of glass. The process is started by applying a solution containing an organic metal compound to a substrate. The solution is dried and peeled from the substrate. The resultant film is sintered. There is also disclosed an apparatus for producing flakes of glass. The apparatus comprises means 2 for applying solution 1 containing an organic metal compound to a substrate 3 taking the form of a loop, means 4 for drying the film created by the solution containing the organic metal compound, and means 5 for collecting flakes obtained by peeling the dried film from the substrate. The substrate forms a circulatory continuous conveyance path which passes through the applying means, the drying means, and the collecting means in succession.

Process for producing flakes of glass

Apparatus for producing flakes of glass

A process for producing a chalcogenide glass fiber which comprises placing a cylindrical chalcogenide glass preform vertically in a cylindrical crucible furnished with a nozzle in its bottom portion, heating the crucible only at vicinity of the nozzle, and continuously drawing the glass into a fiber with the temperature of the crucible at the vicinity of the nozzle being maintained at such a level that the viscosity of the glass is within the range of 10.sup.3 to 10.sup.7.5 poises.

Process for producing chalcogenide glass fiber

The essential surface of the glass body to undergo the ion exchange processing is coated with the porous layer, which is formed by drying and sintering inorganic fluid, containing clay for more than 3 weight %, so as to have the ion exchange carried out through the above porous layer.

Ion exchange processing method of glass

A method for purifying starting materials for chalcogenide glass is disclosed, which comprises contacting chalcogen starting materials at a high temperature with a metal which is more susceptible to oxidation than the chalcogen starting materials to allow the metal to react with oxygen contained as impurity in the chalcogen starting material to form an oxide of the metal, and then removing the metal and the oxide of the metal from the chalcogen starting materials.

Method for purifying starting materials for fabricating chalchogenide

Collimator lens

A chalcogenide glass having the following composition in atomic %:

Chalcogenide glass

A thallium-containing optical glass composition which contains the following oxides in the indicated proportions in mole %:

Thallium-containing optical glass composition

The present invention provides a converging light transmitting glass body whose refractive index gradually changes from its central portion to its surface in a direction transverse to a path of light, said glass body containing at least three cations constituting modifying oxides of the glass, a first and a second cation among said cations showing concentration changes of converse gradients from its central portion toward its peripheral surface, and a third cation showing no substantial concentration change at the central portion of the glass body but showing a substantial continuous concentration charge outwardly thereof toward its peripheral surface. The present invention also provides a process for producing the light transmitting glass body which comprises contacting a glass body containing a modifying oxide of a first cation with an ion source containing the second cation to produce a pre-produced glass body, and then contacting the pre-produced glass body with an ion source containing the third cation, or which comprises contacting a glass body containing a modifying oxide of a first cation with an ion source containing a second cation and a third cation. The converting light transmitting glass body of the present invention has an ideal refractive index distribution.

Growing community of inventors

Osaka, Japan

Takashi Yamagishi