公开(公告)号：US4789389A

公开(公告)日：1988-12-06

申请号：US52619

申请日：1987-05-20

申请人： Paul M. Schermerhorn ,  Michael P. Teter ,  Robert V. Vandewoestine

发明人： Paul M. Schermerhorn ,  Michael P. Teter ,  Robert V. Vandewoestine

IPC分类号： G02B6/00 ,  C01B33/18 ,  C03B8/02 ,  C03B19/06 ,  C03B19/10 ,  C03B20/00 ,  C03B37/012 ,  C03B37/014 ,  C03C1/00 ,  C03B37/023 ,  C03B37/016

CPC分类号： C03C1/006 ,  C03B19/06 ,  C03B19/066 ,  C03B19/1065 ,  C03B20/00 ,  C03B37/01282

摘要： A method for producing ultra-high purity, optical quality, glass articles is disclosed which involves: (1) forming a gel from a silicon-containing organic compound, such as, TEOS; (2) drying the gel to produce granules having a mean particle size of less than about 1 millimeter; (3) fully sintering the granules to produce high purity, artificial sand; (4) casting the artificial sand by conventional techniques, such as, slip casting, to form a high density, porous, green body; (5) drying and partially sintering the green body; (6) fully sintering the green body under vacuum; and (7) hot isostatic pressing ("hipping") the green body. The glass articles produced by the process have higher purity, greater homogeneity, and less IR absorption than existing, commercially available, premium quality, fused silica, glass articles. In addition, in accordance with the invention, high purity glass articles of complex shapes can be directly cast, rather than being machined or pressed from sheets of glass, as in the prior art.

公开(公告)号：US5274502A

公开(公告)日：1993-12-28

申请号：US785467

申请日：1991-10-31

申请人： Jefferey A. Demerritt ,  Mark L. Morrell ,  Robert V. Vandewoestine

发明人： Jefferey A. Demerritt ,  Mark L. Morrell ,  Robert V. Vandewoestine

IPC分类号： C03B11/08 ,  G02B7/02

CPC分类号： C03B11/08 ,  C03B11/084 ,  G02B7/02 ,  C03B2215/06 ,  C03B2215/60 ,  C03B2215/79

摘要： Sealed precision optical assemblies are provided by a mold-in-place (MIP) process wherein a glass preform for a lens or other optical element is molded and sealed directly into a one-piece metal support for the element in a single precision molding step. The product is a sealed glass/metal assembly incorporating a non-interlocking mechanical seal, the seal being hermetic yet free of supplemental sealing materials, and the optical axis of the glass element being at a precise predetermined location and in a predetermined alignment relative to one or more reference surfaces on the metal support.