Patents by Inventor Norbert Meinert

Norbert Meinert has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5068209
    Abstract: An optical fluorophosphate glass with an anomalous positive incremental dispersion +.DELTA..nu..sub.e between 11.8 and 12.5, a refractive index n.sub.e between 1.53 and 1.55 and an Abbe coefficient .nu..sub.e between 72.8 and 73.5 has the following atomic composition (in atom %): Mg: 2.0-3.5, Ca: 2.5-4.5, Sr: 13.0-16.0, Ba: 22.0-25.0, Al: 4.5-6.0, K: 0.1-0.3, P: 9.0-12.0, O: 17.0-20.0 and F: 20.0-23.0, the F/P ratio lying between 1.8 and 2.4 and the sum of the alkaline earths between 39.5 and 49. The new glasses are melted from a material having the following initial composition (in wt. %): Ca(PO.sub.3).sub.2 : 1.0-2.5, Ba(PO.sub.3).sub.2 : 23.0-25.5, Al(PO.sub.3).sub.3 : 12.0-14.5, MgF.sub.2 : 6.5-8.5, CaF.sub.2 : 5.5-8.0, SrF.sub.2 : 16.0-19.0, AlF.sub.3 : 10.0-12.5, SrO: 2.0-3.0, BaO: 12.5-14.5 and K.sub.2 TiF.sub.6 : 0.2-0.7, the alkaline earth fluorides content lying between 28.0 and 35.5 and the total content of all fluorides used between 38.2 and 48.7.
    Type: Grant
    Filed: April 10, 1990
    Date of Patent: November 26, 1991
    Assignee: Wild Leitz GmbH
    Inventors: Norbert Meinert, Dieter Gelzenleuchter, Henning Franek
  • Patent number: 4941907
    Abstract: Optical fluorophosphate glass which is based on Mg(PO.sub.3).sub.2, Ca(PO.sub.3).sub.2, Ba(PO.sub.3).sub.2, Al(PO.sub.3).sub.3, MgF.sub.2, CaF.sub.2, SrF.sub.2, AlF.sub.3, BaO and SrO and has a refractive index n.sub.e between 1.515 and 1.546, an Abbe value .nu..sub.e between 75.8 and 77.4 and a positive anomalous partial dispersion value .DELTA..nu..sub.e between 14.85 and 15.15.The glass comprises (in weight-%) 2.4-2.7 Mg; 4.5-4.9 Ca; 15.9-17.6 Sr; 20.2-22.3 Ba; 5.6-6.2 Al; 8.8-9.7 P; 22.0-24.3 F and 15.7-17.4 O. The improved physico-chemical parameters, such as linear expansion coefficient, glass transition temperature T.sub.g, density .zeta., Knoop-hardness HK, etc., are stated. Finally, a production process for this optical glass is described.
    Type: Grant
    Filed: July 5, 1989
    Date of Patent: July 17, 1990
    Assignee: Wild Leitz GmbH
    Inventors: Norbert Meinert, Werner Huber, Rainer Dreuth, Henning Franek
  • Patent number: 4915721
    Abstract: Optical fluorophosphate glasses based on Ba(PO.sub.3).sub.2, Al(PO.sub.3).sub.3, alkaline earth metal fluorides and AlF.sub.3 are described which have a refractive index n.sub.e between 1.47 and 1.50, an Abbe-value .nu..sub.e between 85 and 80 and a positive anomalous partial dispersion value .DELTA..nu..sub.e between +17 and +22. They comprise (in wt.-%) 0.5-3 Mg, 8-10 Ca, 12-20 Sr, 9-12 Ba, 7-9 Al, 5-9 P, 8-12 O and 35-38 F. Ti, Na, K and H may additionally be present. The improved physico-chemical parameters (expansion coefficient, glass transition temperature, density, Knoop-hardness) and the transmission characteristics are given, and a process for producing these optical glasses is described.
    Type: Grant
    Filed: July 5, 1989
    Date of Patent: April 10, 1990
    Assignee: Ernst Leitz Wetzlar GmbH
    Inventors: Heinz Broemer, Werner Huber, Norbert Meinert
  • Patent number: 4859635
    Abstract: Optical fluorophosphate glass which is based on Mg(PO.sub.3).sub.2, Ca(PO.sub.3).sub.2, Ba(PO.sub.3).sub.2, Al(PO.sub.3).sub.3, MgF.sub.2, CaF.sub.2, SrF.sub.2, AlF.sub.3, BaO and SrO and has a refractive index n.sub.e between 1.515 and 1.546, an Abbe value .nu..sub.e between 75.8 and 77.4 and a positive anomalous partial dispersion value .DELTA..nu..sub.e between 14.85 and 15.15.The glass comprises (in weight-%) 2.4-2.7 Mg; 4.5-4.9 Ca; 15.9-17.6 Sr; 20.2-22.3 Ba; 5.6-6.2 Al; 8.8-9.7 P; 22.0-24.3 F and 15.7-17.4 O. The improved physico-chemical parameters, such as linear expansion coefficient, glass transition temperature T.sub.g, density .zeta., Knoop-hardness HK, etc., are stated. Finally, a production process for this optical glass is described.
    Type: Grant
    Filed: November 8, 1988
    Date of Patent: August 22, 1989
    Assignee: Ernst Leitz Wetzlar GmbH
    Inventors: Norbert Meinert, Werner Huber, Rainer Dreuth, Henning Franek
  • Patent number: 4857487
    Abstract: Optical fluorophosphate glasses based on Ba(PO.sub.3).sub.2, Al(PO.sub.3).sub.3, alkaline earth metal fluorides and AlF.sub.3 are described which have a refactive index n.sub.e between 1.47 and 1.50, an Abbe-value .nu..sub.e between 85 and 80 and a positive anomalous partial dispersion value .DELTA..nu..sub.e between +17 and +22. They comprise (in wt.-%) 0.5-3 Mg, 8-10 Ca, 12-20 Sr, 9-12 Ba, 7-9 Al, 5-9 P, 8-12 O and 35-38 F. Ti, Na, K and H may additionally be present. The improved physico-chemical parameters (expansion coefficient, glass transition temperature, density, Knoop-hardness) and the transmission characteristics are given, and a process for producing these optical glasses is described.
    Type: Grant
    Filed: November 8, 1988
    Date of Patent: August 15, 1989
    Assignee: Ernst Leitz Wetzlar GmbH
    Inventors: Heinz Broemer, Werner Huber, Norbert Meinert
  • Patent number: 4363879
    Abstract: Fluorophosphate glass free of beryllium with a refractive index n.sub.e between 1.40 and 1.46, an Abbe value v.sub.e between 85 and 94 and a high positive anomalous partial dispersion value +.DELTA.v.sub.e between 19 and 28 is described. The glass is melted from a mixture containing as groups of components metaphosphate, fluorides and an alkali fluoroborate in certain proportions expressed in % by weight, in the following manner: the intermixed mixtue is heated to a temperature between 800.degree. and 800.degree. C., the melt refined at a temperature between 900.degree. and 1000.degree. C. for a period of 8 and 25 minutes, homogenized at a temperature between 900.degree. and 1000.degree. C. within a period of time of 5 to 15 minutes, the temperature reduced to a pouring temperature between 575.degree. and 650.degree. C. and the melt poured into casting molds preheated to approximately 320.degree. C., in particular aluminum molds.
    Type: Grant
    Filed: August 20, 1980
    Date of Patent: December 14, 1982
    Assignee: Ernst Leitz Wetzlar GmbH
    Inventors: Heinz Broemer, Norbert Meinert
  • Patent number: 4200467
    Abstract: Disclosed are zirconium-containing borosilicate glass compositions having a refractive index n.sub.e between 1.55 and 1.72, and Abbe number .nu..sub.e between 50 and 34 and a negative anomalous partial dispersion value .DELTA..nu..sub.e between -3.0 and -7.7. Also disclosed is a process for the production of such glass compositions.
    Type: Grant
    Filed: June 28, 1978
    Date of Patent: April 29, 1980
    Assignee: Ernst Leitz Wetzlar GmbH
    Inventors: Heinz Broemer, Werner Huber, Norbert Meinert
  • Patent number: 4040846
    Abstract: A fluorophosphate glass of a high positive anomalous partial dispersion .DELTA..nu..sub.e within the range of from about +10.0 to about +21.0, a relatively high index of refraction n.sub.e within the range of from about 1.47 to about 1.54, and an Abbe number .nu..sub.e within the range of from about 84.1 to about 51.0 is provided. A simple process of melting such a glass is disclosed.
    Type: Grant
    Filed: March 17, 1976
    Date of Patent: August 9, 1977
    Assignee: Ernst Leitz G.m.b.H.
    Inventors: Heinz Broemer, Norbert Meinert
  • Patent number: 3960579
    Abstract: Optical silicate glasses containing titanium dioxide and having a high index of refraction and high dispersion are composed of1 % to 10 %, by weight, of silicon dioxide SiO.sub.2,30 % to 50 %, by weight, of barium oxide BaO,18 % to 24 %, by weight, aluminum oxide Al.sub.2 O.sub.3, and21 % to 30 %, by weight, of titanium dioxide TiO.sub.2.In such glasses the barium oxide can be replaced partially by sodium oxide Na.sub.2 O, beryllium oxide BeO, calcium oxide CaO, strontium oxide SrO, cadmium oxide CdO, gadolinium oxide Ga.sub.2 O.sub.3, indium oxide In.sub.2 O.sub.3, or yttrium oxide Y.sub.2 O.sub.3. Likewise, the silicon dioxide therein can be replaced partially by boron trioxide B.sub.2 O.sub.3, lead monoxide PbO, germanium dioxide GeO.sub.2, stannic oxide SnO.sub.2, zirconium oxide ZrO.sub.2, hafnium oxide HfO.sub.2, or thorium oxide ThO.sub.2.
    Type: Grant
    Filed: April 9, 1975
    Date of Patent: June 1, 1976
    Assignee: Ernst Leitz GmbH, Optische Werke
    Inventors: Heinz Broemer, Norbert Meinert, Johann Spincic
  • Patent number: 3954484
    Abstract: A fluorophosphate glass which has an index of refraction n.sub.e of more than 1.57, an Abbe number .nu..sub.e of less than 70, and a relatively high positive anomalous partial dispersion +.DELTA..nu..sub.e is provided.
    Type: Grant
    Filed: August 22, 1974
    Date of Patent: May 4, 1976
    Assignee: Ernst Leitz G.m.b.H.
    Inventors: Heinz Broemer, Norbert Meinert