Jayson J Nelson, Age 664524 N Avenida Ronca, Tucson, AZ 85750

6363747, Apr 2, 2002

May 12, 2000

09/570564

Michael K. Budinski - Pittsford NY
John C. Pulver - Spencerport NY
Jayson J. Nelson - Webster NY
Eugene G. Hill - Rochester NY
David A. Richards - Rochester NY

Eastman Kodak Company - Rochester NY

C03B 1100

65 26, 65 37, 65102, 65106, 65 337, 65169, 65286, 65305, 6537413

A method for making working mold tools for use in a compression molding process for molding optical glass elements from high temperature glasses having T s in the range of from about 400Â C. to about 850Â C. An yttria aluminosilicate glass is fabricated by traditional melting and casting processes to thereby make an amorphous base material having a minimum apparent viscosity of 10 poise at the temperature at which the optical glass elements are to be molded. A mold preform is made from the base material. A first surface figure for the optical element to be molded with the working mold tool is defined. A second surface figure for a master mold tool and a third surface figure for the working mold tool are computed based upon the first surface figure and the coefficients of thermal expansion of the optical element, the master mold tool, and the working mold tool, the temperature at which the working mold tool is molded, and the temperature at which the optical element is to be molded. A master mold tool is then ground and polished to achieve the second surface figure. The working mold tool is then molded from the mold preform using the master mold tool.

6385997, May 14, 2002

May 12, 2000

09/570609

Jayson J. Nelson - Webster NY
Eugene G. Hill - Rochester NY
Paul O. McLaughlin - Rochester NY
John C. Pulver - Rochester NY
Michael K. Budinski - Rochester NY

Eastman Kodak Company - Rochester NY

C03B 2326

65 64, 65 37, 65 39, 65 63, 65102, 65111, 65306, 264 25, 264219

A method for fabricating a mold tool for molding optical elements is taught which comprises heating a mold tool blank made from a vitreous material to a temperature above the glass transition temperature of the vitreous material; generating an axial viscosity gradient in the mold tool blank; pressing a punch into an optical quality mold surface of the mold tool blank, the punch including a pressing surface with a predetermined geometry for forming an optical feature; cooling the mold tool blank to a temperature below the glass transition temperature of the material; and removing the punch from the mold tool blank thereby creating the optical feature in the optical quality mold surface. The axial viscosity gradient is achieved by creating an axial thermal gradient. Multiple optical features can be formed in the mold surface of the blank using a single punch such that the pressing, cooling and removing steps are repeated with the punch or the blank being translated to a different position between the last removing step and the next pressing step. In such manner, a high temperature glass mold tool can be formed which can be used to mold glass optical elements either individually or in arrays.

6761046, Jul 13, 2004

Jun 15, 2001

09/882599

Jayson J. Nelson - Rochester NY, 14650
Eugene G. Hill - Rochester NY, 14650
Michael K. Budinski - Rochester NY, 14650
James M. Warner - Rochester NY, 14650

C03B 1314

65102, 651822, 65228, 653701

A method and apparatus for making cylindrical glass preforms with convex, optical quality convex end surfaces is taught. A glass ball preform is placed on a heated lower platen. The temperature of the glass ball preform is raised to a temperature above the glass transition temperature of the glass ball preform. The glass ball preform is engaged with an upper platen. At least one of the upper platen and the lower platen is moved vertically to cause the gap between the upper platen and the lower platen to narrow to a predetermined dimension. Simultaneously, at least one of the upper platen and the lower platen is moved horizontally relative to the other platen to cause the glass ball preform to roll between the upper platen and the lower platen and form a cylindrical preform having a predetermined diameter, the cylindrical preform having convex, optical quality end surfaces.

7249853, Jul 31, 2007

Apr 13, 2005

11/105766

Jayson J. Nelson - Webster NY, US
Marek W. Kowarz - Henrietta NY, US
John C. Brazas - Hilton NY, US
James G. Phalen - Rochester NY, US

Eastman Kodak Company - Rochester NY

G03B 21/14
G02B 5/18

353 20, 353122, 359569

An optical sub-system has an optical element having a curved surface featured with a plurality of recurring surface tooling marks. The depth of any surface tooling mark is less than 0. 2 wavelengths, whereby light is diffracted on the curved surface. A spatial filter blocks the diffracted light and passes the undiffracted light.

2003014, Aug 7, 2003

Feb 13, 2001

09/782325

Clive Rees - Hamlin NY, US
Paul Ludington - Brockport NY, US
Craig Sadlik - Macedon NY, US
Michael Budinski - Pittsford NY, US
Jayson Nelson - Webster NY, US
Paul McLaughlin - Rochester NY, US

Eastman Kodak Company

C03B011/08

065/102000

A method and apparatus are taught for molding glass lens elements from glass preforms. A glass preform is placed on a first mold surface of a first mold element which resides in a first sleeve segment. The temperature of the glass preform, the first mold element, the first sleeve segment, a second mold element, and a second sleeve segment are elevated to at least the glass transition temperature of the glass preform, the second mold element residing in the second sleeve segment. The second mold element and second sleeve segment are moved toward the first mold element and first sleeve segment to form a mold cavity, the mold cavity including a lens chamber and an annular channel projecting from the lens chamber. The glass preform is compressed in the mold cavity to form a glass lens element with the excess glass from the glass preform flowing into the annular channel.

6305194, Oct 23, 2001

Jul 15, 1999

9/354219

Michael K. Budinski - Pittsford NY
Jayson J. Nelson - Webster NY
Phillip D. Bourdage - Penfield NY
David A. Richards - Rochester NY
Paul O. McLaughlin - Rochester NY
Paul D. Ludington - Brockport NY

Eastman Kodak Company - Rochester NY

C03B 2302

65105

A method and apparatus is disclosed for compression molding arrays optical elements which may be later singulated. The apparatus includes first and second mold halves with the second mold half having a central nest and a plurality of predetermined negative optical surface features therein. A glass preform is placed in the central nest and the first and second mold halves and the glass preform are heated to at least the glass transition temperature of the glass preform. The glass preform is then pressed between the first and second mold halves to thereby form an integral array of optical elements with each of the optical elements being a positive of the predetermined negative optical surface features. The integrally formed array of optical elements is then cooled to below the glass transition temperature and removed from the first and second mold halves.

5190233, Mar 2, 1993

Apr 12, 1991

7/684417

Jayson J. Nelson - Webster NY
William E. Payment - Rochester NY
Thomas A. Sisson - Hilton NY
Joseph A. Watkins - Rochester NY

Eastman Kodak Company - Rochester NY

B65H 1926
B65H 2012

242 56R

An apparatus for cutting and feeding strips of web material includes a source (36) of an indeterminate length of web material; means (40-48) for withdrawing a predetermined portion (10) of web material from the source; a guide track (56,98-104) for receiving the lead end of the portion and guiding its edges along a curved path; a rotatable vacuum drum (60) positioned intermediate the ends of the curved path for gripping the portion; a cutter (50) for cutting the web to define a strip; and a motor drive arrangement (62,64,66) for rotating the vacuum drum to feed the strip along the curved path.