Corning Incorporated

Gautam Meda

Pushkar Tandon

Natesan Venkataraman

Daniel Warren Hawtof

Guangli Hu

Randy Lee Rhoads

Douglas Llewellyn Butler

Vladislav Yuryevich Golyatin

Steven Roy Burdette

Jason Thomas Harris

Butchi Reddy Vaddi

Vladislav Y Golyatin

Shawn Rachelle Markham

Douglas Gregg Neilson

Michael William Price

John Stone, Iii

Daniel Arthur Nolet

May Yanmei Xun

Rick Charles Layton, Iii

Robert A Novak

Michael Rivera

A multicore fiber is provided. The multicore fiber includes a plurality of cores spaced apart from one another, and a cladding surrounding the plurality of cores and defining a substantially rectangular or cross-sectional shape having four corners. Each corner has a radius of curvature of less than 1000 microns. The multicore fiber may be drawn from a preform in a circular draw furnace in which a ratio of a maximum cross-sectional dimension of the preform to an inside diameter of the preform to an inside diameter of the draw furnace is greater than 0.60. The multicore fiber may have maxima reference surface.

Non-circular multicore fiber and method of manufacture

Methods for controlling thickness variations across the width of a glass ribbon () are provided. The methods employ a set of thermal elements () for locally controlling the temperature of the ribbon (). The operating values for the thermal elements () are selected using an iterative procedure in which thickness variations measured during a given iteration are employed in a mathematical procedure which selects the operating values for the next iteration. In practice, the method can bring thickness variations of glass sheets within commercial specifications in just a few iterations, e.g., 2-4 iterations.

Methods for controlling glass sheet thickness

Methods of fabricating glass sheets () are provided in which the sheets are cut from a glass ribbon () composed of a glass having a setting zone temperature range (SZTR). As the glass is drawn, it passes through the SZTR () and an across-the-ribbon temperature distribution is produced at least one longitudinal position along the ribbon to compensate for in-plane stress induced in the sheets () when flattened. Through such thermal compensation, glass sheets () are produced which exhibit controlled levels of distortion when cut into sub-pieces and thus are suitable for use as substrates in the manufacture of, for example, flat panel displays, e.g., LCD displays.

Temperature compensation for shape-induced in-plane stresses in glass substrates

A method of fabricating a glass sheet comprises modifying the thermal stress in the glass such that it is a tensile stress or substantially zero stress in a particular temperature zone of the glass, with that zone selected such that the glass sheet is formed substantially free of warping. In an example embodiment, the modifying of the thermal stress is effected by non-uniform cooling of the glass across the glass transition temperature range. This non-uniform cooling may be applied in cooling segments that are linear and at least two of the segments have differing slope.

Method of fabricating low-warp flat glass

A birefringence minimizing fluoride crystal vacuum ultraviolet (&ldquo;VUV&rdquo;) optical lithography lens element is provided for use with lithography wavelengths<230 nm. The VUV lithography lens element has an optical axis encompassed by a lens perimeter with the fluoride crystal lens having a variation in crystallographic orientation direction which tilts away from the optical center axis towards the lens perimeter to provide minimal birefringence. The invention includes a birefringence minimizing fluoride crystal optical lithography lens blank with a variation in crystallographic orientation direction across the blank.

Birefringence minimizing fluoride crystal optical VUV microlithography lens elements and optical blanks

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Corning, NY, United States of America

Gautam Meda