Glass manufacturing – Processes – Sol-gel or liquid phase route utilized
Patent
1995-12-29
1998-05-05
Czaja, Donald E.
Glass manufacturing
Processes
Sol-gel or liquid phase route utilized
65 301, 65 3013, 65415, 65440, C03B 800, C03B 37016, C03C 1500, C03C 37018
Patent
active
057467978
ABSTRACT:
A gradient index optical element is disclosed which comprises a surface perpendicular to an optical axis, this surface having points of equal refractive index whose connection provides substantially elliptic lines. This gradient index optical element can be produced, for example, by first pouring a raw material sol into a vessel suited for preparing a rodlike base material comprising a surface perpendicular to its lengthwise direction, said surface having the shape of a rectangle, a rhombus or a polygon symmetrical with respect to its center of gravity, each as is, or having a rounded or elliptical corner subsequently converting the sol to a gel, then subjecting the gel to distribution providing treatment and finally drying and firing the distribution providing gel. A gradient index optical element having, along its X- and Y-directions, refractive index distribution profiles different from each other can be produced at low cost, which permits one construct an optical system suitable for use in a technique of effecting image compression along a lateral direction and which attains a substantial miniaturization of a lens system, for example, a TV lens system.
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Czaja Donald E.
Olympus Optical Co,. Ltd.
Ruller Jacqueline A.
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