High-strength laminated sheet for optical applications
First Claim
Patent Images
1. A laminated sheet, comprising:
- a surface layer having an optical surface of fire-polished quality; and
a core layer having a higher modulus than the surface layer to increase an overall stiffness of the laminated sheet.
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Abstract
A laminated sheet includes a surface layer having an optical surface that is of fire-polished quality and a core layer having a higher modulus than the surface layer to increase an overall stiffness or fracture toughness of the laminated sheet.
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Citations
73 Claims
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1. A laminated sheet, comprising:
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a surface layer having an optical surface of fire-polished quality; and
a core layer having a higher modulus than the surface layer to increase an overall stiffness of the laminated sheet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A laminated sheet, comprising:
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a compressive surface layer having an optical surface that is of fire-polished quality; and
a core layer;
wherein the thermal expansion coefficients of the surface and core layers are adjusted to control stress and enhance fracture toughness of the laminated sheet. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. A laminated sheet, comprising:
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a surface layer having an optical surface that is of fire-polished quality;
a core layer having a higher modulus than the surface layer to increase an overall stiffness of the laminated sheet; and
a sacrificial layer interposed between the surface layer and the core layer. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A laminated sheet, comprising:
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a core layer;
a surface layer disposed on a first side of the core layer, the surface layer having an optical surface that is of fire-polished quality; and
a bottom layer disposed on a second side of the core layer;
wherein the core layer has a higher section modulus than the surface layer and the bottom layer to increase an overall stiffness of the laminated sheet. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. A method of making a laminated sheet, comprising:
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supplying a first viscous, flowable material into an overflow channel;
overflowing the first viscous, flowable material in a controlled manner to form a first sheet-like flow having at least one untouched surface of fire-polished quality;
depositing at least a second material on a surface of the first sheet-like flow to form a laminated flow; and
drawing the laminated flow into a laminated sheet. - View Dependent Claims (50, 51, 52, 53, 54, 55)
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56. A method of making a laminated sheet, comprising:
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supplying a viscous, flowable material into an overflow channel;
positioning a consumable material in a flow path of the viscous, flowable material so as to introduce a compositional variation to a specific portion of the viscous, flowable material;
overflowing the viscous, flowable material in a controlled manner to form a sheet-like flow having at least one untouched surface of fire-polished quality; and
drawing the sheet-like flow into a laminated sheet. - View Dependent Claims (57)
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58. A method of making a laminated sheet, comprising:
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forming a first sheet-like flow by a continuous sol-gel process;
supplying a viscous, flowable material into an overflow channel;
overflowing the viscous, flowable material in a controlled manner to form a second sheet-like flow;
fusing the second sheet-like flow with a surface of the first sheet-like flow to form a laminated flow; and
drawing the laminated flow into a laminated sheet.
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59. A method of making a laminated sheet, comprising:
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supplying a first and a second viscous, flowable material into independent compartments in an overflow channel;
simultaneously overflowing the first and second viscous, flowable materials to form separate flow streams;
uniting the separate flow streams into a single sheet-like laminated flow; and
drawing the sheet-like laminated flow into a laminated sheet.
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60. A method of making a laminated sheet, comprising:
- drawing a first viscous, flowable material through a slot to form a first sheet-like flow;
supplying a second viscous, flowable material into an overflow channel and overflowing the second viscous, flowable material from the overflow channel in a controlled manner to form a second sheet-like flow having an untouched surface of fire-polished quality;
merging the second sheet-like flow with a surface of the first sheet-like flow to form a laminated flow; and
drawing the laminated flow into a laminated sheet.
- drawing a first viscous, flowable material through a slot to form a first sheet-like flow;
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61. A method of making a laminated sheet, comprising:
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supplying a viscous, flowable material into an open channel;
simultaneously overflowing the viscous, flowable material from a first side of the open channel and drawing the viscous, flowable material from a second side of the open channel;
wherein the viscous, flowable material drawn from the second side of the open channel forms a sheet-like flow;
wherein the viscous, flowable material overflowed from the first side of the open channel forms two separate flow streams having untouched surfaces of fire-polished quality;
merging each of the flow streams with a surface of the sheet-like flow to form a laminated flow; and
drawing the laminated flow into a laminated sheet.
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62. A method of making a laminated sheet, comprising:
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obtaining a sheet of material;
supplying a first viscous, flowable material to a first overflow channel;
overflowing the first viscous, flowable material in a controlled manner to form a sheet-like flow with an untouched surface of fire-polished quality; and
while the sheet-like flow is in viscous, flowable form, merging the sheet-like flow with a surface of the sheet of material to form a laminated sheet. - View Dependent Claims (63, 64, 65, 66, 67)
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68. A method of making a laminated sheet, comprising:
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supplying a first viscous, flowable material to a first overflow channel and a second viscous, flowable material to a second overflow channel;
overflowing the first viscous, flowable material from the first overflow channel in a controlled manner to form a first sheet-like flow with at least one untouched surface of fire-polished quality;
overflowing the second viscous, flowable material from the second overflow channel in a controlled manner to form a second sheet-like flow with at least one untouched surface of fire-polished quality;
drawing the first sheet-like flow into a first sheet and the second sheet-like flow into a second sheet;
feeding the first sheet into a float bath and continuously moving the first sheet across the float bath; and
feeding the second sheet into the float bath and merging the second sheet with the first sheet so as to form a continuously moving laminated sheet across the float bath.
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69. An apparatus for forming a laminated sheet, comprising:
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an overflow means for forming opposed sheet-like flows, the overflow means having at least two independent compartments for receiving a viscous, flowable material;
a forming means positioned below the overflow means for converging and uniting the opposed sheet-like flows into a single drawn sheet flow;
means for pivotally adjusting the overflow means such that a surface of the overflow channel has a desired tilt angle with respect to the horizontal; and
means for delivering a viscous, flowable material into the compartments.
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70. An apparatus for forming a laminated sheet, comprising:
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an overflow channel for forming opposed sheet-like flows from a viscous, flowable material;
a slotted channel positioned below the overflow channel for forming a drawn sheet-like flow;
a forming body positioned below the overflow channel for converging and uniting the opposed sheet-like flows with outer surfaces of the drawn sheet-like flow to form a laminated flow;
means for pivotally adjusting the overflow channel such that a surface of the overflow channel has a desired tilt angle with respect to the horizontal; and
means for delivering a viscous, flowable material into the overflow channel. - View Dependent Claims (71, 72, 73)
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Specification