Phthalonitrile Optical Assembly Bonding for High-Temperature Alignment
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Solution Overview
Problem
Conventional optical assembly adhesives fail to maintain alignment between optical components at high temperatures, limiting the use temperature of optical assemblies to around 150 degrees Celsius.
Innovation Solution
Utilizing phthalonitrile adhesives, which are rigid, thermo-oxidatively stable, and capable of maintaining alignment at temperatures up to 350 degrees Celsius, even under mechanical stress, by positioning optical components in optical alignment and applying phthalonitrile adhesive within the gap between them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional adhesives (UV-curable acrylic and epoxy materials) are used to bond optical components, then the adhesive sets quickly which is useful during manufacture, but the service temperature is limited to approximately 150 degrees Celsius and alignment cannot be maintained above this temperature
Solution Approach 1:
The patent changes the chemical composition parameters of the adhesive by using phthalonitrile resin instead of conventional UV-curable acrylic or epoxy materials. This parameter change enables the adhesive to maintain its bonding properties and alignment stability at temperatures up to 350 degrees Celsius, resolving the temperature limitation while preserving manufacturing precision.
Solution Approach 2:
The patent employs a composite material approach by formulating an adhesive system based on phthalonitrile resin with specific molecular structure characteristics. This composite material provides both the rapid setting capability needed for manufacturing and the high-temperature stability required for maintaining alignment at elevated service temperatures.
2Productivity
If conventional adhesives are used, then the adhesive sets quickly during manufacture, but the adhesive fails to maintain alignment at high temperatures
Solution Approach 1:
The patent modifies the chemical parameters of the adhesive system by substituting conventional adhesives with phthalonitrile-based adhesive. This parameter change maintains the rapid setting characteristic necessary for high productivity during manufacturing while simultaneously providing the thermal stability required to maintain alignment reliability at high temperatures up to 350 degrees Celsius.
3Temperature
If the service temperature of the adhesive is increased to withstand high temperatures, then the use temperature of the optical assembly can be increased, but conventional adhesives fail to maintain alignment above 150 degrees Celsius
Solution Approach 1:
The patent resolves this contradiction by changing the fundamental chemical parameters of the adhesive material to phthalonitrile resin composition. This parameter change enables the adhesive to maintain alignment precision across an extended temperature range from manufacturing through high-temperature service operation up to 350 degrees Celsius, simultaneously achieving both high use temperature capability and sustained manufacturing precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Phthalonitrile adhesives maintain alignment and structural integrity of optical assemblies at high temperatures, enabling their use in environments up to 350 degrees Celsius and transmitting light with minimal disruption.
Implementation Method 1
bonding the first and second optical components together by a phthalonitrile adhesive disposed at least partially within the gap
Data Source
AI summary
An optical assembly as described herein may comprise a first optical component and a second optical component bonded to the first optical component with a phthalonitrile adhesive. The phthalonitrile adhesive is configured to withstand high temperatures with little or no effect on the alignment of the first and second optical components and/or the optical transmission between the first and second optical components. Methods of making an optical assembly may include bonding a first optical component to a second optical component using a phthalonitrile adhesive.