Mounting process for outgassing-sensitive optics
AssigneeAgilent Technologies, Inc.
InventorsVijaya N. V. Raghavan, Mark Timothy Sullivan, Gerald William Purmal
Life of this patent
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Abstract
Optics used in a high vacuum environment are mounted by bonding by use of addition polymerizing material which used in that environment. The suitability for use in the high vacuum environment is achieved by precise control of outgassing of trapped and dissolved gases, including low molecular weight hydrocarbons and amines, and unreacted material from component parts of said addition polymerizing material. A plurality of application quantities of the polymer are prepared in a large batch for use as pre-mixed frozen (PMF) material. The use of the large batch enables more precise control of mixture so that near-stoichiometric proportions of the polymer components are easily achieved.
Claims22
Method for selecting and providing polymers for use in outgassing-sensitive environments, the method comprising:
- selecting a suitable addition polymerizing material;
- determining a quantity of said material for a single application;
- mixing a quantity of said selected material in a batch of at least four times the quantity for the single application, said mixing resulting in combining component parts of said addition polymerizing material for polymerization, whereby said mixing is provided at stoichiometric proportions within 2% by weight;
- subdividing the batch into single application quantities;
- placing a plurality of the application quantities in a chilled environment such that polymerization is retarded sufficiently for anticipated future use of the plurality of said application quantities as pre-mixed frozen (PMF) material;
- and
- providing individual ones of the application quantities for use in the outgassing-sensitive environments, thereby permitting cold storage of unused application quantities retained for future use while providing said individual ones of the application quantities for use as desired.
Method for assembling optics, the method comprising:
- selecting an addition polymerizing polymer suitable for use in an outgassing-sensitive environment;
- determining a quantity of said material for a single application;
- mixing a quantity of said selected material in a batch of at least four times the quantity for the single application, said mixing resulting in combining component parts of said addition polymerizing material for polymerization, whereby said mixing is provided at stoichiometric proportions within 2% by weight;
- subdividing the batch into single application quantities;
- placing a plurality of the application quantities in a chilled environment such that polymerization is retarded sufficiently for anticipated future use of the plurality of said application quantities as pre-mixed frozen (PMF) material;
- providing individual ones of the application quantities for use in the outgassing-sensitive environments, thereby permitting cold storage of unused application quantities retained for future use while providing said individual ones of the application quantities for use as desired;
- and
- assembling at least one component of the optics by bonding with said PMF material.
A polymer for use in outgassing-sensitive environments, comprising:
- suitable addition polymerizing material selected to provide low total material loss (TML) and collected volatile condensable materials (CVCM) values, said addition polymerizing material mixed by determining a quantity of said material for a single application, mixing a-quantity of said selected material at stoichiometric proportions within 2% by weight in a batch of at least four times the quantity for the single application, said mixing resulting in combining component parts of said addition polymerizing material for polymerization, subdividing the batch into single application quantities, and placing a plurality of the application quantities in a chilled environment such that polymerization is retarded sufficiently for anticipated future use of the plurality of said application quantities as pre-mixed frozen (PMF) material;
- and
- the mixed polymerizing material provided in individual ones of the application quantities for use in the outgassing-sensitive environments, thereby permitting cold storage of unused application quantities retained for future use while providing said individual ones of the application quantities for use as desired.
Dependencies are inferred from the claim text.