Crystallized glass and method for manufacturing same
US9611170B2 · kind B2 · utility
0Cited by
7References
4Claims
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Key dates
| Filing date | Jan 9, 2014 |
| Grant date | Apr 4, 2017 |
| Priority date | — |
| Expiry date | Jan 9, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/12007
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
What is achieved is an optical wavelength multiplexer/demultiplexer not necessarily requiring the function of adjusting the optical path. A value (ΔLmax−ΔLmin)/L obtained by dividing a difference between a maximum value ΔLmax and a minimum value ΔLmin of ΔL in a range of −40° C. to 80° C. by L is 8×10−6 or less where L represents a length of a crystallized glass (1) at 30° C. and ΔL represents a difference between a length (Lt) of the crystallized glass (1) at each of the temperatures and the length (L) thereof at 30° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.