发明名称 |
Diffraction grating element |
摘要 |
The present invention provides a diffraction grating element that allows the temperature control mechanism to be dispensed with or simplified. The diffraction grating element of the present invention comprises a transparent plate having a first surface and a second surface that are substantially parallel with one another; and a diffraction grating which is formed on a first surface side with respect to the second surface and is substantially parallel with the first surface. At any temperature within a temperature range -20° C. to +80° C., the sum of the rate of change in the period per unit length of the diffraction grating with respect to a temperature change, and the temperature coefficient of the refractive index of a medium that surrounds the diffraction grating element is 0.
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申请公布号 |
US7085054(B2) |
申请公布日期 |
2006.08.01 |
申请号 |
US20050147381 |
申请日期 |
2005.06.08 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
SHIOZAKI MANABU;SHIGEHARA MASAKAZU |
分类号 |
G02B27/44;G02B5/18 |
主分类号 |
G02B27/44 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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