发明授权
- 专利标题: Optical grating and method of manufacture
- 专利标题(中): 光栅及其制造方法
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申请号: US12645491申请日: 2009-12-23
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公开(公告)号: US08532450B1公开(公告)日: 2013-09-10
- 发明人: Zhongyan Wang , Wei Gao , Ruolin Li , HongXing Yuan , Jinshan Li
- 申请人: Zhongyan Wang , Wei Gao , Ruolin Li , HongXing Yuan , Jinshan Li
- 申请人地址: US CA Fremont
- 专利权人: Western Digital (Fremont), LLC
- 当前专利权人: Western Digital (Fremont), LLC
- 当前专利权人地址: US CA Fremont
- 主分类号: G02F1/295
- IPC分类号: G02F1/295
摘要:
A method and system for providing an optical grating are described. The optical grating is configured for light of a wavelength and includes a first optically transparent layer, a stop layer on the first optically transparent layer, and a second optically transparent layer on the stop layer. The first optically transparent layer is continuous and includes a material. The second optically transparent layer also includes the material. The second optically transparent layer also includes a plurality of discrete ridges spaced apart by a pitch. The stop layer is configured to be invisible to the light.