发明名称 |
MULTI-CHANNEL UV DETECTION FOR IMPROVED SOLAR SPECTRUM AND UV INDEX ESTIMATION |
摘要 |
The present disclosure describes an ultraviolet (UV) sensor configured to detect a target UV spectrum (e.g., UVB spectrum). The UV sensor includes a first photodiode with a first UV spectral response and a second photodiode with a second UV spectral response. A filter layer having a graded spectral response is formed over the second photodiode, and the second UV spectral response is affected by a controlled parameter (e.g., thickness) of the filter layer. The UV sensor further includes a subtraction circuit coupled with the first photodiode and the second photodiode. The subtraction circuit is configured to provide a differential response based on a difference between the first UV spectral response and the second UV spectral response. The controlled parameter of the filter layer can be selected such that the differential response provides a detected spectral response of the target spectrum. |
申请公布号 |
US2016131525(A1) |
申请公布日期 |
2016.05.12 |
申请号 |
US201514671063 |
申请日期 |
2015.03.27 |
申请人 |
Maxim Integrated Products, Inc. |
发明人 |
Edwards Christopher F.;Allen Dan G.;Pei Cheng-Wei;McGuire Timothy K.;Jones Joy T.;Kerness Nicole D. |
分类号 |
G01J3/28;G01J3/36 |
主分类号 |
G01J3/28 |
代理机构 |
|
代理人 |
|
主权项 |
1. An ultraviolet (UV) sensor, comprising:
a first photodiode with a first UV spectral response; a second photodiode with a second UV spectral response; a filter layer having a graded spectral response, the filter layer being formed over the second photodiode, wherein the second UV spectral response is affected by a controlled parameter of the filter layer; and a subtraction circuit coupled with the first photodiode and the second photodiode, the subtraction circuit being configured to provide a differential response based on a difference between the first UV spectral response and the second UV spectral response. |
地址 |
San Jose CA US |