公开(公告)号：US20020008193A1

公开(公告)日：2002-01-24

申请号：US09852211

申请日：2001-05-10

Applicant: THOMSON-CSF

Inventor： Philippe Bois ,  Eric Costard ,  Marcel-Francis Audier ,  Eric Herniou

IPC: H01J040/14

CPC classification number: B82Y20/00 ,  H01L27/14649

Abstract: This bi-functional optical detector comprises: a first active photoconduction detection element (1) capable of detecting a first range and a second range of wavelengths (null1 et null2), and associated with a first diffraction grating that it uses to couple the light from the first range of wavelengths (null1) in this first active detection element, so that the first active photoconduction detection element can detect light in the first range of wavelengths (null1); a second active photoconduction detection element (1null) capable of detecting a first range and a second range of wavelengths (null1 et null2), and associated with a second diffraction grating (3null) that it uses to couple the light from the second range of wavelengths (null2) in this second active detection element, so that the second active photoconduction detection element (1null) can detect light in the second range of wavelengths (null2). Furthermore, an additional detection element (2) eliminates the background noise from the first two detection elements.

Abstract translation: 该双功能光学检测器包括：第一有源光电导检测元件（1），其能够检测第一范围和第二波长范围（lambd1 et lambd2），并且与第一衍射光栅相关联，第一衍射光栅用于将来自 在第一有源检测元件中的第一波长范围（lambd1），使得第一有源光电导检测元件可以检测第一波长范围（lambd1）中的光; 能够检测第一范围和第二波长范围（lambd1 et lambd2）的第二有源光电导检测元件（1'），并且与第二衍射光栅（3'）相关联，所述第二衍射光栅用于将来自第二范围 在第二有源检测元件中的波长（lambd2），使得第二有源光电导检测元件（1'）可以检测第二波长范围（lambd2）中的光。 此外，附加的检测元件（2）消除了来自前两个检测元件的背景噪声。