Invention Grant
- Patent Title: Micro ring grating spectrometer with adjustable aperture
- Patent Title (中): 微孔光栅光栅，可调光圈
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Application No.: US12487735Application Date: 2009-06-19
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Publication No.: US08094306B2Publication Date: 2012-01-10
- Inventor: Yeonjoon Park , Glen C. King , James R. Elliott , Sang H. Choi
- Applicant: Yeonjoon Park , Glen C. King , James R. Elliott , Sang H. Choi
- Applicant Address: US DC Washington
- Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
- Current Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
- Current Assignee Address: US DC Washington
- Agent Thomas K. McBride, Jr.; Linda B. Blackburn
- Main IPC: G01J3/28
- IPC: G01J3/28
Abstract:
A spectrometer includes a micro-ring grating device having coaxially-aligned ring gratings for diffracting incident light onto a target focal point, a detection device for detecting light intensity, one or more actuators, and an adjustable aperture device defining a circular aperture. The aperture circumscribes a target focal point, and directs a light to the detection device. The aperture device is selectively adjustable using the actuators to select a portion of a frequency band for transmission to the detection device. A method of detecting intensity of a selected band of incident light includes directing incident light onto coaxially-aligned ring gratings of a micro-ring grating device, and diffracting the selected band onto a target focal point using the ring gratings. The method includes using an actuator to adjust an aperture device and pass a selected portion of the frequency band to a detection device for measuring the intensity of the selected portion.
Public/Granted literature
- US20100039641A1 Micro Ring Grating Spectrometer with Adjustable Aperture Public/Granted day:2010-02-18
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