Page Banner

United States Department of Agriculture

Agricultural Research Service

Research Project: Optical Detection of Food Safety and Food Defense Hazards

Location: Quality and Safety Assessment Research Unit

Title: Multipurpose hyperspectral imaging system

Authors
item Mao, Chengye -
item Smith, David -
item Lanoue, Mark -
item Poole, Gavin -
item Heitschmidt, Gerald
item Martinez, Luis -
item Windham, William
item Lawrence, Kurt
item Park, Bosoon

Submitted to: Review Article
Publication Type: Research Technical Update
Publication Acceptance Date: June 1, 2005
Publication Date: August 1, 2005
Citation: Mao, C., Smith, D., Lanoue, M.A., Poole, G.H., Heitschmidt, G.W., Martinez, L., Windham, W.R., Lawrence, K.C., Park, B. 2005. Multipurpose hyperspectral imaging system. NASA Tech Briefs. 29(8):30-31 (Technical Article).

Technical Abstract: A hyperspectral imaging system of high spectral and spatial resolution that incorporates several innovative features has been developed to incorporate a focal plane scanner (U.S. Patent 6,166,373). This feature enables the system to be used for both airborne/spaceborne and laboratory hyperspectral imaging with or without relative movement of the imaging system, and it can be used to scan a target of any size as long as the target can be imaged at the focal plane; for example, automated inspection of food items and identification of single-celled organisms. The spectral resolution of this system is greater than that of prior terrestrial multispectral imaging systems. Moreover, unlike prior high-spectral resolution airborne and spaceborne hyperspectral imaging systems, this system does not rely on relative movement of the target and the imaging system to sweep an imaging line across a scene. This compact system (see figure) consists of a front objective mounted at a translation stage with a motorized actuator, and a line-slit imaging spectrograph mounted within a rotary assembly with a rear adaptor to a charged-coupled-device (CCD) camera. Push-broom scanning is carried out by the motorized actuator which can be controlled either manually by an operator or automatically by a computer to drive the line-slit across an image at a focal plane of the front objective. To reduce the cost, the system has been designed to integrate as many as possible off-the-shelf components including the CCD camera and spectrograph. The system has achieved high spectral and spatial resolutions by using a high-quality CCD camera, spectrograph, and front objective lens. Fixtures for attachment of the system to a microscope (U.S. Patent 6,495,818 B1) make it possible to acquire multispectral images of single cells and other microscopic objects. Publication Date: Aug 01, 2005

Last Modified: 10/25/2014
Footer Content Back to Top of Page