Real-time imaging spectrometer

Details Real-time imaging spectrometer Real-time imaging spectrometer

1991-12-09

1993-06-01

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356 51, 250339, 359308, G01J 312

Patent

active

052164845

ABSTRACT:
An improved AOTF-based imaging spectrometer that has ability to electronically set the bandpass wavelength of an AOTF to any desired value in its wide tuning range, provides significant observational flexibility. This allows observations to be tailored in real-time and enables the spectrometer to address a wide range of objectives and permits real-time modification of the observational parameters, such as in flight or in other situations in which only remote control is possible. Various improvements in optical architecture provide simplified magnification variability, improved image resolution and light throughput efficiency and reduced sensitivity to ambient light. A preferred embodiment employs a camera zoom lens as the input lens. A TeO.sub.2 AOTF and a relay lens are placed at selected distances behind the back focal plane of the input lens, respectively. A charge coupled device (CCD) camera, which comprises a camera, camera zoom lens and a CCD detector is placed at a selected distance behind the relay lens. An RF signal generator is used to drive the AOTF. Two embodiments of the invention are disclosed herein. One operates in the visible
ear-infrared domain, in the wavelength range of 0.48 to 0.76 microns. The other operates in the infrared wavelength range of 1.2 to 2.5 microns.

REFERENCES:
patent: 4490845 (1984-12-01), Steinbruegge et al.
patent: 4622845 (1986-11-01), Ryan et al.
patent: 4652756 (1987-03-01), Ryan et al.
patent: 4663961 (1987-05-01), Nelson et al.
patent: 4883963 (1989-11-01), Kemeny et al.
Gottlieb et al., SPIE, vol. 232, 1980, International Optical Computing Conference (1980) pp. 33-41.
Acoustooptic Devices and Applications by I. C. Chang, IEEE Transactions On Sonics and Ultrasonics, vol. su-23, No. 1, Jan. 1976.
Tunable Acousto-Optic Filters: An Overview by I. C. Chang, Optical Engineering, vol. 16, No. 5, Sep./Oct. 1977.
Acoustooptic Image Filtering by I. B. Belikov et al., Sov. Tech. Phys. Lett. 10(10), Oct. 1984.
Rapid Scanning Fluorescence Spectroscopy Using an Acousto-Optic Tunable Filter by Ira Kurtz et al., Rev. Sci. Instrum. 58(11), Nov. 1987.

Affiliated with

Also associated with

Rating

Real-time imaging spectrometer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Real-time imaging spectrometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Real-time imaging spectrometer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1818613