Abstract

Frequently one would like to know how an object appears, viewed at many different wavelengths. An optical device is described that encodes light from an extended object and focuses it onto a single detector in such a way as to provide information on both the spatial distribution of points on the object and the spectral distribution of light coming from each point on the object. The actual spatial and spectral properties of the object then are recovered by decoding the signals received by the detector. A mask pattern is described that is used in providing spatial information. It can be stepped cyclically to encode a two-dimensional pattern (intensity distribution of radiation). The pattern is simple compared to previously described masks. For an image resolved into, say, m × p spatial elements, the mask need only have (2m − 1)(2p − 1) encoding elements; this results in a considerable reduction in the cost of producing the mask. The device should have many applications, particularly in the field of satellite or space-probe surveillance. A modification of the instrument permits an analysis of the polarization of radiation in each spatial and spectral resolution element.

© 1971 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Spectrometric Imager. Part 2

Martin Harwit
Appl. Opt. 12(2) 285-288 (1973)

Hadamard transform imager and imaging spectrometer

Roderick D. Swift, Richard B. Wattson, John A. Decker, Ralph Paganetti, and Martin Harwit
Appl. Opt. 15(6) 1595-1609 (1976)

A New Grazing Incidence Spectrometric Mounting

D. O. Landon
Appl. Opt. 3(1) 115-120 (1964)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (2)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (9)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription