Terrestrial sensor device for satellite or the like

Details Terrestrial sensor device for satellite or the like Terrestrial sensor device for satellite or the like

1995-08-14

1996-12-17

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250349, G01J 502

Patent

active

055856330

ABSTRACT:
The terrestrial sensor device is suitable for use on a satellite or spacecraft. It has a lens for forming an image of the Earth in a focal plane, and a sensor placed in the focal plane. The sensor is constituted by a two-dimensional array of pyroelectric detectors. The device also includes an actuator for oscillating the array in the focal plane, orthogonally to the optical axis of the image-formation lens, at a determined frequency and with an amplitude at least equal to the distribution spacing of the detectors and a processing circuit for acquisition of the output signals of the detectors at the oscillation frequency and for comparison of the output signals with a threshold.

REFERENCES:
patent: 4072863 (1978-02-01), Roundy
patent: 4191967 (1980-03-01), Dansac et al.
patent: 5055689 (1991-10-01), Proffit et al.
NEC Research and Development, No. 97, Apr. '90 Tokyo, Japan, pp. 35-41, XP 000149045 Fumiho Takahashi et al "Development of Precision Earth Sensor for ETS-VI Satellite"-p. 35, left column, line 15-p. 38, right column, line 20, Figs. 1-3. no date.

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