Tracker using angle-converting cones

Details Tracker using angle-converting cones Tracker using angle-converting cones

1990-02-23

1991-06-11

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250216, 356152, H01J 314, G01J 120

Patent

active

050234404

ABSTRACT:
An optical tracker includes a plurality of detectors (20, 22), each of which is associated with an etendue-preserving concentrator (27, 28) that directs radiation to it. The concentrators (27, 28) associated with complementary detectors (20, 22) are oriented at angles with respect to each other such that their complementary angle-sensitive regions overlap. As a consequence, the outputs of the detectors can be used to aim the tracker even though the concentrators direct radiation to the detectors in a non-imaging manner.

REFERENCES:
patent: 3446970 (1969-05-01), Moskowitz et al.
patent: 3599001 (1971-08-01), Rolnik et al.
patent: 3899672 (1975-08-01), Levi-Setti
patent: 3923381 (1975-12-01), Winston
patent: 4042821 (1977-08-01), Mierzwinski
patent: 4255782 (1980-09-01), Kuppenheimer, Jr. et al.
patent: 4273196 (1981-06-01), Etsusaki et al.
patent: 4424801 (1984-01-01), Mori
patent: 4618259 (1986-10-01), Czichy et al.

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