Passive optical transponder

Details Passive optical transponder Passive optical transponder

1970-03-19

1977-09-20

Padgett, Benjamin R.

Radiant energy

Luminophor irradiation

250199, 356 5, F21K 200

Patent

active

040499693

ABSTRACT:
An optical identification and communication system wherein an interrogator sends out a broad illuminator beam outside the visible range. Some of this radiation is collected by the transponder optic and focused on a converting phosphor. The response light is recollimated by the transponder optic and transmitted directly back at the interrogator. The use of co-axial optics along with color filters and an electronic "shutter" in the interrogator enables the transmitted and received radiation to be separated.

REFERENCES:
patent: 1385657 (1921-07-01), Bell et al.
patent: 2334765 (1943-11-01), Hermann
patent: 2417384 (1947-03-01), Switzer
patent: 2519825 (1950-08-01), DeMent
patent: 2653109 (1953-09-01), Switzer
patent: 3305633 (1967-02-01), Chernoch
patent: 3380358 (1968-04-01), Neumann

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