Browse Prior Art Database

DRIVING ACOUSTO-OPTIC SCANNER TRANSDUCERS

IP.com Disclosure Number: IPCOM000023594D
Original Publication Date: 1978-Jun-30
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 219K

Publishing Venue

Xerox Disclosure Journal

Abstract

The transducer for a broadband acousto-optic scanner appears as a capacitor in parallel with a resistor corresponding to the acoustic energy conversion. In general, the 'reactive power' will dominate the driver requirements. In the case of an acousto-optic scanner, a single swept frequency is sup-plied, which gives a knowledge of the frequency at any instant.

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XEROX DISCLOSURE JOURNAL

DRIVING ACOUSTO-OPTIC SCANNER TRANSDUCERS
H. Rokos

DRIVER

Proposed Classification
U.S. Cl. 350/161W
tnt. Cl. G02b 5/23

The transducer for a broadband acousto-optic scanner appears
as a capacitor in parallel with a resistor corresponding to
the acoustic energy conversion. In general, the 'reactive
power' will dominate the driver requirements. In the case of
an acousto-optic scanner, a single swept frequency is sup-
plied, which gives a knowledge of the frequency at any
instant.

We, therefore, can resonate the transducer capacitance at the
expected frequency, so that the driver sees the parallel
resistance. This allows greater freedom of transducer design
than would be available in the 'broadband' case.

Suitable, tunable resonators could use inductors and varicap
diodes, possibly in conjunction with strip-line resonators.
The driver and modulator could be designed as a set to give
maximum diffraction efficiency at all frequencies.

VARCAP DIODE

TUNING

SUPPLY TRANSDUCER

Volume 3 Number 3 May/June 1978 187

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                   XEROX DISCLOSURE JOURNAL
188
Volume 3 Number 3 May/June 1978

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