Suppression of ghost images and side-lobes in acousto-optic devi

Details Suppression of ghost images and side-lobes in acousto-optic devi Suppression of ghost images and side-lobes in acousto-optic devi

1996-09-09

1999-03-30

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4108

Patent

active

058893555

ABSTRACT:
Acousto-optic(AO) devices having a sectioned optical transducer with a side passing optical beam forming an acousto-optic interaction plane, an electrode pattern on the transducer, and oblique demarcation cuts in the electrode pattern which are not normal to the acousto-optic interaction plane. The oblique cuts are at an angle oriented between 5 to 85 degrees, preferably approximately 45 degrees, with respect to the normal to the acousto-optic interaction plane. The oblique demarcation cuts eliminate side-lobes and ghost images in an acoustic field generated by the transducer. The electrode pattern shapes can be diamond, a truncated Gaussian, cosine, square, rectangular, circular, and elliptical. Acousto-Optic Modulators (AOMs). The types of AO devices include: Acousto-Optic Beam Deflectors (AOBDs), Bragg Cells (BCs), Acousto-Optic Tunable Filters (AOTFs), Acousto-Optic Frequency Shifters (AOFSs), and Acoust-Optic Correlators (AOCs).

REFERENCES:
patent: 4425525 (1984-01-01), Smith et al.
patent: 5115810 (1992-05-01), Watanabe et al.

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