The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 1997
Filed:
Oct. 18, 1996
Francedilla.ois Maurice, Verrieres le Buisson, FR;
Thomson Consumer Electronics, Courbevoie, FR;
Abstract
A magneto-optic multitrack reading head on which incident light impinges. The magneto-optic head includes a first layer of magnetic material exhibiting a Kerr effect and which partially reflects the incident light to generate a first reflection ray and which partially transmits the incident light to generate an internal ray. The magneto-optic head further includes a second layer of magnetic material and a layer of non-magnetic material, the non-magnetic layer having a thickness of one-half of a wavelength of the incident light and formed between the first and second layers of magnetic material and through which the internal ray passes. The internal ray is further reflected after passing through the layer of non-magnetic material to generate a second reflection ray parallel to and in-phase with the first reflection ray. The above structure improves the merit factor and signal-to-noise ratio of the magneto-optic reading head.