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AssigneeTDK Corporation
InventorShinji Iwatsuka
Estimating the term…
A composite optical element comprising a Faraday rotator, a first and a second birefringent regions, and a fifth region, all said three regions being joined to one plane of said rotator, and a third and a fourth birefringent regions, and a six region, all said three regions being joined to the opposite plane of said rotator, the light that has been transmitted through the first birefringent region passing through the third birefringent region, the light that has been transmitted through the second birefringent region passing through the fourth birefringent region, the optical axis of the first birefringent region and that of the second birefringent region intersecting orthogonally, the optical axis of the third birefringent region and that of the fourth birefringent region intersecting orthogonally, the principal planes of both the first and second birefringent regions having the same ground surfaces, the principal planes of both the third and fourth birefringent regions having the same ground surfaces, the first, second, third, and fourth birefringent regions being of the same material, and the percentage of travel of the light beam through the fifth and six regions being no more than 10%. A process for producing a composite optical element which comprises joining a plurality of a first birefringent plates and a plurality of a second birefringent plates alternately with adhesive to form a laminate, meanwhile joining numbers of third and fourth birefringent plates alternately with adhesive to form a laminate, cutting the laminates into pieces each of which is the composite optical element of claim 1, the joints formed using the adhesive constituting a fifth and a sixth regions.
A composite optical element comprising a Faraday rotator, a first birefringent region, a second birefringent region, and a fifth region, all said three regions being joined to one plane of said rotator, and a third birefringent region, a fourth birefringent region, and a six region, all said three regions being joined to the opposite plane of said rotator,
A composite optical element comprising a Faraday rotator, a first birefringent region and a second birefringent region joined to one plane of said rotator, and a third birefringent region and a fourth birefringent region joined to the opposite plane of said rotator,
An optical attenuator comprising at least a composite optical element and magnetic field-applying means, said optical element comprising a Faraday rotator, a first birefringent region and a second birefringent region joined to one plane of said rotator, and a third birefringent region and a fourth birefringent region joined to the opposite plane of said rotator,
Dependencies are inferred from the claim text.