Image acquisition at accurate start wavelength
AssigneeCanon U.S.A., Inc.
InventorsBadr Elmaanaoui, Leonid Pesok, Mostafa Raziq
Life of this patent
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Abstract
A wavelength interrogation apparatus includes an optical fiber with a fiber core and an interference pattern in the fiber core, one or more photodiodes or photo-sensors to convert from a transmittance light of the optical fiber to an electrical signal, and an electrical circuit to generate a pulse with a predetermined duration, wherein the apparatus provides image acquisition at accurate start wavelength. The electrical circuit can include a first amplifier, a first differentiator or high-pass filter, a comparator, and a multivibrator, and can include other components.
Claims18
A wavelength interrogation apparatus comprising:
- an optical fiber with a fiber core and an interference pattern in the fiber core;
- a photodiode or a photo-sensor to convert from a transmittance light of the optical fiber to an electrical signal;
- and
- an electrical circuit to generate a pulse with a predetermined duration,
- wherein the apparatus provides image acquisition at accurate start wavelength, and
- wherein the electrical circuit comprises:
- a first amplifier;
- a first differentiator or high-pass filter;
- a comparator;
- and
- a multivibrator.
An intravascular imaging apparatus comprising:
- a light source;
- an interferometer;
- a scanner;
- and
- a wavelength interrogator comprising:
- an optical fiber with a fiber core and an interference pattern in the fiber core;
- a first amplifier;
- a first differentiator or high-pass filter;
- a comparator;
- and
- a multivibrator,
- wherein the intravascular apparatus provides image acquisition at accurate start wavelength.
Dependencies are inferred from the claim text.