Continuously variable fiber optic attenuator
February 7, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3893753 Optical fibre connector for variable signal attenuation Light device, lens, and fiber optic package Lens connector for optical fibers Fixed optical attenuator for light rays guided by optical fibres In-line optic attenuators for optical fibers Variable attenuation electro-optic device Variable optical attenuator Optical fiber attenuator and method of fabrication Variable optical attenuator for optical fiber coupling InventorAssigneeApplicationNo. 476743 filed on 02/07/1990US Classes:385/33, Lens359/888, Neutral or graded density385/52, With alignment device385/140AttenuatorExaminersPrimary: Healy, BrianAttorney, Agent or FirmForeign Patent References
International ClassesG02B 006/26G02B 005/20 AbstractA continuously variable fiber optic attenuator which can be constructed in a size amenable to direct mounting on optical data application apparatus is presented. The attenuator utilizes a flexible filter of varying optical density which is oriented in an optical coupling region between two optical fibers. The filter can be displaced in a manner to vary the filter density in the optical coupling region and thereby vary the attenuation across the device. A resistor coupled to the attenuator provides means for calibration of the attenuator to provide a highly accurate and reproducible attenuation. | |
