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US 2001/0036333 A1Published application
Optical communications equipment
AssigneeSeiko Instruments Inc.
InventorsMasao Kasuga, Akihiro Iino, Tomohiro Shimada
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AssigneeSeiko Instruments Inc.
InventorsMasao Kasuga, Akihiro Iino, Tomohiro Shimada
Estimating the term…
A highly reliable optical communications equipment is offered, which can control light more accurately than heretofore (i.e., less restrictions are imposed on the amount of attenuation and on the resolution) and which is equipped with a latching function. The optical communications equipment includes a piezoelectric actuator, a moving body moved by the piezoelectric actuator as a drive source, a multi-coating filter for controlling light that is a signal medium by movement of the moving body, a drive circuit for controlling the position of the multi-coating filter via the actuator, and a control circuit. The piezoelectric actuator uses bending vibrations produced in a piezoelectric vibrating body as a power source. If the moving body is not moved for a given time, the control circuit sends a function keeping signal to drive the actuator to such an extent that the moving body does not move. Thus, the function of the actuator is maintained.
An optical communications equipment comprising:
An optical communications equipment comprising:
An optical communications equipment comprising:
Dependencies are inferred from the claim text.