Tunable filter and tunable filtering device

A tunable filtering device, wherein the tunable filtering device comprises a tunable filter, wherein the tunable filter comprises:

• a cavity and a filtering component disposed inside the cavity, wherein a first surface of the filtering component is provided with at least one through hole;
• and the tunable filter further comprises a drive mechanism, and at least one first adjustable component and at least one second adjustable component that are connected to the drive mechanism and that run through the first surface of the cavity;
• one end of one first adjustable component is disposed opposite to one of the at least one through hole, and a cross sectional area of the end of the first adjustable component is greater than or equal to a cross sectional area of the other end of the first adjustable component;
• one end of one second adjustable component is disposed opposite to a position between two adjacent through holes in the at least one through hole, and a cross sectional area of the end of the second adjustable component is greater than or equal to a cross sectional area of the other end of the second adjustable component;
• and
• the drive mechanism controls the at least one first adjustable component to synchronously move, to change a distance between the at least one first adjustable component and the filtering component, and controls the at least one second adjustable component to synchronously move, to change a distance between the at least one second adjustable component and the filtering component.