Patent ID: 8599505

Claim:
An optical filter switching apparatus of a surveillance device comprising: a housing, the housing comprising a bottom housing and a top housing engaged to the top housing, the bottom housing having a sidewall defining a slot; a guiding mechanism placed in the bottom housing, the guiding mechanism comprising a rod parallel with the slot; an optical filter holding bracket attached to the guiding mechanism, wherein the optical filter holding bracket comprises: a through hole defined a first end thereof for extension of the rod therethrough; a protrusion located on an opposite second end and inserted into the slot; a gear rack arranged on the first end; a driving apparatus located adjacent to the gear rack; and at least two optical filters placed on the optical filter holding bracket, wherein the rod and the slot are configured to guide movement of the optical filter holding bracket therealong, and the slot is configured to limit the movement of the optical filter holding bracket between extremities thereof.