Optical filter and method of manufacturing same

A method of manufacturing an optical filter, the method comprising:

• forming a sheet-cutting portion on a base glass substrate having a thickness of 0.05 mm to 0.3 mm on a per-cell basis;
• tempering the base glass substrate such that upper and lower surfaces thereof are tempered and a side portion thereof is tempered through the sheet-cutting portion as well;
• forming an optical filter on each of upper and lower surfaces of the base glass substrate;
• and
• dividing the base glass substrate into cells where each cell serves as a cell-based optical filter,
• wherein, after tempering of the base glass substrate, a strengthening resin layer is formed on either one or both of the upper and lower surfaces of the base glass substrate in a manner being interposed between the base glass substrate and the optical filter layer, and
• the resin layer is configured in a thickness of 0.1 μm to 20 μm.