Optical filter and manufacturing method of optical filter

Abstract

The present invention discloses an optical filter and a manufacturing method thereof. The optical filter includes a reinforced glass substrate and optical filter layers formed on each of the upper andlower sides of the reinforced glass substrate. The manufacturing method of the optical filter comprises the steps of: forming a sheet cutting portion on a disc glass substrate on a cell-by-cell basis; reinforcing the disc glass substrate so that the upper and lower portions of the disc glass substrate as well as the side portion through the sheet cutting portion can be reinforced; forming opticalfilter layers on the upper and lower sides of the disc glass substrate, respectively; and forming a cell-unit optical filter by separating the disc glass substrate on a cell-by-cell basis, wherein each unit serves as an optical filter based on the unit.

Description

[0001] Cross references to related applications [0002] This application claims priority from Korean Patent Application No. 10-2017-0125910 filed on September 28, 2017, the entire content of which is incorporated herein by reference for all purposes. Technical field [0003] The present invention relates to an optical filter and a manufacturing method thereof. More specifically, the present invention relates to an optical filter and a manufacturing method thereof, in which the optical filter is provided by using a tempered glass substrate so that the optical filter is strengthened. Background technique [0004] The optical filter is a device that selectively transmits light in a specific wavelength range and is implemented as a multilayer device arranged on a substrate according to an optical design. [0005] Optical filters are used in various fields, and in particular are widely used to control the wavelength of light received by the imaging lens of a camera. [0006] In general, s...

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Problems solved by technology

[0020] However, there is a problem that the thinner the thickness of the glass substrate, the weaker its strength and it is difficult to implement machining and handling methods

In this case, the stress difference between the glass substrate and the multilayer oxide causes deterioration of the strength of the glass substrate, causing serious problems in the case of thin plate glass with a thickness of 0.3T or less

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