Lens unit used for camera module having optical filter therein

Abstract

A lens unit for a camera module having an optical filter therein is provided. The lens unit includes a casing, a plurality of lenses, an optical filter, and a fixing member. The casing has a light-receiving hole formed in one side thereof and has a structure in which a cavity is formed. The lenses are aligned in the inside of the casing to transmit light that passes through the light-receiving hole. The optical filter is disposed in the inside of the casing to block a partial wavelength of light and the fixing member maintains the lenses and the optical filter at an aligned state in the inside of the casing. A separate optical filter doesn't need to be mounted in the camera module but is integrally formed in the inside of the casing, so that inflow of foreign substance during the manufacturing process is minimized.

Description

[0001] This application is based upon and claims the benefit of priority from Korean Patent Application No. 2005-8223 filed in the Korean Intellectual Property Office on January 28, 2005, the disclosure of which is hereby incorporated by reference in its entirety. technical field [0002] The present invention relates to a lens unit for a camera module used in a camera system of a digital optical device, more particularly, the present invention relates to a lens unit for a camera module having an optical filter therein, The lens unit can minimize the introduction of impurities during the manufacturing process, minimize the size of the camera module assembly in which the filter is installed, and minimize the reduction in optical performance, and by integrally forming the filter in the case The manufacturing process is simplified internally without separately mounting the filter on the camera module. Background technique [0...

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Problems solved by technology

[0009] However, in the conventional method described above, when the optical filter 170 is mounted on the upper surface of the flexible substrate 120 as described above, when mounted on the image sensor 152, or when mounted inside the case 172, impurities Or the adhesive is attached to the optical filter 170 or contaminates the optical filter 170 during the manufacturing process of the optical filter 170, so that the light-receiving operation of the image sensor 152 is disturbed, and thus a malfunction of the optical performance of the camera module 100 occurs.

[0010] In addition, since the conventional camera module 100 has the optical filter 170 mounted thereon separately from the lens unit 160, a separate mounting structure and manufacturing process for mounting the optical filter 170 are required, so that the manufacturing cost cannot be reduced.

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