Optical device with dustproof structure

Abstract

The invention discloses an optical device with a dustproof structure. The optical device with the dustproof structure comprises a casing and an optical lens, the casing is provided with an opening, the opening is provided with inner walls, the inner walls are provided with first spiral threads, the optical lens is arranged at the opening and provided with an outer surface, second spiral threads are arranged on the outer surface, when the first spiral threads are convex, the second spiral threads are concave, or when the first spiral threads are concave, the second spiral threads are convex, and the concave spiral threads and the convex spiral threads are correspondingly arranged.

Description

technical field [0001] The invention relates to an optical device, in particular to an optical device with a combination of a lens and a casing to achieve the dustproof function. Background technique [0002] An optical device with an optical lens such as a projector, camera or telescope is a common optical device mechanism. Because optical imaging requires magnification or focusing, the optical lens needs to be set on the housing of the optical device in a movable manner. The main body is interfered by the casing when the lens moves, and the optical lens is usually designed not to contact the casing, so there will be a gap between the casing and the lens. After the optical device is used for a long time, dust often enters the casing and even the inside of the optical lens through the above gap , Accumulated dust on the mirror surface leads to blurred light images or reduced brightness. In order to solve this problem, the present invention provides a dust-proof structure use...

AI Technical Summary

Problems solved by technology

[0002] An optical device with an optical lens such as a projector, camera or telescope is a common optical device mechanism. Because optical imaging requires magnification or focusing, the optical lens needs to be set on the housing of the optical device in a movable manner. The main body is interfered by the casing when the lens moves, and the optical lens is usually designed not to contact the casing, so there will be a gap between the casing and the lens. After the optical device is used for a long time, dust often enters the casing and even the inside of the optical lens through the above gap , Accumulated dust on the mirror surface will cause light image blur or brightness reduction. In order to solve this problem, the present invention provides a dust-proof structure used between the optical lens and the housing to solve the above problems

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