Two-piece infrared single-wavelength projection lens set

Abstract

The present invention is a two-piece infrared single-wavelength projection lens set, which sequentially comprises from the imaging side to the image source side: a first lens with positive refractive power, a convex surface near the optical axis on the imaging side surface, and a convex surface on the image source side The near optical axis of the surface is concave, and at least one surface of the imaging side surface and the image source side surface is an aspheric surface; a second lens has positive refractive power, and the near optical axis of the imaging side surface is concave, and the image source side surface The near optical axis is a convex surface, and at least one surface of the imaging side surface and the image source side surface is an aspheric surface; an aperture is arranged in front of the image source side surface of the first lens or between the image source side surface of the first lens and the second image source side surface. between the imaging side surfaces of the two lenses. Thus, a two-piece infrared single-wavelength projection lens set with better image sensing function is achieved.

Description

technical field [0001] The invention relates to a projection lens set, in particular to a miniaturized two-piece infrared single-wavelength projection lens set applied to electronic products. Background technique [0002] Today's digital imaging technology is constantly innovating and changing, especially in the miniaturization of digital carriers such as digital cameras and mobile phones. Therefore, photosensitive components such as CCD or CMOS are required to be more miniaturized. In the application of infrared focusing lenses, in addition to applications In the field of photography, it has also been widely used in the field of infrared reception and sensing of game machines in recent years. In order to make the range of game machine sensing users wider, most of the lens groups that receive infrared wavelengths are those with a larger field of view. Wide-angle lenses are the mainstream. [0003] Among them, the applicant has previously proposed a number of lens sets relat...

AI Technical Summary

Problems solved by technology

[0004] Furthermore, for the infrared receiving and sensing lens sets dedicated to game consoles, plastic lenses are used in pursuit of low cost. First, the poor light transmission of the material is one of the key factors affecting the lack of depth detection accuracy of game consoles. Second, plastic lenses are easy to detect. Because the ambient temperature is too hot or too cold, the focal length of the lens group changes, making it impossible to accurately focus and detect. As mentioned above, the current infrared wavelength receiving lens group cannot meet the two technical issues of accurate sensing of depth and distance in 3D games.

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