Three-piece type infrared single-wavelength lens group

Abstract

The invention discloses a three-piece type infrared single-wavelength lens group, including an aperture, a first lens having positive refractive power, a second lens having positive refractive power, and a third lens having positive refractive power in sequence from an object side to an image side. The focal length of the first lens is f1, the synthetic focal length of the second lens and the third lens is f23, and the following condition is satisfied: 0.5<f1 / f23<1.0. Thus, while the three-piece type infrared single-wavelength lens group can obtain a wide image angle (field angle), and the resolving power of the lens group is remarkably improved.

Description

Technical field [0001] The invention relates to a lens group, in particular to a miniaturized three-piece infrared single-wavelength lens group applied to electronic products. Background technique [0002] Nowadays, digital imaging technology continues to innovate and change. In particular, digital carriers such as digital cameras and mobile phones are developing towards miniaturization, and photosensitive components such as CCD or CMOS are also required to be more miniaturized. In infrared focusing lens applications, in addition to using In the field of photography, in recent years, it has also been widely used in the infrared receiving and sensing field of game consoles. In order to make the game consoles have a wider range of sensing users, the current lens groups that receive infrared wavelengths are mostly those with a larger angle of view. The wide-angle lens group is the mainstream. [0003] Among them, the applicant has previously proposed a number of lens sets related to ...

AI Technical Summary

Problems solved by technology

[0003] Among them, the applicant also previously proposed a number of lens sets related to infrared wavelength reception, but the current game consoles mainly use 3D games that are more three-dimensional, realistic and immersive, so the current or previous lens sets of the applicant are all 2D The detection of plane games is a requirement, so that it cannot meet the depth sensing function that 3D games focus on

[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. When the ambient temperature is too hot or too cold, the focal length of the lens group changes and cannot be accurately focused. As mentioned above, the current infrared wavelength receiving lens group cannot meet the two technical issues of accurate sensing of the depth and distance of 3D games.

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