阅读说明：本技术 成像透镜以及包含成像透镜的相机模块 (Imaging lens and camera module including the same ) 是由 金志晟 张待植 郑修玟 于 2019-01-18 设计创作，主要内容包括：实施例提供了成像透镜,包括从物体侧到图像侧依次排列且具有折射能力的第一透镜组到第三透镜组,其中第二透镜组和第三透镜组距第一透镜组的距离是可变的,从而使得可以实现具有窄视角的长焦模式和具有宽视角的广角模式,长焦模式下的EFL不超过广角模式下的EFL的2.5倍,2<F<Sub>Number</Sub><5,15mm<TTL≤40mm。(Embodiments provide an imaging lens including a first lens group to a third lens group having refractive power, which are arranged in order from an object side to an image side, wherein a distance of the second lens group and the third lens group from the first lens group is variable, thereby making it possible to realize a telephoto mode having a narrow angle of view and a wide angle mode having a wide angle of view, an EFL in the telephoto mode being not more than 2.5 times, 2 times, an EFL in the wide angle mode<F Number <5，15mm<TTL≤40mm。)

1. An imaging lens comprising first to third lens groups arranged in order from an object side to an image side and having refractive power, wherein:

distances from the first lens group to the second lens group and the third lens group are variable, so that a telephoto mode having a narrow angle of view and a wide-angle mode having a wide angle of view can be realized, and

EFL under the tele mode is not more than 2.5 times of EFL under the wide mode, F number is more than 2 and less than 5, TTL is more than 15mm and less than or equal to 40 mm.

2. The imaging lens as claimed in claim 1, wherein the second lens of the second lens group has an object surface configured to be convex toward the object side and an image surface configured to be convex toward the image side.

3. The imaging lens as claimed in claim 1, wherein the first lens group comprises one lens, the second lens group comprises two lenses, and the third lens group comprises four lenses.

4. The imaging lens as claimed in claim 1, wherein the first lens group includes one lens, the second lens group includes one lens, and the third lens group includes three lenses.

5. The imaging lens as claimed in claim 1, wherein the EFL of the imaging lens is in the range of 8.6 to 16.5.

6. The imaging lens as claimed in claim 1, wherein the total magnification of the imaging lens is no more than 2.5 times.

7. The imaging lens as claimed in claim 1, wherein the first lens group includes a prism and has a thickness of 3mm or more.

8. A camera module, comprising:

the imaging lens according to any one of claims 1 to 7;

an optical filter configured to selectively transmit light having passed through the imaging lens according to a wavelength of the light; and

a light receiving element configured to receive light that has passed through the optical filter,

wherein a maximum distance between the first lens group and the light receiving element on an optical axis is greater than 15mm and not more than 40mm, the maximum distance being defined as TTL.

9. The camera module according to claim 8, wherein a maximum aperture of lenses forming the first to third lens groups is 0.2 to 0.3 times the TTL.

10. The camera module of claim 9, wherein the maximum aperture of the lens is 5mm or less.

Technical Field

Background

Conventional film cameras have been replaced with camera modules of cell phones using small solid-state imaging elements, such as CCDs or CMOSs, Digital Still Cameras (DSCs), video cameras, computer cameras (imaging apparatuses attached to personal computers), and the like, and these imaging apparatuses are being developed with the aim of miniaturization and thinning.

In order to meet this trend, light receiving elements such as Charge Coupled Devices (CCDs) mounted in small solid-state imaging apparatuses are tending to be miniaturized, and the component occupying the largest volume in the imaging apparatuses is the imaging lens component.

Therefore, an element of the imaging apparatus, which is a key problem of miniaturization and thinning, is an imaging lens for forming an image of an object.

Here, in response to high performance of the light receiving element, the imaging lens requires not only a small size but also high performance. However, a zoom lens in which the distance between lenses is variable is widely used as a miniaturized imaging lens to achieve high performance.

Conventional imaging lenses, particularly zoom lenses, may be too thick and therefore not of small size, and may be less sensitive at high resolution and therefore not capable of high performance.

Disclosure of Invention

Technical problem

Drawings

Fig. 1a and 1b are views showing an imaging lens according to a first embodiment.

Fig. 2a shows a graph of aberrations of the imaging lens according to the first embodiment in the wide mode, fig. 2b shows a graph of aberrations of the imaging lens according to the first embodiment in the intermediate mode, and fig. 2c shows a graph of aberrations of the imaging lens according to the first embodiment in the tele mode.

Fig. 3a and 3b are views showing an imaging lens according to a second embodiment.

Fig. 4a shows a graph of aberrations of the imaging lens according to the second embodiment in the wide mode, fig. 4b shows a graph of aberrations of the imaging lens according to the second embodiment in the intermediate mode, and fig. 4c shows a graph of aberrations of the imaging lens according to the second embodiment in the tele mode.

Fig. 5a and 5b are views showing an imaging lens according to a third embodiment.

Fig. 6a shows a graph of aberrations of the imaging lens according to the third embodiment in the wide mode, and fig. 6b shows a graph of aberrations of the imaging lens according to the third embodiment in the tele mode.

Embodiments relate to an imaging lens and a camera module, and a camera module and a digital device including the imaging lens.