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However, the larger the half angle of view, not only reduces the image quality, but also affects the dual-band light focusing
Method used
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Embodiment 1
[0162] see Figure 6 , illustrating the first embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration (longitudinal spherical aberration) on the imaging surface 71 of the first embodiment, please refer to Figure 7A , astigmatic field aberration in the sagittal direction, please refer to Figure 7B 、Astigmatism aberration in the meridional direction (tangential) please refer to Figure 7C , and distortion aberration, please refer to Figure 7D . The Y-axis of each spherical aberration diagram in all embodiments represents the field of view, and its highest point is 1.0. The Y-axis of each astigmatism diagram and distortion diagram in the embodiments represents the image height, and the system image height is 0.825 mm.
[0163] The optical imaging lens system 1 of the first embodiment is mainly composed of six lenses with refractive power, a filter 70 , an aperture 80 , and an imaging surface 71 . The aperture 80 is disp...
Embodiment 2
[0180] see Figure 8 , illustrating the second embodiment of the optical imaging lens 1 of the present invention. Please note that starting from the second embodiment, in order to simplify and clearly express the drawings, only the different surface types of the lenses from the first embodiment are specially marked on the figure, while the rest are the same surface types as the lenses of the first embodiment, For example, concave or convex parts are not indicated separately. For the longitudinal spherical aberration on the imaging plane 71 of the second embodiment, please refer to Figure 9A , Astigmatic aberration in the sagittal direction, please refer to Figure 9B 、Astigmatic aberration in the meridional direction, please refer to Figure 9C , Distortion aberration, please refer to Figure 9D . The design of the second embodiment is similar to that of the first embodiment, only the relevant parameters such as radius of curvature, lens refractive power, lens radius of ...
Embodiment 3
[0183] see Figure 10 , illustrating the third embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging surface 71 of the third embodiment, please refer to Figure 11A , Astigmatic aberration in the sagittal direction, please refer to Figure 11B 、Astigmatic aberration in the meridional direction, please refer to Figure 11C , Distortion aberration, please refer to Figure 11D. The design of the third embodiment is similar to that of the first embodiment, only the radius of curvature, the refractive power of the lens, the radius of curvature of the lens, the thickness of the lens, the aspheric coefficient of the lens or the back focus and other relevant parameters are different, and the material of the first lens 10 is different. The material of the first lens 10 is glass. The object side surface 11 of the first lens 10 has a concave portion 13 ′ near the optical axis and a concave portion 14 ′ near the cir...
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Abstract
The invention discloses an optical imaging lens. A first lens has a negative refractive index. A second lens has a negative refractive index, and an image side surface thereof can have a concave surface portion near an optical axis. An object side surface of a third lens has a convex surface portion near the optical axis, and an image side surface thereof has a convex surface portion near the optical axis. An object side surface of a fourth lens has a convex surface portion near the optical axis. An object side surface of a fifth lens has a concave surface portion near a circumference, and the image side surface has a concave surface portion near the optical axis. An image side surface of a sixth lens has a convex surface portion near the optical axis. ALT is the total sum of center thickness of six lenses from the first lens to the sixth lens on the optical axis; AAG is the total sum of five air gaps from the first lens to the sixth lens on the optical axis; and the center thickness of the first lens on the optical axis is T1, wherein ALT / T1<=6.70 or AAG / T1<= 4.71. The optical imaging lens can increase the lens half viewing angle, has a dual-band property, and can also maintain proper length of the lens.
Description
technical field [0001] The invention relates to an optical imaging lens. Specifically, the present invention refers to a dual-band light imaging mainly used for visible light (visible) and near-infrared (NIR), and is applied to portable electronic products or various video recordings that require devices, such as mobile phones, cameras, tablet computers, personal digital assistants (Personal Digital Assistant, PDA), vehicles or rescue devices, etc. Background technique [0002] Optical imaging lens applications are not limited to shooting images and videos, but also environmental monitoring, driving record photography, virtual reality detectors (VR trackers), face recognition, etc. However, with more and more applications, a single device may need to be equipped with at least one visible light imaging lens and one near infrared imaging lens at the same time. Such a requirement of dual lenses not only increases the cost and complexity of the device, but also affects the des...
Claims
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