Ultra-wide-field lens

An ultra-wide-angle lens and lens technology, applied in the field of ultra-wide-angle lenses, can solve problems such as limited field of view, poor portability, and complex structure, and achieve the effects of reducing graphic distortion, low cost, and high imaging quality

Active Publication Date: 2017-09-01
中山市思创光电科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the existing additional ultra-wide-angle lens, s

Method used

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Experimental program
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specific Embodiment

[0058]

[0059]

[0060] The test result of this embodiment is as Figure 2 to Figure 6 shown.

[0061] Depend on figure 2 It can be seen that the meridian (corresponding to figure 2 Middle T1-T5) direction and sagittal (corresponding to figure 2 The field curvature in the S1-S5) direction is between -0.020㎜ and 0.020㎜. Depend on image 3 It can be seen that the maximum distortion of the ultra-wide-angle lens is within 16%. Depend on Figure 4 It can be seen that the TV distortion of the ultra-wide-angle lens is within 6%. Since the ultra-wide-angle lens mainly shoots large scenes such as scenery, the 6% TV distortion will not have a significant impact on the picture. Depend on Figure 5 It can be seen that the lateral chromatic aberration value produced by light of different wavelengths is within 2um, and only the long wavelength 656nm is at the maximum field of view, and the lateral chromatic aberration is 4um. Depend on Image 6 It can be seen that when th...

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Abstract

The invention provides an ultra-wide-field lens. The ultra-wide-field lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are successively configured from an object side to an image side along an optic axis ; the first lens, the second lens and the third lens are respectively of a meniscus lens with negative power, and a concave surface of the first lens, the second lens and the third lens faces the image side; both the fourth lens and the fifth lens are respectively of a thick lens with positive power; the third lens and the fourth lens are cemented together; the sixth lens is a biconcave thin lens with negative power; and the seventh lens is a meniscus lens with positive power, and a concave surface of the seventh lens faces the image side. By adopting a reasonable optical structure, when the ultra-wide-field lens is applied to different types of mobile phones for shooting, a focal length equivalent silent frame is 11mm, an imaging angle range is 120 to 126 degrees, a greater range can be photographed in a same distance, and a higher picture quality can be achieved; and moreover, the overall size is relatively small, the structure is simple, and the cost is lower.

Description

technical field [0001] The invention relates to the technical field of lenses, in particular to a super wide-angle lens. Background technique [0002] Mobile phones have become a necessity in people's lives today. In recent years, with the continuous increase in the size of photosensitive elements of mobile phone cameras and the addition of technologies such as phase focus and optical image stabilization, mobile phones have gradually replaced traditional digital cameras and become people's first choice for daily photography. [0003] However, due to the limitation of its own volume and weight, the camera of the mobile phone is basically a fixed-focus lens with limited focal length and field of view. At present, the equivalent focal length of mobile phone lenses on the market is usually about 30mm, and the field of view is usually about 70 degrees. It is difficult to take photos with a short focal length, a large viewing angle and a deep field of view. For some large scenes,...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/06
CPCG02B13/0015G02B13/006G02B13/06
Inventor 不公告发明人
Owner 中山市思创光电科技有限公司
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