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Low distortion optical system

An optical system and optical axis technology, applied in optics, optical components, instruments, etc., can solve the problems of image distortion, small field of view, limited image capture ability, etc. The effect of competitiveness

Pending Publication Date: 2019-10-15
舜宇光学(中山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The currently commonly used video conferencing lenses have such defects: the horizontal field of view is small, and the image capture ability in the horizontal direction is limited, and the wide-angle lens with a field of view greater than 100° usually has serious image distortion

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0056] The total optical length of the optical system TTL = 21.67mm;

[0057] The effective focal length of the optical system is f=2.28mm;

[0058] Table 2 is the parameter list of Embodiment 1:

[0059]

[0060]

[0061] Table 2

[0062] In this embodiment, the aspherical data are shown in Table 3 below:

[0063]

[0064] table 3

[0065] Figure 2 to Figure 4 Respectively schematically represent the modulation transfer function (MTF) analysis diagram of the low-distortion optical system according to the first embodiment of the present invention; the defocus curve of the low-distortion optical system according to the first embodiment of the present invention; according to the embodiment of the present invention Field curvature distortion diagram of a low-distortion optical system.

[0066] By optimizing the above parameter values, the resolution of this embodiment can reach 8 million pixels. Under the ambient temperature change from -40°C to 80°C, the lens can ...

Embodiment approach 2

[0068] The total optical length of the optical system TTL = 21.84mm;

[0069] The effective focal length of the optical system is f=2.52mm;

[0070] Table 4 is the second parameter table of the embodiment:

[0071]

[0072]

[0073] Table 4

[0074] In this embodiment, the aspherical data are shown in Table 5 below:

[0075]

[0076]

[0077] table 5

[0078] Figure 5 to Figure 7 Respectively schematically represent the modulation transfer function (MTF) analysis diagram of the low-distortion optical system according to the second embodiment of the present invention; the defocus curve of the low-distortion optical system according to the second embodiment of the present invention; according to the embodiment of the present invention Field curvature distortion diagram of the low-distortion optical system of II.

[0079] By optimizing the above parameter values, the resolution of this embodiment can reach 8 million pixels. Under the ambient temperature change f...

Embodiment approach 3

[0081] The total optical length of the optical system TTL = 20.25mm;

[0082] The effective focal length of the optical system is f=2.94mm;

[0083] Table 6 is the parameter list of embodiment three:

[0084]

[0085]

[0086] Table 6

[0087] In this embodiment, the aspherical data are shown in Table 7 below:

[0088]

[0089]

[0090] Table 7

[0091] Figure 8 to Figure 10 Respectively schematically represent the modulation transfer function (MTF) analysis diagram of the low-distortion optical system according to the third embodiment of the present invention; the defocus curve of the low-distortion optical system according to the third embodiment of the present invention; according to the embodiment of the present invention Field curvature distortion diagram of the low-distortion optical system of 3.

[0092] By optimizing the above parameter values, the resolution of this embodiment can reach 8 million pixels. Under the ambient temperature change from -40°...

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Abstract

The invention relates to a low distortion optical system. The system comprises a first lens (L1) having negative focal power, a second lens (L2) having the negative focal power, a third lens (L3) having positive focal power, a fourth lens (L4) having the positive focal power, a fifth lens (L5) having the positive focal power, a sixth lens (L6) having the negative focal power, a seventh lens (L7) having the positive focal power and an eighth lens (L8) having the positive focal power which are successively arranged from an object side to an image side along an optical axis. The fifth lens and the sixth lens are bonded to form a gluing lens group having the positive focal power. By using the low distortion optical system, large-angle image capture in a horizontal direction of a 110 degree canbe realized, and at the same time, low distortion performance that system optical distortion is less than 10% is considered, image deformation is small, and an imaging frame is more realistic.

Description

technical field [0001] The invention relates to the field of optical imaging, in particular to a low-distortion optical system. Background technique [0002] With the development of information technology, video conferencing is widely used in remote communication management of enterprises. Video conferencing is increasingly about the realism and interactivity of meetings. In video conferencing, the imaging optical system of the camera is a very important component, and the selection of the imaging optical system has a significant impact on the effect of video conferencing. [0003] Currently commonly used video conferencing lenses have such defects: the horizontal field of view is small, and the ability to capture images in the horizontal direction is limited, and wide-angle lenses with a field of view greater than 100° usually have serious image distortion. In view of the deficiencies in the prior art, the present invention provides a low-distortion optical system to solv...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045G02B13/006G02B13/18
Inventor 贺保丁赖景辉邹文镔梁伟朝
Owner 舜宇光学(中山)有限公司