Lens optical center and imaging sensor photosensitive surface center alignment system and method
An imaging sensor and photosensitive surface technology, applied in the direction of lens position determination, optical axis determination, optical performance testing, etc., can solve the problems of unfavorable assembly efficiency, complicated and cumbersome operation, etc., achieve simple and fast operation, improve assembly efficiency and imaging quality effect
Pending Publication Date: 2020-11-17
ANKON MEDICAL TECH (SHANGHAI) CO LTD
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However, this method is too complicated and cumbersome to operate, which is not conducive to the efficiency of assembly.
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[0034] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0035] Lens distortion is caused by inconsistent magnification of different fields of view. It will not directly affect the clarity of the image, but it will cause image distortion. Among them, the optical lens will cause barrel distortion (distortion) in the image during the imaging process, such as figure 1 As shown (other lenses are also similar, and the present embodiment takes the endoscope lens as an example). Regarding the distortion of endoscopic imaging, it can be seen that the imaging of a straight line that does not pass through the optical center is curved and deformed; while the imaging of a straight line passing through the optical center is still a straight...
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A lens optical center and imaging sensor photosensitive surface center alignment system and method. The system comprises: a measured object adjusting device for bearing and fixing a measured object and adjusting the measured object until an image of straight line detection lines is not bent, the measured object comprising two straight line detection lines forming a non-zero included angle, and thestraight line detection lines are parallel to the X direction or the Y direction; an imaging sensor adjusting device used for fixing the imaging sensor and adjusting the imaging sensor until the image of the straight line detection lines pass through the center of the photosensitive surface; a lens adjusting device used for fixing a lens, wherein the XY plane is parallel to the photosensitive surface. Through detection of the two straight line detection lines, alignment of the optical center of the lens and the center of the photosensitive surface of the imaging sensor is realized, the operation is simple and rapid, and the assembly efficiency and the imaging quality can be significantly improved.
Description
technical field [0001] The invention relates to the field of imaging technology, in particular to a system and method for aligning the optical center of a lens with the center of a photosensitive surface of an imaging sensor. Background technique [0002] The lens module (such as an endoscope) is the core component of the imaging function, including a lens and an imaging sensor (such as CMOS or CCD, CMOS is used as an example below). The light is photosensitive on the CMOS through the lens, and the light signal is converted into an electrical signal, and finally output as image information. During the assembly process, ensuring that the optical center of the lens coincides with the center of the photosensitive surface is particularly important for image edge consistency and image quality. [0003] At present, it is difficult to ensure that the two lens modules are completely concentric with the manually assembled lens module. The reason is that in order to ensure that no ed...
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IPC IPC(8): G01M11/02
CPCG01M11/0221
Inventor 游庆虎段晓东
Owner ANKON MEDICAL TECH (SHANGHAI) CO LTD