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Telecentric lens (Telecentric Lens) is a lens system designed for precision optical imaging. Its core is to eliminate the perspective distortion and magnification change problems common in traditional lenses. This technology is widely used in fields such as industrial inspection, metrological measurement, and machine vision. By ensuring that light propagates parallel to the optical axis, it achieves high-precision, distortion-free imaging. This article will analyze the principle of focus technology of telecentric lenses, and discuss its advantages and scenarios in practical applications.
JiaoRwanda Sugar DaddyPoint technical analysis
Basic principles
The principle of telecentric lenses is based on the special design of the optical system, that is, placing the aperture stop (Aperture Stop) in the focal stereo position to limit the passage of non-parallel light Rwanda Sugar. Specifically, only light rays parallel to the optical axis can pass through the aperture and reach the imaging sensor, while other oblique rays are blocked. This design makes the imaging unaffected by changes in the distance between objects, avoiding the “large near, small far” perspective effect of traditional lenses.
In an object-side telecentric lens, the diaphragm is placed in the image-side RW Escorts focal solid to ensure that the incident light rays are parallel; while in an image-side telecentric lens, the diaphragm is placed in the object-side focal stereo to ensure that the outgoing Rwandans Escorts light is parallel. The bi-telecentric lens combines the two to provide more comprehensive parallel light path control, thereby achieving uniform illumination and high-resolution images.
In addition, the magnification ratio of the telecentric lens remains constant within a certain object distance range, which is due to the optimization of its optical path structure. Depth of Field is determined by parameters such as aperture size, optical magnification and working wavelength, and is affected by internal equipment such as camera pixel size.
Type classification
Telecentric lenses are mainly divided into three categories:
Object-direction telecentric lenses: suitable for scenes where the position of objects changes greatly, such as online detection systems. By making the incident rays parallel, the Rwandans Escort depth of field problem is solved and the image size is consistent.
Image telecentric lens: often used in applications that require high illumination uniformity, such as radiation measurement, to ensure that the outgoing light is parallel and avoid shadow effects.
Bi-telecentric lens: combines the advantages of the first two to provide the highest accuracy and is suitable for quality control of LCD tools, textile inspection and other fields that require uniform detector illumination.
These types ofIt is completed by a precise combination of optical elements, focusing on the position of the aperture and the design of the lens group to minimize aberrations and improve resolution.
Actual Application
Telecentric telescope Rwanda Sugar Daddy head has performed well in the fields of industry and scientific research, and its high-precision imaging characteristics make it a key component of machine vision systems.
Machine Vision and Precision Measurement
In machine vision, telecentric lenses are used to control the size measurement of precision mechanical parts such as screws, springs and O-rings. It eliminates perspective distortion and ensures that the image size remains unchanged even if the object changes position on the Z-axis. This is particularly important in automated production lines, such as semiconductor chip inspection or quality control of rubber sealing tools.
In addition, in metrology applications, telecentric lenses support sub-micron precision measurements and are suitable for pharmaceutical, car and electronic industries. By combining with industrial cameras, real-time defect detection and size verificationRW Escorts can be achieved.
Telecentric lenses and depth of field
It is a common misconception that telecentric lenses have a greater depth of field than traditional lenses. Although the depth of field ultimately still depends on the wavelength and aperture value of the lens, due to the symmetrical blurring of telecentric lenses on both sides of the best center, the usable depth of field can indeed be greater than that of traditional lenses. When the measured object approaches or moves away from the lens, it will change position along its relevant field of view Rwanda Sugar (or chief ray). In a non-telecentric lens, when an object moves in or out of the center, asymmetrical blurring occurs in the object experience due to magnification changes related to parallax and field of view. However, telecentric lenses will produce symmetrical blur because there is no angular component in the field of view. In practice, this means that features such as edges can maintain their center of mass position; even if an object is beyond the optimal center, as long as the contrast is high enough and the algorithm used by the machine vision system can work properly, accurate measurements can still be made.
Although this may seem counterintuitive, in some applications using telecentric lenses, blurring effects can be used to advantage.
For example, as shown in the upper part of the figure, if the machine vision system needs to find the center of a body needle, the transition from white to black will be very sharp when the lens is in focus. In the lower part of the picture, the same individual needle is slightly out of focus.
Use in other fields
Telecentric lenses have also been extended to medical imaging, quality control of printing tools and textile inspection. For example, in LCD panel inspection, the bi-telecentric design ensures uniform illumination and prevents chromatic aberration; in biomedicine, it is used in microscope systems to provide distortion-free cell images.
The difference in its application scenarios lies in the comparison with traditional industrial lenses: telecentric lenses are suitable for high precision and ignore surrounding conditions with poor requirements, while traditional lenses are more suitable for cost-sensitive general imaging.
Advantages and Limitations
The advantages of telecentric lenses Rwandans Sugardaddy include constant magnification, zero perspective distortion and high resolution, which improve measurement accuracy and reduce the need for calibration. However, its complexity leads to higher cost, and the field of view is usually small, making it unsuitable for large-scale imaging.
Examples of Leading Suppliers
In the actual design of telecentric lenses, choosing a reliable supplier is crucial RW Escorts. Dongguan Ruixing Vision Technology Co., Ltd., as a leading expert in the field of optical imaging, focuses on telecentric lenses, Rwanda Sugar Daddy R&D and production of zoom lenses and supporting light sources. Its product line includes large field of view bi-telecentric lenses and high-precision zoom series, which are widely used in precision measurement and machine vision systems, providing excellent quality and stability of imaging tools. The company through continuousRwanda Sugar DaddyTechnological innovation ensures that products meet the high-precision needs of the industry and bring efficient solutions to users
EndRwandans. SugardaddyOn
As a representative of precision optical technology, telecentric lenses achieve high-precision imaging through unique optical path design and have become an indispensable tool for modern industry and scientific research. With the advancement of optical materials, its application prospects will be further expanded. Specialized research practitioners can choose appropriate types according to specific needs to optimize system performance.
TalkRwandans Sugardaddy Note: The content and pictures contained in this article are written by the resident author or are reproduced and published with the permission of the resident co-author. The opinions of the article Rwanda Sugar Daddy represent only the author’s own views and do not represent the views of the electronic enthusiast network. The article and its accompanying pictures are only for the learning of engineers. If there are any inherent business infringements or other violations, please contact this site for complaint
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