Close-up on Bi-telecentric Lenses: Analyzing Their Role in Optical Imaging

Bi-telecentric lenses represent a pinnacle of precision and functionality within the realm of optical imaging, particularly suited for applications demanding utmost accuracy and reliability. Developed with a focus on high telecentricity and minimal distortion, BASSON's STS16 Series Bi-telecentric Lenses cater primarily to the fields of precision measurement and high-precision visual positioning.

These lenses, designed as standard C-mount optics, are compatible with industrial cameras boasting a maximum sensor size of 1 inch (16mm diagonal). They are engineered to deliver exceptional performance across a spectrum of crucial parameters:

Bi-telecentric lenses, exemplified by BASSON's STS16 Series, represent a significant leap forward in optical technology, particularly suited for applications demanding utmost precision and accuracy. At the core of their design are two critical features: exceptionally low distortion and precise bi-telecentricity, each contributing profoundly to their unparalleled performance in optical imaging.

Firstly, these lenses are engineered to exhibit minimal distortion, measuring below 0.05%. Distortion in lenses typically refers to the alteration of an object's shape or size as it appears in the image compared to its actual physical dimensions. In applications requiring precise dimensional analysis, such as metrology, quality control in manufacturing, or medical imaging, accurate representation of object dimensions is crucial. The low distortion characteristic of bi-telecentric lenses ensures that images captured faithfully reflect the true shape and size of the object under observation. This fidelity is indispensable for making accurate measurements and assessments, where even the slightest deviation can impact the reliability of data and conclusions drawn from imaging.

Moreover, bi-telecentricity, maintained below 0.05° in these lenses, plays a pivotal role in enhancing measurement accuracy. Bi-telecentricity refers to the property where rays of light entering the lens remain parallel to the optical axis regardless of the object's position within the field of view. Traditional lenses, by contrast, often suffer from perspective errors and inaccuracies, particularly noticeable in applications requiring precise distance and angle measurements. These errors can distort measurements and lead to inaccuracies in analysis, compromising the reliability of results.

The strict maintenance of bi-telecentricity in BASSON's STS16 Series effectively eliminates such perspective errors. By ensuring that light rays enter the lens in a parallel manner, bi-telecentric lenses enable consistent and accurate imaging across the entire field of view. This capability is particularly beneficial in applications such as dimensional metrology, where maintaining exact object-to-lens positioning and minimizing parallax effects are critical for precise measurement outcomes.

Furthermore, the elimination of perspective errors through bi-telecentric design enhances the lenses' suitability for tasks requiring high-precision visual positioning. In fields like robotics, automated assembly, and semiconductor inspection, where exact alignment and measurement of components are essential, bi-telecentric lenses excel in providing reliable and consistent imaging performance. They facilitate the precise localization of objects and features within the image, aiding in accurate decision-making processes and ensuring operational efficiency.

BASSON's STS16 Series Bi-telecentric Lenses set a new standard in optical imaging by combining exceptionally low distortion and precise bi-telecentricity. These features not only ensure that images captured are faithful and true to the object being observed but also significantly enhance measurement accuracy and reliability. Whether applied in industrial metrology, quality assurance, or high-precision visual positioning, these lenses empower professionals with the tools needed to achieve precise and dependable results in their respective fields. Their technological advancements underscore their indispensability in industries where accuracy, reliability, and consistency are paramount.

The STS16 Series bi-telecentric lenses from BASSON represent a pinnacle of optical engineering, combining expansive field of view capabilities with advanced optical performance enhancements. Designed to cater to a wide array of imaging needs across various scales and applications, these lenses provide critical advantages in precision measurement and detailed inspection tasks.

One of the standout features of the STS16 Series is its impressive field of view, ranging from 11.5mm to 315mm. This broad coverage capability allows these lenses to accommodate diverse imaging requirements, spanning from macroscopic to microscopic scales. In industrial settings, where components and objects vary significantly in size, this versatility is indispensable. Engineers and researchers can seamlessly transition from inspecting intricate microelectronic components to evaluating larger assemblies or products without the need for lens changes. This operational flexibility not only enhances workflow efficiency but also reduces setup time and complexity, enabling faster and more comprehensive analysis.

Moreover, the wide field of view supports comprehensive observation and analysis, crucial for tasks demanding detailed scrutiny and measurement accuracy. In quality control processes within manufacturing, for instance, where detecting minuscule defects or verifying precise dimensions is essential, the STS16 Series lenses provide the clarity and coverage necessary for thorough inspection. This capability extends to applications in medical imaging, where detailed anatomical examinations benefit from the lenses' ability to capture high-resolution images across a range of spatial scales.

In terms of optical performance, the STS16 Series lenses incorporate TG+ multi-layer coatings designed to maximize light transmittance. This technological enhancement plays a pivotal role in optimizing image clarity and quality by reducing glare, minimizing reflections, and enhancing contrast. As a result, images captured with these lenses exhibit sharpness and detail, even under challenging lighting conditions or when imaging highly reflective surfaces. This feature is particularly advantageous in industrial environments where varying light intensities and angles can otherwise degrade image quality and impede accurate analysis.

The ability of these lenses to deliver high-contrast images is especially critical for precise analysis and assessment tasks. In fields such as metrology, where accurately measuring dimensions or detecting surface irregularities requires clear visualization of object features, the optical clarity provided by TG+ coatings ensures that no detail is overlooked. This clarity not only enhances the accuracy of measurements but also supports informed decision-making processes, whether in identifying manufacturing defects or validating product specifications.

Furthermore, the combination of expansive field of view and superior optical performance makes the STS16 Series lenses well-suited for applications requiring both macroscopic overview and microscopic detail. This dual capability is invaluable in fields like forensic analysis, where examining both large-scale crime scenes and minute evidence details demands versatile imaging solutions capable of delivering consistent clarity and precision across varying scales.

The STS16 Series bi-telecentric lenses from BASSON are distinguished not only by their optical excellence but also by their remarkable customizability and durability, tailored to meet the diverse and demanding needs of industrial and scientific applications.

Customizability stands out as a pivotal feature of the STS16 Series, offering customers the flexibility to select lenses precisely tailored to their specific requirements. This includes choosing lenses optimized for particular resolution criteria and depth of field preferences. In fields such as metrology and quality control, where precise measurement and detailed inspection are paramount, the ability to customize lenses ensures that users can achieve optimal imaging performance tailored to the intricacies of their applications. Whether capturing high-resolution images of small, intricate components or maintaining depth of field across varying object distances, this adaptability empowers professionals to enhance their operational efficiency and accuracy.

Furthermore, the STS16 Series allows customization of aperture settings and adjustments to working distances within defined limits. This capability further enhances the adaptability of these lenses to different operational environments. For example, in automated manufacturing processes where consistent imaging conditions are critical for quality assurance, the ability to fine-tune aperture settings ensures optimal light control and image clarity. Similarly, adjusting working distances allows for precise focus and coverage adjustments, accommodating varying object sizes and inspection requirements without compromising on image quality or measurement accuracy.

Beyond customization, the durability of the STS16 Series lenses is another hallmark feature designed to withstand rigorous industrial conditions. Engineered with industrial-grade waterproofing, these lenses are built to endure harsh environments commonly found in manufacturing facilities. This robust construction not only enhances the longevity of the lenses but also ensures consistent performance over extended periods of use. In environments where dust, moisture, or vibrations are prevalent, the waterproofing feature protects the internal components of the lenses, maintaining operational reliability and minimizing downtime due to maintenance or replacement.

The combination of customizability and durability makes the STS16 Series lenses ideally suited for continuous operation in industrial and manufacturing settings. Their ability to maintain performance integrity under challenging conditions enhances operational efficiency and reliability, contributing to seamless production workflows and consistent quality assurance. Whether deployed in automotive manufacturing for precision inspection tasks or in semiconductor fabrication for microscopic analysis, these lenses provide the durability and adaptability necessary to meet the stringent demands of modern industrial applications.

In conclusion, BASSON's STS16 Series Bi-telecentric Lenses represent a technological advancement in optical imaging, offering unparalleled precision, reliability, and versatility. Whether utilized for precision measurement tasks or high-precision visual positioning applications, these lenses consistently deliver exceptional performance, making them indispensable tools for industries demanding accurate and reliable optical solutions.

Basson focuses on machine vision products used for precision measurement and defect detection.

Basson not only provides high-precision bi-telecentric lens systems, telecentric lens systems, telecentric light sources, coaxial illuminations and optical lenses, but also offers customized services.

With products designed in Germany, business planned in the UK and products made in China, Basson is able to provide superior products to customers through its global team. Currently, Basson is in preparation of production and assembly of products in Japan.

Dr. Liu Lu, acting as CTO of Basson, is a PhD degree holder of Oxford University.

Production and testing instruments include optical vacuum coating machines manufactured by Satis in Switzerland and Leybold in Germany, a laser interferometer from Zygo in the US, a spectrophotometer from PerkinElmer in the US, a spherometer from Hofbauer Optik in Germany, a centering instrument from Kyoritsu Electric in Japan, a NC grinding device made by Kojima Engineering in Japan and an automatic centering machine made by Shonan in Japan.