English 
日本語 
한국어 
français 
Deutsch 
Español 
italiano 
русский 
português 
العربية 
ไทย 
A telecentric lens is a specially designed optical lens intended to correct the parallax effect commonly found in traditional industrial lenses. Within a certain range of object distances, a telecentric lens ensures that the image magnification remains constant, making it an ideal choice for scenarios where the objects being measured are not positioned on the same plane. Due to its parallel light path design, a telecentric lens is widely preferred in machine vision applications that demand extremely low image distortion.
In a machine vision system, the lens serves as a critical imaging component. For the system to achieve its intended functionality, the industrial camera lens must meet specific performance standards. In the early 21st century, as machine vision systems saw increasing use in precision inspection, conventional industrial lenses struggled to meet the high demands of such applications. To bridge this gap and cater to the need for precise inspections, the telecentric lens emerged as a specialized solution.
Depth of Field Control
In a conventional lens, the focal plane is always parallel to the sensor. However, with a telecentric lens, the lens can be tilted to alter the focal plane, allowing for precise control over which areas of the image appear sharp and which areas remain blurred. This feature provides enhanced control over depth of field.
Lens Mobility
In a conventional lens, both the lens and the image sensor (such as camera film or digital sensors) remain parallel. Conversely, in a telecentric lens, the lens can move independently of the camera, enabling the field of view to shift without altering the sensor plane. This makes the telecentric lens particularly suitable for photographing buildings and landscapes, as it can minimize perspective distortion and maintain straight lines in the image.
Cost
Due to its specialized construction and application, a telecentric lens is typically more expensive than a conventional lens.
Aperture
A telecentric lens generally requires a larger aperture, which is beneficial for capturing images in low-light environments.
While a telecentric lens can produce exceptional visual effects, it is also more complex to operate compared to a conventional lens, requiring a higher level of skill from the user.
The primary design purpose of a telecentric lens is to maintain consistent image magnification across varying object distances. This is achieved through its unique optical design, resulting in several notable advantages:
Distance Independence: Regardless of how far the object is from the lens, a telecentric lens ensures consistent image magnification, eliminating distortions caused by object distance variations.
Distortion Control: Telecentric lenses excel in minimizing image distortion, particularly when capturing large or highly detailed objects.
High Clarity: Thanks to its advanced optical design, a telecentric lens captures finer image details with exceptional clarity, providing essential support for precision tasks.
These advantages make the telecentric lens indispensable in industries such as industrial inspection, medical imaging, and scientific research. In scenarios requiring high-precision and stable image processing, a telecentric lens serves as an essential tool.
In contrast to the precision and specialization of a telecentric lens, a conventional lens acts as a versatile "all-rounder". Its flexible design allows it to adapt to various shooting scenarios and imaging needs, offering several key benefits:
High Adaptability: Whether capturing landscapes, portraits, or dynamic subjects, a conventional lens can achieve a range of photographic effects through adjustments in focal length and aperture.
Cost-Effectiveness: Conventional lenses are generally more affordable to manufacture, resulting in a wide variety of options at accessible price points for photography enthusiasts and general consumers.
Ease of Use: Conventional lenses are user-friendly and straightforward to operate, making them ideal for beginners seeking to enjoy the art of photography.
From capturing everyday moments to travel photography and social media sharing, the adaptability and affordability of conventional lenses make them the go-to choice for recording life's memorable experiences.
While both telecentric lenses and conventional lenses serve as the "eyes" of photography and machine vision, they fulfill distinct roles. A telecentric lens excels in precision imaging and stability, making it a staple in professional fields. On the other hand, a conventional lens, with its versatility and affordability, remains a beloved tool for everyday photography.
When choosing a lens, it's essential to consider the specific application and imaging requirements. Whether aiming for unparalleled accuracy or simply capturing the beauty of life, the right lens will help preserve the perfect moment and create lasting memories.
Related Machine Vision Telecentric Lens Products
