CHANCCTV-OPTICSLENS

Surround-view lense s offer convenience for vehicle driving and are quite practical in parking and low-speed driving scenarios, but they are not omnipotent and have some noteworthy drawbacks in in-vehicle applications. 1. Image quality and visual distortion The primary function of many in-vehicle surround-view systems is driver assistance; consequently, their camera sensors and resolutions are lower than those of dedicated dashcams. In low-light conditions, image quality suffers significantly—manifesting as blurriness or increased noise—making it difficult to discern details and prone to causing visual misjudgments. Furthermore, these systems typically employ fisheye lenses, which exhibit pronounced barrel distortion at the edges; this causes the appearance of objects to vary across different viewing angles, potentially leading to errors in distance estimation. 2. There are significant blind spots in the field of view Surround-view systems generate a panoramic view by stitching toget...

Iris recognition technology is a type of biometric technology and is considered one of the most accurate and secure biometric identification technologies currently available. Compared with technologies such as facial recognition and fingerprint recognition, iris recognition has significant advantages in terms of security, stability, and accuracy. Let’s take a look at the key advantages of iris recognition technology: 1. Extremely high uniqueness The iris pattern of a person is formed during fetal development and remains unchanged throughout life. Moreover, each iris is unique. Even identical twins have completely different irises, while fingerprints and other identification methods may have similar patterns. 2. Exceptional stability The iris is one of the most stable biological characteristics of the human body. It is not affected by aging, minor trauma or environmental changes (except for a very few eye diseases), nor is it worn or damaged by daily work. This provides a long-term and...

The principle of Time-of-Flight (ToF) is to calculate distance by emitting infrared light and measuring its round-trip time. Strong light (such as direct sunlight, spotlights, etc.) will generate a lot of background light, which will interfere with the echo signal of the emitted light and cause the ranging to fail. For example, strong sunlight contains abundant near-infrared components, which can enter the receiver of a ToF sensor as background noise. This may drown out the weak modulated light signal reflected back from the target, leading to a decrease in the signal-to-noise ratio (SNR), thereby causing measurement errors, data jumps, or even failure. To ensure that ToF lenses work stably in strong light environments, a multi-layered and multi-dimensional comprehensive protection strategy is needed. The core ideas are noise suppression, signal enhancement, and dynamic adaptation to the environment. Let's take a look at the core processing methods: 1. Strong light suppression at ...

Wide angle lenses , capable of capturing expansive scenes and creating unique perspective effects, are essential tools for photographing cityscapes at night, allowing for the inclusion of grand urban vistas, dazzling lights, and distinctive architectural lines in a single frame. When composing a shot using a wide angle lens, you can start from the following key points: 1. Using leading lines for composition Wide angle lenses are naturally suited for drawing lines, and cities are full of linear elements that can be utilized: roads, traffic, bridges, building edges, etc. When shooting, you can use the lines of roads, bridges, rivers, or buildings to naturally guide the viewer's eye from the foreground to the city skyline or landmarks in the depth of the image, creating a picture with a sense of depth. For example, light trails from cars at night are excellent guiding lines that can make static images full of dynamism. 2. Using foreground and frame composition Wide angle lenses ex...

Compared to traditional mechanical LiDAR, solid-state LiDAR lacks mechanical rotating parts, instead employing purely electronic or micro-electromechanical methods for beam scanning, with a focus on high integration, near-infrared transmittance, thermal stability, and resistance to environmental interference. Solid-state LiDAR is a key technology in the fields of autonomous driving and robotics; its lenses are critical system components, primarily responsible for collimating the emitted laser beam and focusing the reflected signals. 1. What is a solid-state LiDAR lens? As a core optical component of solid-state LiDAR systems, the performance of the LiDAR lens directly determines the system's detection accuracy, range, resolution, and reliability; the lens must not only meet imaging requirements but also efficiently collect extremely weak laser return signals. Consequently, solid-state LiDAR systems impose unique requirements on lens design, placing greater emphasis on miniaturizat...

Aberration refers to the deviation between the actual image formed by an optical system and the ideal image; it is an unavoidable phenomenon in optical system design. Lenses with different focal lengths exhibit significant differences in the types and manifestations of aberrations due to variations in their angle of view, lens curvature requirements, and physical structure. The following are the specific manifestations of several common types of aberrations as they vary with focal length: 1. Distortion The relationship between distortion and changes in focal length is direct and obvious. At short focal lengths, lenses are prone to barrel distortion, with the degree of distortion increasing as the focal length decreases; at long focal lengths, lenses may exhibit pincushion distortion, though the magnitude is generally minor; and at focal lengths of 85mm or greater, distortion becomes virtually negligible. 2. Spherical aberration Spherical aberration is inversely proportional to the cub...