CHANCCTV-OPTICSLENS

Optical lenses are the core components of optical imaging systems. Their imaging quality and performance directly affect the performance of the imaging system in practical applications. Therefore, it is very necessary to test the various performance indicators of optical lenses. By testing the performance indicators of optical lenses such as resolution, contrast, distortion, dispersion, and focal stability, we can fully understand the imaging characteristics of the lens and provide data support for lens design optimization, production, manufacturing, and subsequent maintenance. Ⅰ . The main contents of optical lens inspection The inspection of optical lenses covers many aspects, mainly to comprehensively evaluate the imaging quality and mechanical performance of the lens. Its main contents include the following directions: 1. Optical performance testing Resolution testing. Resolution is a measure of the lens's ability to distinguish object details and is the primary indicator of l...

Fisheye lens , as an extreme wide-angle lens, has unique imaging characteristics, showing obvious "barrel distortion". This lens can present daily scenes or objects in an exaggerated and humorous way, as if bringing us into a "distorted" world like a funhouse mirror, adding endless fun and creativity to photography. 1.The c haracteristics   of fisheye lenses In the art of photography, to capture a unique distortion effect, you can choose to use a fisheye lens directly. Although it is expensive, it can bring you the ultimate shooting experience. As an ultra-wide-angle lens, the core features of a fisheye lens are its extremely short focal length and ultra-large field of view, which allows it to capture extremely distorted images. Let's take a look at the main features of a fisheye lens. Ultra-wide-angle field of view The field of view of a fisheye lens is much wider than that of an ordinary wide-angle lens, usually 180°~220°, and some are even higher. This ultra-...

The M12 lens is a miniaturized camera lens. Its important features are compactness, lightness, and easy installation and replacement. It is usually used in small devices or scenarios with limited space, and is often used in some surveillance cameras or small cameras. M12 lenses are widely used in small cameras, providing high-definition images and videos to meet the shooting needs of different scenes. Their specific applications include but are not limited to the following aspects: 1. Small space surveillance cameras The M12 lens is suitable for installation in small spaces, such as indoor surveillance cameras, smart home cameras, etc. It can provide clear video images for monitoring the security of small places such as homes, offices, and stores. 2. Car cameras In cars and other vehicles, M12 lenses can be used in small onboard camera systems to record video and images while the vehicle is in motion. For example, they can be used in dashcams and reversing cameras. They can help recor...

Using a fisheye lens , especially a diagonal fisheye lens (also called a full-frame fisheye lens, which produces a rectangular distorted image of the full-frame "negative"), will be an unforgettable experience for a landscape photography enthusiast. The "planetary world" under the fisheye lens is another dreamlike scene. By making good use of this special visual effect, photographers can often use the diagonal fisheye lens to exert their ability to discover unique perspectives and imaginative creativity. Below I will introduce to you the unique shooting method of fisheye lens. 1. Overlooking the city, creating a "planetary wonder" You can use a fisheye lens to shoot a bird's-eye view when climbing a building. With the 180° viewing angle of the fisheye lens, more buildings, streets and other scenes of the city are included, and the scene is spectacular and grand. When shooting, you can deliberately lower the angle of view, and then the horizontal horizo...

A n   IR corrected  lens is a specially designed lens that can capture high-quality photos or videos both during the day and at night. IR corrected  lenses usually have a larger aperture and excellent low-light performance, which can capture detailed images in low-light conditions and also perform well in night shooting. IR corrected  lenses can capture more details and colors at night. The specific applications in night photography are mainly manifested in the following aspects: 1. Night security monitoring In the field of security monitoring, night monitoring has always been a key issue. The IR corrected  lens can automatically switch to black and white mode and use an infrared fill light to provide good night monitoring effects and achieve clear observation of objects within the monitoring range. 2. Night c ity p hotography In the city at night, the IR corrected  lens can help capture scenes such as high-rise buildings, traffic on busy streets, lights a...

Fisheye stitching technology is the result of stitching multiple photos taken with an ultra-wide-angle fisheye lens to generate a panoramic image covering 360° or even a spherical surface. Fisheye stitching technology is an efficient means of creation in panoramic photography, and its application is of great significance to panoramic photography. 1. The principle of fisheye stitching technology Before understanding the application of fisheye stitching technology, let's take a look at the principle of fisheye stitching technology: Fisheye stitching technology mainly relies on the ultra-wide-angle imaging characteristics of fisheye lenses. Fisheye lenses have extremely wide-angle characteristics, and the viewing angle can usually reach 180°~220°. A single image can cover a very large area. In theory, only two images are needed to cover a 360° panoramic range. However, due to the serious distortion problem of fisheye images themselves, 2-4 images are generally required for fisheye st...

The wide-angle lens is one of the common types of photographic lenses. It has a short focal length and can capture a wider scene. It has great application value in shooting landscapes, buildings, people, still lifes, etc. and has great photographic advantages. The main advantages of wide-angle lenses in photography can be seen from the following aspects: 1. Has a wider screen coverage The focal length of a wide-angle lens is relatively short, which allows for a wider field of view and the ability to capture wider landscapes or scenes. It is suitable for shooting large-scale scenery, buildings, city streets, etc., showing more environmental and background information, making the overall picture more open and vivid. 2. Get close to the subject and emphasize the close-up Since wide-angle lenses have a wider viewing angle, the photographer can get closer to the subject to shoot, making the subject more prominent and impactful. At the same time, wide-angle lenses have a strong zooming effe...