Optical lens

Optical lens is necessary in machine vision system components, which directly influences the imaging quality of implementation of algorithm is superior, influence and effect. In addition to chosen appropriate lens, reduce machine vision system cost, is the only way to industrial prosperity. Optical lens many specifications, sometimes unavoidable dizzy. Optical lens from focal length can be classified short focal lens, the b.f lens, telephoto lenses, From view size has a wide Angle, standards, telephoto lens, Structure points have fixed focal lens, delineating light manual light delineating focal lens, automatic light delineating focal lens, manual zoom lens, automatic zoom lens, automatic aperture electrical zoom lens, electric three variable (aperture, focus, focus all variable) lenses etc. According to our experience, Russia's use of optical lenses are very cheap.

introduction

Optical lens is necessary in machine vision system components, which directly influences the imaging quality of implementation of algorithm is superior, influence and effect. In addition to chosen appropriate lens, reduce machine vision system cost, is the only way to industrial prosperity. Optical lens many specifications, sometimes unavoidable dizzy. Optical lens from focal length can be classified short focal lens, the b.f lens, telephoto lenses, From view size has a wide Angle, standards, telephoto lens, Structure points have fixed focal lens, delineating light manual light delineating focal lens, automatic light delineating focal lens, manual zoom lens, automatic zoom lens, automatic aperture electrical zoom lens, electric three variable (aperture, focus, focus all variable) lenses etc. According to our experience, Russia's use of optical lenses are very cheap.

introduction

For the camera lens, the stand or fall of influence of imaging quality is always the key factors, digital camera certainly no exception. Although the digital camera of CCD camera, in principle of limited resolution of optical resolution less demanding, But on the other hand, because of the digital camera imaging (because the area is lesser CCD imaging in digital camera is, while the CCD area more traditional 35mm camera film much smaller), and therefore need lens guarantee of imaging quality. For example, on a particular determined by perturbation body, horizontal need 200 pixels to perfect reappear its details, if imaging width to 10mm, the optical resolution for the 20 line/mm lens can be competent, if imaging width is 1mm it require lens optical resolution must in 2000 line/millimeter above. On the other hand, the traditional film to ultraviolet ray is more sensitive to shoot frequently to the mirror, and adding UV of infrared comparison sensitive, CCD camera increase special coating or additional filter will greatly enhance image quality. Lens of physical caliber is also must consider, and no matter how the relative caliber, its physics diameter, the greater the flux is greater, digital camera to light accept and control will be better, imaging quality also is better.

At present the commercial or household digital camera lens, some factory adopts relatively good lens. Fuji camera adopted 170 line/millimeters resolution professional Fuji dragon lens, this built-in new Fuji dragon than most SLR camera lens more clearly. Not only in precision to ensure the quality of images filmed, and its lens error rates also achieve amazing 0.3%, more general digital camera low 2/3.

Another part of the digital camera, also provides a telephoto lens and wide-angle two ways. This in your choice digital camera, is also a reference index.

In the traditional digital camera, wide-angle lens is a focal length less than standard lens, perspective than standard lens, the longer than fisheye lens, visual Angle is less than fisheye lens photography lens. Wide-angle lens is divided again ordinary wide-angle lens and super wide-angle lens two kinds. 135 camera ordinary wide-angle lens the focal length of the general is 38-24 millimeter, perspective for 60-84 degree; Super wide-angle lens focus for 20-13 millimeter, perspective for 94-118 degrees. Because the wide-angle lens the focal length of the short, the perspective, in a relatively short period of shooting distance range, able to photograph a large scenery. So, it is widely used in the big occasion wind photography shooting. In photography creation, use the wide-angle lens photography, can achieve the effect of the following several aspects: one is to increase pictures of space depth, 2 it is preview longer, can guarantee the foreground subject and scenery on the picture all can clear representation. So, modern most pocket type automatic camera (known as fool camera) using 38-35 mm of ordinary wide-angle lens, 3 it is lens covers the area is large, the shooting scene wide range, Four is in the same shooting distance than the scenery, filming location using standard lens by film scene in the picture images small; 5 is the picture appears easily perspective deformation and image distortion lens, the defects of the focal length of the shorter and filmed the closer, the defects is more significant.

At present the commercial grade of digital cameras in use and ordinary 35 mm camera same ordinary wide-angle lens, because its king deeply, the shooting range, so the choice advantages such as digital camera, digital camera, the same performance will have wide Angle and distance of the digital camera will performance is better.