![]() ![]() Lux, the SI unit equivalent, can be related to footcandles as follows: 1 lux = 0.0929 footcandle. The light intensity for our illumination products is typically specified in terms of footcandles (English unit). Fiber optic illumination usually involves an illuminator and light guide, each of which should be integrated to optimize lighting at the object. In addition, camera settings such as gain, shutter speed, etc., affect the sensor's sensitivity. The camera's minimum sensitivity is also important in determining the minimum amount of light required in the system. High power lenses usually require more illumination, as smaller areas viewed reflect less light back into the lens. Illumination should be increased as the lens aperture is closed (i.e. The imaging lens' aperture (f/#) impacts the amount of light incident on the camera. ![]() Every component affects the amount of light incident on the sensor and, therefore, the system's image quality. The pitfalls of improper illumination are clear, but how are they avoided? To ensure optimal illumination when integrating a system, it is important to recognize the role that choosing the right components plays. These are only a few of the reasons why correct illumination for your application is so important. Non-uniform lighting, in particular, can harm signal-to-noise ratios and make tasks such as thresholding more difficult. Poor illumination can also result in a low signal-to-noise ratio. In addition, shadowing can also cause false edge calculations when measuring, resulting in inaccurate measurements. Blooming or hot spots, for example, can hide important image information, as can shadowing. ![]() System integrators should remember that proper light intensity in the final image is directly dependent upon component selection.Ĭorrect illumination is critical to an image system and improper illumination can cause a variety of image problems. In fact, desired image quality can typically be met by improving a system's illumination rather than investing in higher resolution detectors, imaging lenses, and software. Often, a customer struggles with contrast and resolution problems in an imaging system, while underestimating the power of proper illumination. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |