____________________ > Auburn
> System components
> New Style
> Motor Parts
> Diesel Motor Parts
> Control vision laserstrobe 1ZP20N12 video camera system
Control vision laserstrobe 1ZP20N12 video camera system
Control Vision Inc. LaserStrobe 1ZP20N12 Stroboscopic Video Camera System
The optical energy from each laser unit is transported to the viewing area with a single fiber-optic cable. The laser light reflected from the site is for an instant much brighter than either the direct or reflected light from the process itself. The system exploits this very temporary situation by capturing an image with a special-purpose video camera head that is equipped with a CCD video sensor and a means for very high speed electronic shuttering. The shutter is synchronized with the laser flash. The laser is in turn synchronized with the framing of the video sensor and is fired once for each captured video frame.
A conventional video camera does not incorporate any means for optical shuttering. The shutter interval is simply the interval between successive scans of the vidicon tube, CCD array, or other image sensing device. At the normal framing rate of 30 frames per second, the effective shutter time (exposure time) is therefore 33.3 milliseconds (or usually 16.7 milliseconds if a solid-state image sensor is used). For this system the minimum shutter time is about 50 nanoseconds and it follows that the camera exposure time is reduced by the factor of 667,000:1. The brightness of the a welding arc or plasma in the video image is likewise reduced by the same factor, but the optical contribution to the image by the laser light is not affected because the laser and shutter are synchronized.
The LaserStrobe camera unit is also equipped with a narrow-band optical filter to match the laser wavelength and further suppress the arc lighting. The net combination of both temporal and spectral filtering will typically result in a video image that is free of all of the adverse arc lighting effects except perhaps for some minor remaining evidence of the brightest core of an arc or plasma. Please note that optics for special applications, such as high magnification or long stand-off distances can be specified.
