Ganz Security ZNT6-P Ganz Thermal Series Specifications - Page 2

Thermal Imaging: There Is No Comparison The diagram below depicts images from the same scene captured with various imaging equipment common in today's surveillance market. Conventional video surveillance options such as CCTV with Infrared Illuminators, Active Visible (Day TV) and Image Intensifiers (i2) cannot adequately define the scene with clarity, as thermal cameras can. Several types of imaging technologies are available for security applications, but thermal cameras offer particular advantages that can extend the surveillance and monitoring capabilities of security systems and personnel. All competing technologies - visible-light camera, night vision and near-infrared - have limited viewing capacity. These low-light devices amplify the available ambient light to produce an image of the scene. Consequently, image intensifiers need a source of illumination to operate effectively and cannot perform well in total darkness. Their effectiveness also is hampered by their limited range. Image intensifiers are subject to a "blooming" effect that results from brightly lit objects in the scene. These light sources appear as intense glows that may hide nearby detail and, if sufficiently strong, may blind the camera by flooding the scene with light. Ganz Thermal Infrared Image Intensifier (i2) CCTV with Infrared Illuminator Active visible Lighting (Day TV) For security operations, closed circuit TV systems are oſten coupled with infrared illuminators, such as diodes, infrared lamps and lasers. With these illuminators, CCTV offers an improvement in imaging compared with day TV devices, but it still requires enhanced illumination when detecting images in semi-darkness and other low-light conditions. Additionally, CCTV's capabilities oſten are limited by range and weather conditions. Day cameras, employing active visible lighting, detect the portion of the electromagnetic spectrum that is visible to the human eye, a segment ranging from 350 nm to 750 nm in wavelength. Using conventional video cameras, these systems splash light on the targeted area to identify intrusions. The light source, however, draws attention to the device, and intruders may breach security simply by evading the light. Moreover, as with any illuminated source, visible-lighting systems are hindered by limited reliability and duration for both the camera and the lighting source. 2