De ez van beleírva:
"Optical design and device configuration The zoom lens comprises 3 movable units. Besides compensator and variator a third unit was found to be necessary for compensation of the pupil aberrations caused by the very large zoom factor. All together 11 lenses are employed, among these are 5 aspheric lenses and one diffractive optical element. Most of the lenses are made from Silicon the rest is from AMA Conferences 2013 - SENSOR 2013, OPTO 2013, IRS 2013 2 Germanium and Calcium fluoride. As the diameter of the front lens is limited to some 250 mm by reasons of manufacturability a warm shield is inserted directly in front of the detector window whenever the zoom is tuned to an extremely narrow FOV. The lens can be zoomed continuously between a wide FOV of 30° x 24° and an extreme narrow FOV of 0.6° x 0.48° resulting in a zoom factor of 50. In addition to the 50x optical zoom a digital continuous zoom factor of up to 8x can be applied. The zoom lens is combined with a megapixel detector (1280 x 1024) CMT or InSb being sensitive in the MWIR range between 3.7 µm and 5.1 µm. Both detector types are cooled by integral rotary cooler (RICOR, K548) with 0.75 43 W cooling power. Optionally also a smaller detector with 640 x 512 pixels can be used in case HD video is not needed or not possible due to the system infrastructure (cables, slip rings, displays, recorders, etc.) being not suitable for high resolution video. If a 640x512 detector is used the FOVs are reduced by a factor of 2, without any influence to the ranges. To reduce the mechanical length of the thermal imager to an acceptable length, the optical path is U- folded. The overall length of the housed device is about 700 mm, the weight is approximately 27 kg. A motorized cover protects the front lens in case of sand storm or even during transport. Video electronics The video electronics is the central part of the ATTICA M. The electronic unit comprises the main PC board and an interface control board which is connected with board to board connectors to the main board. In addition a video compression module with H264 compression is connectable. If connected, communication and compressed video stream is available via 1 Mbit Ethernet interface. The image processing electronics operates with a XILINX Virtex 6 FPGA and a DaVinci digital signal processor with 900 MHz clock rate. The FPGA can operate two independent video paths with different graphics and geometrical and dynamical resolution. It is i.e. possible to put a HD-SDI video stream with graphics overlay on a monitor and in parallel provide a 15 bit dynamic video to a tracker. The video electronics provides a lot of different video output standards (many of them in parallel):
• analog: CCIR, 720p25/p30/p50/p60, 1080p25/p30/i50/i60
• digital uncompressed: 720p25/p30/p50/ p60, 1080p25/p30/i50/i60
• digital compressed: 1280x720 25 or 30 fps, 1920x1080 , 25 or 30 fps Simultaneously Ethernet, RS422 and CANopen are available for communication. Beneath communication and image processing, all functions of the objective lens are realized by video electronics."
Akinek ez jelentéssel is bír az ne fogja vissza magát.
"Optical design and device configuration The zoom lens comprises 3 movable units. Besides compensator and variator a third unit was found to be necessary for compensation of the pupil aberrations caused by the very large zoom factor. All together 11 lenses are employed, among these are 5 aspheric lenses and one diffractive optical element. Most of the lenses are made from Silicon the rest is from AMA Conferences 2013 - SENSOR 2013, OPTO 2013, IRS 2013 2 Germanium and Calcium fluoride. As the diameter of the front lens is limited to some 250 mm by reasons of manufacturability a warm shield is inserted directly in front of the detector window whenever the zoom is tuned to an extremely narrow FOV. The lens can be zoomed continuously between a wide FOV of 30° x 24° and an extreme narrow FOV of 0.6° x 0.48° resulting in a zoom factor of 50. In addition to the 50x optical zoom a digital continuous zoom factor of up to 8x can be applied. The zoom lens is combined with a megapixel detector (1280 x 1024) CMT or InSb being sensitive in the MWIR range between 3.7 µm and 5.1 µm. Both detector types are cooled by integral rotary cooler (RICOR, K548) with 0.75 43 W cooling power. Optionally also a smaller detector with 640 x 512 pixels can be used in case HD video is not needed or not possible due to the system infrastructure (cables, slip rings, displays, recorders, etc.) being not suitable for high resolution video. If a 640x512 detector is used the FOVs are reduced by a factor of 2, without any influence to the ranges. To reduce the mechanical length of the thermal imager to an acceptable length, the optical path is U- folded. The overall length of the housed device is about 700 mm, the weight is approximately 27 kg. A motorized cover protects the front lens in case of sand storm or even during transport. Video electronics The video electronics is the central part of the ATTICA M. The electronic unit comprises the main PC board and an interface control board which is connected with board to board connectors to the main board. In addition a video compression module with H264 compression is connectable. If connected, communication and compressed video stream is available via 1 Mbit Ethernet interface. The image processing electronics operates with a XILINX Virtex 6 FPGA and a DaVinci digital signal processor with 900 MHz clock rate. The FPGA can operate two independent video paths with different graphics and geometrical and dynamical resolution. It is i.e. possible to put a HD-SDI video stream with graphics overlay on a monitor and in parallel provide a 15 bit dynamic video to a tracker. The video electronics provides a lot of different video output standards (many of them in parallel):
• analog: CCIR, 720p25/p30/p50/p60, 1080p25/p30/i50/i60
• digital uncompressed: 720p25/p30/p50/ p60, 1080p25/p30/i50/i60
• digital compressed: 1280x720 25 or 30 fps, 1920x1080 , 25 or 30 fps Simultaneously Ethernet, RS422 and CANopen are available for communication. Beneath communication and image processing, all functions of the objective lens are realized by video electronics."
Akinek ez jelentéssel is bír az ne fogja vissza magát.
