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Questar Distribution
Questar Telescopes |
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QUESTAR SZ 182 Motorized Step Zoom Surveillance Lens
The Questar SZ 182 Multi Focal Length Optical System is a fully motorized, parfocusing; microprocessor controlled Maksutov Cassegrain Catadioptric Optical system with a clear aperture of 178 mm and a base nominal focal length of 2400 mm at F/13.5, with a focal length range in steps of between 635mm to 6000mm. The SZ 182 system internal optical components and baffling system have been designed to maximize light transmission and minimize all optical aberrations to increase overall system performance to unprecedented 1/6 wave PV minimum; and so it is able to read license plates at 2.5 km and identify ships at 20 km. The enhanced mechanics provide for a rapid focal length and focus transition when in the Par focal mode, with switching of magnification and focus generally not to exceed 1 second. The SZ 182 system is equipped to accept any of a variety of standard or high resolution monochrome, or color, or night vision cameras to suit the mission requirements; dual "Night Vision/Day" cameras are also available. This is the most rugged and sophisticated long range surveillance lens available in the medium aperture market today. The internal mechanics allow this unit to tolerate high G loads while maintaining boresight accuracy at each focal length. It is available in both a permanent site fully integrated system or a rapid deployment stand-alone configuration for mounting on customer supplied equipment. Its optional accessories give it versatility and usefulness that can be customized to meet any individual requirement. This is engineered to be a modular system designed for easy upgrades. Each unit is to be controlled locally from a personal computer via RS-422 link (wire, fiber, satellite uplink) permitting worldwide telecommunication. It will have state of the art electronics based on control by the Intel Pentium processor. The software is a "Windows 98" and "Visual Basic" based platform. The compueter keyboard and mouse are used to access the windows containing the command menus. The system software has the ability to control or monitor features such as Time/Date, Temperature, Enclosure Pressure, Multi camera switcher, Automatic light control (ALC), Wide field target acquisition finder camera, automatic sun sensor, heat/ cooling control, lens cap, Pan/Tilt, communication, and video camera control functions. Some cameras will require special or adapted control software and hardware. |
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The system is equipped with four selectable focal lengths (in addition to the standard 2400mm EFL), and up to five selectable filters or automatic light level control.
Primary Lens Available Effective Focal Lengths:
Right: SZ 182 surveillance system installed by Company Seven, viewed from front right (43,664 bytes). SZ 182 Optical Specifications:
Options Include:
Questar SZ 182 Surveillance System Over View: How it Differs from the Step Zoom 180The SZ 182 evolved in response to a number of requests from customers to develop a commercial off the shelf lens and control system to replace the less automated SZ 180 surveillance lens. The new system is modular and so is designed to grow with additional add on products, be more rugged and reliable, provide an improved user interface, with increased control range and greater flexibility to increase overall system versatility. Work is also being done to smoothly integrate extended range (world wide) video transmission manipulation and storage into our overall SZ 182 control system. Description of New System The system is a new mechanical design with new improved mechanics and optical enhancements to increase reliability and performance. The older CPU card will be replaced with a more advanced CPU card, microprocessor and required peripherals. This new CPU has two COM ports that are set at the factory. Depending on the system requirements, either the RS 422 or RS 232 port or IP based communications can be configured to run the SZ182 system and the installed cameras. Expansion space will be left to allow options at a later date. The new SZ182 provides continuous status reporting to the user computer interface. In addition to all basic function display the user is able to access information such as COM, voltage, temperature and pressure information. Built in self-test, and resets can be run from user interface. A separate de-bug window is able to display all monitored on board function and display current status. The current mechanical limit switches of the SZ 180 are replaced with optical limit switches and dead-kill switches at the end of travel. The tab locator on the lens and filter wheel is improved with a tab per lens location, mechanical solenoid position lock and low power high torque precision step motors. The focus stepping motor is replaced with a DC servo motor and precision encoder to increase position accuracy. The addition of two pillow block linear bearing, precision lead screw and anti backlash ball nut are added to increase stability. Specially designed auxiliary optics repositioned and "O" ring mounted primary optics increase the over optical performance and transition speed. The newly designed baffling system will increase light transmission through the system while blocking stray off axis light from deteriorating image quality. Schott colored glass filters replace the older Wratten glass film type filters. The built in manually controlled Light Control hardware and display software will increase the ability to acquire images and correct camera over exposure producing better video results. New serial controlled video and digital cameras are becoming more readily available. Due to this possibility a separate camera control section is set up to work with serial controllable cameras. A control code library will have to be written for each camera function to control from user interface. All control functions are commanded from the user interface. The new user interface is any PC with Windows 95/98/XP/7 that has a serial port with the Questar "Console" control hardware and software installed. Communications and control interface, will be either IP based or RS-422 at the controller and SZ 182. This provides the longest hardwired overall performance range (3,000 meters) and will increase system communications speed. This will require an RS 232 to RS 422 converter to connect to the serial port of the PC or an internal RS 422 card to installed in the PC. If greater distance control is required a modem (33.3 min) will have to be installed and the PC at the SZ 182 location will be configured to work as a remote server with a dedicated line. Lines such as a high-speed (ISDN) data lines could be used to increase reliability and to allow video transmission which may be needed; high-speed video transmission will require these lines. In addition a two channel (min) video frame grabber and high speed modem must be installed and configured in the remote PC. Questar's second-generation (upgraded) control software will allow for smooth integration of two incoming images to be displayed on screen while maintaining control of SZ182 remote system. The video transmission can be done on standard phone line but may encounter jumpy display motion. Video storage and enhancement function will require the addition of a frame grabber in the receiving PC. For current dimensions and a construction overview of the Questar Step Zoom 182 system as provided by Company Seven download the Questar illustrated 17 page brochure from Company Seven's Library. Download size is 1,133,671 bytes (in Acrobat Reader ".pdf" format).
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Contents Copyright 1994-2010 Company Seven All Rights Reserved |
