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System Design

The MATrIS design hardware consists of:

  • main narrow FOV optical telescope (300-inch and 150-inch focal length configurations)

  • optical platform to accept a variety of medium-sized optics (mission-specific)

  • wide FOV zoom-capable finder/tracking telescope

  • gimbal mounting platform

  • optical tracker

  • GPS tracker

  • gimbal/tracker interface

  • analog and digital recording systems

System Description

Optics

12.5-inch aperture main telescope A narrow FOV telescope based on the ISAFE results was designed for reentry vehicle imaging. The telescope, shown in figures 7 and 8, is a Cassegrain focus configuration with a 12.5-inch (31.75 cm) main mirror. It has two separate secondary mirrors that enable configuration as a 300-inch (762 cm) focal length f/24 system or a 150-inch (381 cm) focal length f/12 system. The optics are designed to operate from the visible spectrum down to long wave infrared (LWIR) (~12µ ). A beam splitter allows simultaneous collection of IR and visible spectra data. The f/24 system is only suitable for targets with high irradiance and slow angular rates since the relative aperture is so small that the cameras require a very long integration time to compensate for the low light levels. The telescope is currently equipped with a Raytheon (Raytheon Company, Waltham, Massachusetts) Radiance HS mid-wave IR camera and a PULNiX (JAI PULNiX, Incorporated, Sunnyvale, California) TM-745i visible light camera. The Radiance is capable of outputting images in a 12-bit digital format and an 8-bit analog format. The telescope is built within a sealed enclosure for protection in inclement weather.

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