Development of a measurement station for large conformal windows using FORM: Flexible Optical Ray Metrology Navy SBIR FY2015.2 Sol No.: Navy SBIR FY2015.2 Topic No.: N152-106 Topic Title: Development of a measurement station for large conformal windows using FORM: Flexible Optical Ray Metrology Proposal No.: N152-106-0539 Firm: Arizona Optical Systems, LLC 5575 S. Houghton Rd. Tucson, Arizona 85747 Contact: Jacob Beverage Phone: (520) 505-1035 Abstract: Arizona Optical Systems has developed the breakthrough technology FORM (Flexible Optical Ray Metrology) that measures complex aspheric windows in transmission. {The FORM system for window metrology uses multiple CCD cameras that look through the window at modulated images on a digital display.} Powerful tomographic software and careful calibration are used to determine the surface irregularity of both surfaces of the window. Having performed the key demonstration of the FORM technique, we now propose to implement the technology to build a general purpose window metrology station that includes hardware, software, and procedures for system calibration and measurement of both surfaces of a wide range of window shapes. In Phase I we will create a prototype system and demonstrate measurement of an 8� steeply curved freeform window. In Phase II, we will build a robust system complete with stages and internal metrology to measure a range of windows up to 24�. Benefits: The program covered in this proposal will make significant advances in FORM technology, enabling �snapshot� type measurement of large windows. AOS is currently developing a robust software engine that is used to calculate the surface distortions. The proposed program will enable the following significant advancements beyond those currently underway: � Demonstration of a general purpose window metrology station. The system will enable a skilled technician to efficiently perform setup, calibration, measurement, and analysis tasks for a wide range of windows. � Implementation of algorithm refinements to enable measurement of steeply curved windows, including 24� windows with 8� sag. These refinements have been identified and will be developed and demonstrated on this program. � Advancement of system calibration to provide the same accuracy over 24� windows as the 4� window demonstrated. {We have recently invented a technique for in situ calibration uses a lithographed reference to calibrate the geometry errors in the display.} This technique will be refined and implemented full scale to achieve the highest possible accuracy for large window. Return