Development Of A Three-Mirror, Wide-Field Sensor, From Paper Design To Hardware

John W. Figoski

doi:10.1117/12.955580

11 October 1989 Development Of A Three-Mirror, Wide-Field Sensor, From Paper Design To Hardware

John W. Figoski

Proceedings Volume 1113, Reflective Optics II; (1989) https://doi.org/10.1117/12.955580
Event: SPIE 1989 Technical Symposium on Aerospace Sensing, 1989, Orlando, FL, United States

Abstract

The Landsat Thematic Mapper imagers have provided moderate resolution, multispectral imagery of the Earth for the past 7 years. Yet, the need exists for higher spatial and spectral resolution and better radiometric accuracy. Santa Barbara Research Center has been exploring technology related to the design, tolerance, and alignment of wide-field, all-reflective sensors for multispectral earth observation. The goals of this study were to design an optical system with reduced fabrication risks, to develop a detailed tolerance budget and to demonstrate precision alignment of a laboratory demonstration unit. The telescope is a three-mirror unobscured form that is telecentric and flat field over 15 degrees at F/4.5, and is diffraction-limited at visible wavelengths. A computer-aided alignment approach aligned the telescope to the budgeted tolerance of 0.05 waves rms at 0.6328 microns. Details of the design, tolerance, and alignment of this telescope are described in two earlier papers. This paper consolidates the findings of those two and emphasizes the importance of keeping the hardware in mind from very early in the design.

Citation Download Citation

John W. Figoski "Development Of A Three-Mirror, Wide-Field Sensor, From Paper Design To Hardware", Proc. SPIE 1113, Reflective Optics II, (11 October 1989); https://doi.org/10.1117/12.955580

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