Development of a medium-size SWIR imaging telescope: integration, calibration, and MTF measurement

Ozgur Yilmaz; Ozgur Selimoglu; Fethi Turk

doi:10.1117/12.2024506

10 September 2013 Development of a medium-size SWIR imaging telescope: integration, calibration, and MTF measurement

Ozgur Yilmaz, Ozgur Selimoglu, Fethi Turk

Proceedings Volume 8844, Optical System Alignment, Tolerancing, and Verification VII; 88440I (2013) https://doi.org/10.1117/12.2024506
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

Development of an imaging telescope having a large mirror generally requires a sound infrastructure including expensive devices such as collimators and interferometers. In this paper we investigate the development and characterization of a medium size telescope (140 mm aperture) using simple techniques. Alignment was done with a mechanical measurement device. Detector was placed using an image of a ruled outside building. Radiometric calibration was done with open-sky images. And finally MTF was measured using stellar images. We found that MTF of our telescope is greater than %15 all along the detector at 20 lp/mm, which is the Nyquist frequency of 25 μm pixel size. This shows that alignment and focus adjustments work well enough in the telescope. These simple techniques can be used for the development and characterization of a medium-size and medium-resolution imaging telescopes.

Citation Download Citation

Ozgur Yilmaz, Ozgur Selimoglu, and Fethi Turk "Development of a medium-size SWIR imaging telescope: integration, calibration, and MTF measurement", Proc. SPIE 8844, Optical System Alignment, Tolerancing, and Verification VII, 88440I (10 September 2013); https://doi.org/10.1117/12.2024506

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