Spatial Characterization of MAC, a High-Resolution Optical Earth Observation Camera for Small Satellites

Kim, Eugene D.; Choi, Young‐Wan; Yang, Ho‐Soon; Ismail, Mohd. Afiq bin

doi:10.3807/josk.2005.9.2.079

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…To measure MTF in a laboratory, a knife-edge or a point-source is placed at the focus of a collimator 13 . Then tested telescope reimages this knife-edge or point-source at its own detector.…”

Section: Mtf Measurementmentioning

confidence: 99%

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

2013

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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.

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Section: Mtf Measurementmentioning

confidence: 99%

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

2013

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Post-launch analysis, calibration, and validation of CCD line of sight for a space-borne push-broom electro-optical sensor using a global image data set

Shin¹,

Lee²

2015

International Journal of Remote Sensing

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Laser differential confocal paraboloidal vertex radius measurement

et al. 2014

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This Letter proposes a laser differential confocal paraboloidal vertex radius measurement (DCPRM) method for the high-accuracy measurement of the paraboloidal vertex radius of curvature. DCPRM constructs an autocollimation vertex radius measurement light path for the paraboloid by placing a reflector in the incidence light path. This technique is based on the principle that a paraboloid can aim a parallel beam at its focus without aberration and uses differential confocal positioning technology to identify the paraboloid focus and vertex accurately. Measurement of the precise distance between these two positions is achieved to determine the paraboloid vertex radius. Preliminary experimental results indicate that DCPRM has a relative expanded uncertainty of less than 0.001%.

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Spatial Characterization of MAC, a High-Resolution Optical Earth Observation Camera for Small Satellites

Cited by 3 publications

References 5 publications

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

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

Post-launch analysis, calibration, and validation of CCD line of sight for a space-borne push-broom electro-optical sensor using a global image data set

Laser differential confocal paraboloidal vertex radius measurement

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