Aperture Mask for Unambiguous Parity Determination in Long Wavelength Imagers
- Bos, Brent
- July 2011.
- Physical Description:
- 1 electronic document
- Restrictions on Access:
- Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access
- A document discusses a new parity pupil mask design that allows users to unambiguously determine the image space coordinate system of all the James Webb Space Telescope (JWST) science instruments by using two out-of-focus images. This is an improvement over existing mask designs that could not completely eliminate the coordinate system parity ambiguity at a wavelength of 5.6 microns. To mitigate the problem of how the presence of diffraction artifacts can obscure the pupil mask detail, this innovation has been created with specifically designed edge features so that the image space coordinate system parity can be determined in the presence of diffraction, even at long wavelengths.
- Other Subject(s):
- NASA Technical Reports Server (NTRS) Collection.
- Document ID: 20120000801.
NASA Tech Briefs, July 2011; 31.
- Copyright, Distribution as joint owner in the copyright.
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