{"project":{"acronym":"","projectId":9870,"title":"Very large computer generated holograms for precision metrology of aspheric optical surfaces","primaryTaxonomyNodes":[{"taxonomyNodeId":10743,"taxonomyRootId":8816,"parentNodeId":10740,"level":3,"code":"TX08.1.3","title":"Optical Components","definition":"Optical component technologies are ultimately aimed at finding breakthrough technologies that can enable entirely new instrument or observatory architectures. Optical component technologies are grouped in the following categories: ultraviolet imaging, wide field of view imaging for near-Earth asteroids, and instruments for quantum interferometry. These improvements in optical components must complement improvements in associated detectors.","exampleTechnologies":"Mirrors, lenses, interferometers, gratings, prisms, fibers, dynamic pointing components (e.g. field steering mirrors), active optical elements, advanced surface technologies (e.g. frequency selective surfaces and composites), ground metrology and systems","hasChildren":false,"hasInteriorContent":true}],"startTrl":2,"currentTrl":4,"endTrl":4,"benefits":"All large aspheric optical surfaces to be launched into space can benefit from accurate metrology with large CGHs. In particular, the thin shell mirrors for the X-ray telescopes, fabricated with a slumping process, can be measured with large CGHs to high accuracy, so can the mandrels for making these mirrors. The JWST primary segments, already measured with 6\" CGHs, could be better tested with larger CGHs as well.
Large aspheric surfaces used in ground based telescopes, the lithographic lenses, the Extreme Ultra-Violet (EUV) lithography systems, as well as the large format aerial photography cameras will be better tested with large CGHs.","description":"Both ground and space telescopes employ aspheric mirrors. A particular example is the X-ray telescope where primary and secondary mirrors have nearly cylindrical surfaces. Computer Generated Holograms (CGH), in combination with commercial interferometers, provide high resolution and high accuracy measurements of aspheric optical surfaces. The current state of the art CGHs are made on 6\" square substrates such as those for testing the primary segments of James Webb Space Telescope. However, larger CGHs are always desired. A larger CGH enables testing of correspondingly larger convex and nearly cylindrical concave surfaces in one shot; studies have shown that larger CGHs also offer better imaging of the surface under test, which improves the CGH null test system's Instrument Transfer Function, an equivalent metric to an imaging system's Modulation Transfer Function. Furthermore, pursuit of improving CGH test accuracy never ends. The fundamental limiting factor is quality of the substrate. The current state of the art technology is still unable to fabricate general CGHs of arbitrary symmetry on high quality custom substrates. Arizona Optical Metrology LLC (AOM) proposes to address these problems. We propose to work with our collaborators at the ebeam facility of Jet Propulsion Laboratory of NASA to write large CGHs on high quality substrates. We anticipate the writing has reasonable yet non-negligible errors which cause errors in the aspheric wavefront the CGH produces. The wavefront error must be calibrated in order to meet the demanding accuracy requirement of precision aspheric surface metrology. We propose to develop a technology that enables accurate calibration of the writing error, such that the CGH still measures an aspheric surface to an excellent accuracy of a couple of nm rms. The goal of phase 1 is to develop the software tools for calibrating the CGH writing error, and fabricate a couple of 9 inch diameter CGHs to experimentally validate the technology.","startYear":2012,"startMonth":2,"endYear":2012,"endMonth":9,"statusDescription":"Completed","principalInvestigators":[{"contactId":83334,"canUserEdit":false,"firstName":"Chunyu","lastName":"Zhao","fullName":"Chunyu Zhao","fullNameInverted":"Zhao, Chunyu","primaryEmail":"czhao@cghnulls.com","publicEmail":true,"nacontact":false}],"programDirectors":[{"contactId":206378,"canUserEdit":false,"firstName":"Jason","lastName":"Kessler","fullName":"Jason L Kessler","fullNameInverted":"Kessler, Jason L","middleInitial":"L","primaryEmail":"jason.l.kessler@nasa.gov","publicEmail":true,"nacontact":false}],"programExecutives":[{"contactId":215154,"canUserEdit":false,"firstName":"Jennifer","lastName":"Gustetic","fullName":"Jennifer L Gustetic","fullNameInverted":"Gustetic, Jennifer L","middleInitial":"L","primaryEmail":"jennifer.l.gustetic@nasa.gov","publicEmail":true,"nacontact":false}],"programManagers":[{"contactId":62051,"canUserEdit":false,"firstName":"Carlos","lastName":"Torrez","fullName":"Carlos Torrez","fullNameInverted":"Torrez, Carlos","primaryEmail":"carlos.torrez@nasa.gov","publicEmail":true,"nacontact":false}],"projectManagers":[{"contactId":410436,"canUserEdit":false,"firstName":"Ron","lastName":"Eng","fullName":"Ron Eng","fullNameInverted":"Eng, Ron","primaryEmail":"Ron.Eng@nasa.gov","publicEmail":true,"nacontact":false},{"contactId":461333,"canUserEdit":false,"firstName":"Theresa","lastName":"Stanley","fullName":"Theresa M Stanley","fullNameInverted":"Stanley, Theresa M","middleInitial":"M","primaryEmail":"theresa.m.stanley@nasa.gov","publicEmail":true,"nacontact":false}],"website":"","libraryItems":[],"transitions":[{"transitionId":65709,"projectId":9870,"transitionDate":"2012-09-01","path":"Closed Out","closeoutDocuments":[{"title":"Final Summary Chart","file":{"fileExtension":"pdf","fileId":305886,"fileName":"SBIR_2011_1_FSC_S2.05-9090","fileSize":80563,"objectId":65709,"objectType":{"lkuCodeId":1841,"code":"TRANSITION_FILES","description":"Transition Files","lkuCodeTypeId":182,"lkuCodeType":{"codeType":"OBJECT_TYPE","description":"Object Type"}},"fileSizeString":"78.7 KB"},"transitionId":65709,"fileId":305886}],"infoText":"Closed out","infoTextExtra":"","dateText":"September 2012"}],"responsibleMd":{"acronym":"STMD","canUserEdit":false,"city":"","external":false,"linkCount":0,"organizationId":4875,"organizationName":"Space Technology Mission Directorate","organizationType":"NASA_Mission_Directorate","naorganization":false,"organizationTypePretty":"NASA Mission Directorate"},"program":{"acronym":"SBIR/STTR","active":true,"description":"
The NASA SBIR and STTR programs fund the research, development, and demonstration of innovative technologies that fulfill NASA needs as described in the annual Solicitations and have significant potential for successful commercialization. If you are a small business concern (SBC) with 500 or fewer employees or a non-profit RI such as a university or a research laboratory with ties to an SBC, then NASA encourages you to learn more about the SBIR and STTR programs as a potential source of seed funding for the development of your innovations.
The SBIR and STTR programs have 3 phases:
The SBIR and STTR Phase I contracts last for 6 months with a maximum funding of $125,000, and Phase II contracts last for 24 months with a maximum funding of $750,000 - $1.5 million.
Opportunity for Continued Technology Development Post-Phase II:
The NASA SBIR/STTR Program currently has in place two initiatives for supporting its small business partners past the basic Phase I and Phase II elements of the program that emphasize opportunities for commercialization. Specifically, the NASA SBIR/STTR Program has the Phase II Enhancement (Phase II-E) and Phase II eXpanded (Phase II-X) contract options.
Please review the links below to obtain more information on the SBIR/STTR programs.
Provides an overview of the SBIR and STTR programs as implemented by NASA
Provides access to the annual SBIR/STTR Solicitations containing detailed information on the program eligibility requirements, proposal instructions and research topics and subtopics
Schedule and links for the SBIR/STTR solicitations and selection announcements
Federal and non-Federal sources of assistance for small business
Search our complete archive of awarded project abstracts to learn about what NASA has funded
Still have questions? Visit the program FAQs
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