Sharp nose lens design using refractive index gradient

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dc.contributor.authorAmichai, Oded
dc.contributor.corporateOperations Research (OR)
dc.contributor.corporateGraduate School of Operational and Information Sciences (GSOIS)
dc.date1982-06
dc.date.accessioned2013-03-07T21:54:08Z
dc.date.available2013-03-07T21:54:08Z
dc.date.issued1982-06
dc.description.abstractFor infrared sensors located at the nose of a missile or a projectile, an age-old problem occurs. A conflict between optical quality and aerodynamic drag exists. A new approach for solving this problem is being developed using gradient refractive index, GRIN, for lens design. The equations for lens design incorporating GRIN are formulated for the special case of spherically symmetrical GRIN. A computer code for designing a GRIN lens and for determining aberrations has been developed. A different program (LENS) calculates lens design and lens performance for the case of homogeneous refractive index. Results of this program provide a check on the more complex program which includes GRIN. The computed program calculates the spot diagram for both meridianal and skew rays. The spot diagram, which is the intersection of rays with the focal plane, is plotted, and the Oj-j^g and centroid location of the spot diagram are calculated. Also a cumulative energy diagram is obtained from the program. The computer code has been organized to calculate the items enumerated above for either a circular cone for the inside or outside surface of the pointed lens. For homogeneous refractive index, both cases are included in the program discussed in this report. However, for the GRIN case, only the complete program for a lens with a conical surface on the outside is reported here. The alternate case is being developed by a thesis student. Features of the computer program include the following: use of many subroutines for clarity and for easy modification, and use of program structure for easy integration into an optimization code. Sample lens designs and lens performance are presented. The computer code provides the tools for lens design. Considerables additional work is needed for selecting the best lens design.en_US
dc.description.sponsorshipThe work reported herein was carried out for the Naval Postgraduate school by Dr. Oded Amichai under Contract Nuinber f0^2 8-81-C-H2 31. The work presented in this report is m support of the DARPA/AIFS project. The work is a continuation of earlier research efforts by several thesis students. An age-old problem is the conflict between optical quality and aerodynamic performance for infrared domes. The research may provide a means to circumvent the problem through use of gradient refractive index. The proiect on Navy Applications of AIFS is funded by Defense Advanced Reseat projects Agency and is under the cognizance of Professor A. E. Fuhs.en_US
dc.description.urihttp://archive.org/details/sharpnoselensdes00amic
dc.identifier.npsreportNPS67-82-003CR
dc.identifier.urihttps://hdl.handle.net/10945/30166
dc.language.isoen_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.subject.authorGuided projectilesen_US
dc.subject.authormissile opticsen_US
dc.subject.authorprecision guided munitionsen_US
dc.subject.authorinfrared opticsen_US
dc.subject.authorgunsen_US
dc.subject.authorgun launched ramjeten_US
dc.subject.authorsensorsen_US
dc.subject.lcshGUIDED PROJECTILESen_US
dc.titleSharp nose lens design using refractive index gradienten_US
dc.typeTechnical Reporten_US
dspace.entity.typePublication
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relation.isOrgUnitOfPublicationdd7f1b97-9c92-402d-b910-27f080946cde
relation.isOrgUnitOfPublication.latestForDiscoverydd7f1b97-9c92-402d-b910-27f080946cde
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