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Fabrication techniques for very fast diffractive lenses
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Marron, Joseph C. Tai, Anthony M. |
| Copyright Year | 1993 |
| Description | Aspheric lenses with arbitrary phase functions can be fabricated on thin light weight substrates via the binary optics fabrication technique. However, it is difficult and costly to fabricate a fast lens (f/number less than 1) for use as the shorter wavelengths. The pitch of the masks and the alignment accuracy must be very fine. For a large lens, the space-bandwidth product of the element can also become impractically large. In this paper, two alternate approaches for the fabrication of fast aspheric diffractive lenses are described. The first approach fabricates the diffractive lens interferometrically, utilizing a spherical wavefront to provide the optical power of the lens and a computer generated hologram to create the aspheric components. The second approach fabricates the aspheric diffractive lens in the form if a higher order kinoform which trades groove profile fidelity for coarser feature size. The design and implementation issues for these two fabrication techniques are discussed. |
| File Size | 310210 |
| Page Count | 8 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19940012872 |
| Archival Resource Key | ark:/13960/t6sz16x25 |
| Language | English |
| Publisher Date | 1993-08-01 |
| Access Restriction | Open |
| Subject Keyword | Optics Kinoform Holography Aspheric Optics Grooves Masks Substrates Wave Fronts Fabrication Alignment Asphericity Diffraction Computer Aided Design Lenses Interferometry Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
