Photoresist Holographic Optical Elements on a Spherical Substrate for High Resolution Laser Scanning Applications.
Abstract
Theoretical and experimental study of a new type of laser scanner, a holographic scanner recording on a spherical substrate using photoresist technology, is undertaken in this dissertation. A material well-suited for recording holographic scanners and mass producing holograms is photoresist, because it possesses high resolution, high efficiency, tough physical properties and replication capability. Little information is available in the literature concerning the experimental technique, which has to be carefully controlled for optimum results. The work reported here establishes the detailed characteristics of the Shipley AZ-1450J photoresist for the recording of holographic optical elements. The modulation depth has been modeled and experimentally studied as a function of the various relevant parameters. As currently utilized in a variety of tasks in sampling, scanning, digitizing or reconstructing information, classical laser scanners suffer from several disadvantages. We have designed, constructed, and evaluated a new holographic laser scanner which should surmount some of the difficulties encountered by other systems. The new holographic scanner makes use of holographic optical elements (HOEs) on a spherical substrate using photoresist technology. Our scanner is bow-free and has the potential to produce aberration-free, high speed operation for information handling applications. Theoretical analysis is given and experimental verifications, including the spot size and wavefront measurements, are described.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- June 1985
- Bibcode:
- 1985PhDT........37K
- Keywords:
-
- Physics: Optics;
- High Resolution;
- Holography;
- Laser Applications;
- Photoconductors;
- Scanners;
- Hologrammetry;
- Optical Equipment;
- Substrates;
- Instrumentation and Photography