Fast Acting Optical Beam Deflection System
Abstract
This report describes the results of a study of the nature of optical deflection in the wave length range of 300-1000 nm, using transmission gratings of two different surface relief profiles, i.e., blazed saw-toothed and phase sinusoidal types. The experimental results confirm the theoretical predictions and provide a quantitative comparison of the performances of the two profiles. An analysis of results leads to the recommendation of the sinusoidal profile in preference to the blazed (saw-toothed) gratings. A broad-band high attenuation across the optical to near infrared frequencies may be achieved by the use of 'cross grating' structure with sinusoidal profile of judicious groove depth. Of the four usable sinusoidal gratings provided by the Cambridge Consultants Ltd., the quality of the two photoresist grating materials was found to be superior to that of synthetic fused silica (hard etched).
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 08, 1990
- Accession Number
- ADA220186
Entities
People
- Dilip K. Das-Gupta
Organizations
- Bangor University