A Computer Aided Method for the Measurement of Fiber Diameters by Laser Diffraction
Abstract
This thesis investigates the computer aided measurement of fiber diameters by laser diffraction. The proposed system consists of a light sensitive Random Access Memory (RAM) chip which collects light intensity data from the laser diffraction pattern. Measurements of the spatial location of the nodes of the diffraction pattern enables the calculation of the fiber diameter. These measurements may be performed manually which is tedious and requires subjective judgement of the nodes. The alternative method of direct processing of the intensity pattern was investigated. Simulation is conducted to examine the feasibility of this method. Results show such a system to be capable of providing one order of magnitude greater accuracy than optical microscopy measurements (with a shearing eyepiece) and double the accuracy of manual laser diffraction methods with the added advantage of permitting the option of total computer automation in data interpretation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1986
- Accession Number
- ADA176092
Entities
People
- Mark G. Storch
Organizations
- Naval Postgraduate School