NOTE: This item is not available outside the Texas A&M University network. Texas A&M affiliated users who are off campus can access the item through NetID and password authentication or by using TAMU VPN. Non-affiliated individuals should request a copy through their local library's interlibrary loan service.
Determination of energy thresholds on an artificial retina using a multiple-pulsed laser
| dc.creator | Stephenson, Albert David | |
| dc.date.accessioned | 2012-06-07T22:57:45Z | |
| dc.date.available | 2012-06-07T22:57:45Z | |
| dc.date.created | 1999 | |
| dc.date.issued | 1999 | |
| dc.identifier.uri | https://hdl.handle.net/1969.1/ETD-TAMU-1999-THESIS-S735 | |
| dc.description | Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item. | en |
| dc.description | Includes bibliographical references (leaves 48-49). | en |
| dc.description | Issued also on microfiche from Lange Micrographics. | en |
| dc.description.abstract | This study is focused on determining single and multiple pulse ED₅₀ for laser pulses of 200 ns duration. Energy thresholds in this experiment were determined on an artificial retina, for a variety of pulse widths and spot sizes. Due to numerous biological processes occurring within the eye, threshold values are difficult to ascertain. In an effort to eliminate the biological component a piece of exposed camera film was used as the artificial retina. Presently there are no safety standards that specify allowable exposure for pulses shorter than 1 nanosecond in duration, but current safety standards provide for a decrease in the maximum permissible exposure (MPE) per pulse for exposure to repetitive pulse laser irradiation. The degree of decrease for pulses of duration less than 10 []s can be determined by multiplying the single pulse MPE by a correction factor, C. An empirical relationship has been derived which equates the ED₅₀/pulse in a pulse train to the ED₅₀ for a single pulse and the member of pulses in the pulse train. | en |
| dc.format.medium | electronic | en |
| dc.format.mimetype | application/pdf | |
| dc.language.iso | en_US | |
| dc.publisher | Texas A&M University | |
| dc.rights | This thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries in 2008. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use. | en |
| dc.subject | health physics. | en |
| dc.subject | Major health physics. | en |
| dc.title | Determination of energy thresholds on an artificial retina using a multiple-pulsed laser | en |
| dc.type | Thesis | en |
| thesis.degree.discipline | health physics | en |
| thesis.degree.name | M.S. | en |
| thesis.degree.level | Masters | en |
| dc.type.genre | thesis | en |
| dc.type.material | text | en |
| dc.format.digitalOrigin | reformatted digital | en |
Files in this item
This item appears in the following Collection(s)
-
Digitized Theses and Dissertations (1922–2004)
Texas A&M University Theses and Dissertations (1922–2004)
Request Open Access
This item and its contents are restricted. If this is your thesis or dissertation, you can make it open-access. This will allow all visitors to view the contents of the thesis.