Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Laser marking process in an oriented dye film

Not Accessible

Your library or personal account may give you access

Abstract

A laser marking process is described which is based upon a unique phenomenon of photothermally transforming oriented microcrystallites of a vapor-deposited dichroic dye. It is shown that writing with linearly polarized laser light on an oriented film improves contrast and sensitivity over the unoriented film. The improvement stems from the increased optical sensitivity when an oriented film of one polymorphic form of the dye is photothermally transformed by irradiation with suitably oriented linearly polarized laser light. It is shown that the laser marking process proceeds via three stages. At low power the laser pulse causes a crystal-crystal transformation within microcrystallites of an oriented film of the dichroic dye. At medium power the dye also migrates and coalesces around nucleating sites in the written spot during the crystal transformation process. At the highest powers the unovercoated film ablates. A simple polishing process is described for producing large areas of oriented thin vapor-deposited films.

© 1984 Optical Society of America

Full Article  |  PDF Article
More Like This
Reversible laser marking process in anthraquinone dye films

A. H. Sporer
Appl. Opt. 26(7) 1240-1245 (1987)

Laser marking of thin organic films

Brian J. Bartholomeusz and Mool C. Gupta
Appl. Opt. 31(23) 4829-4833 (1992)

Laser recording on an overcoated organic dye—binder medium

Mool C. Gupta
Appl. Opt. 23(22) 3950-3953 (1984)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (11)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved