578
edits
Changes
Jump to navigation
Jump to search
Line 1:
Line 1: − '''Overview'''+ − '''Procedures'''+ − + − ''Light guide fibers''+ + − * The light guide is now ready to polish. Line 21:
Line 21: − ''Scintillating fibers''+ + Line 39:
Line 40: − ''Polishing''+ Line 45:
Line 46: − + − ** Take the collar apart and put the polished fibers to the side. − ** The individual fiber will be polished with an individual polishing puck. The puck is designed to keep the fiber perpendicular to the page so as to achieve a square polish. However, polishing in collars does this better, and is therefore the preferred way to polish. The individual polishing puck should only be used when necessary. Line 58:
Line 57: − ''Individual polishing puck''+ − * If, while polishing in the collars, one or more of the fibers does not seem to be making contact with the paper, continue polishing the bundle until the other fibers are polished, take the collar off, and use the individual polishing puck on the non polished fibers.+ − ** Put the side to be polished through the single square hole in the individual polishing puck.+ − ** With the side to be polished protruding the slightest bit (about .5 mm), hand tighten down the screw that holds the fiber in place. + + + − + − ** Put the now polished fibers with the rest of the polished bundle, label it, and put it in the intermediate storage box, polished side to the left.+ − [[File:JK Individual Polishing Puck.JPG|thumb|center|The individual polishing puck with a fiber protruding about .5 mm.]]+ +
no edit summary
==Overview==
The non fused ends of each fiber must be polished to a mirrored finish. This allows the greatest amount of light transmission through the end of the fiber. Fibers are polished in their appropriate collars, SciFis in their 6x6 collar and light guides in their 5x6 collar. Polishing bundled fibers in their collars affords a number of advantages, the main ones being square fiber ends and minimal cladding flaring. Because the fibers are polished in their collars, it is important that the fiber ends are flush with one another. The scintillating fibers are easily made flush in their collar, but with light guides it is not so easy. For this reason, the light guides are polished as soon as they are returned from end-milling and while they are still in their collars.
The non fused ends of each fiber must be polished to a mirrored finish. This allows the greatest amount of light transmission through the end of the fiber. Fibers are polished in their appropriate collars, SciFis in their 6x6 collar and light guides in their 5x6 collar. Polishing bundled fibers in their collars affords a number of advantages, the main ones being square fiber ends and minimal cladding flaring. Because the fibers are polished in their collars, it is important that the fiber ends are flush with one another. The scintillating fibers are easily made flush in their collar, but with light guides it is not so easy. For this reason, the light guides are polished as soon as they are returned from end-milling and while they are still in their collars.
==Pre-Polishing Procedures==
* Clean the table that you will be polishing fibers on. Any dust, sand, or dirt on the table will translate through the paper and scratch the fibers.
* Clean the table that you will be polishing fibers on. Any dust, sand, or dirt on the table will translate through the paper and scratch the fibers.
* Set out 2-4 pieces of clean copier paper in a stack, and tape them to the table on each corner.
* Set out 2-4 pieces of clean copier paper or index card paper in a stack, and tape them to the table on each corner.
[[File:JK Polishing Setup.JPG|thumb|center|Copier paper is used to polish the fibers.]]
[[File:JK Polishing Setup.JPG|thumb|center|Copier paper is used to polish the fibers.]]
===Light Guide Fibers===
* Don a pair of gloves.
* If polishing recently end-milled light guides, find the side that has the most fibers flush with one another. This is the side you will polish.
* If polishing recently end-milled light guides, find the side that has the most fibers flush with one another. This is the side you will polish.
** Note: the end-milling process cuts the fibers about .5 mm from the end of the collar. This half of a millimeter protrusion of fibers will allow the fibers to make contact with the paper instead of the aluminum collar, allowing the fibers to be polished. This protrusion is an artifact of the end-milling process, and should be taken full advantage of.
** Note: the end-milling process cuts the fibers about .5 mm from the end of the collar. This half of a millimeter protrusion of fibers will allow the fibers to make contact with the paper instead of the aluminum collar, allowing the fibers to be polished. This protrusion is an artifact of the end-milling process, and should be taken full advantage of.
** Remove the collar from the end of the fibers that is not being polished.
** Remove the collar from the end of the fibers that is not being polished.
* Place the collar square on the paper and support the other end of the light guide fibers by holding them above your head for the entirety of the polishing process.
* Place the collar square on the paper and support the other end of the light guide fibers by holding them above your head for the entirety of the polishing process.
{|style="margin: 0 auto;"
{|style="margin: 0 auto;"
|}
|}
===Scintillating Fibers===
* Don a pair of gloves.
* If polishing scintillating fibers, select the bag from the dark box with the bundle of fibers to be polished.
* If polishing scintillating fibers, select the bag from the dark box with the bundle of fibers to be polished.
* Determine which end of the fibers has the flattest end-mill cut. This is the side that will be polished.
* Determine which end of the fibers has the flattest end-mill cut. This is the side that will be polished.
|}
|}
==Polishing==
* Begin making small circular movements with the collar on the paper while applying even pressure downwards.
* Begin making small circular movements with the collar on the paper while applying even pressure downwards.
* After a while the paper will become smooth and its polishing properties will decrease. When this occurs start to slowly move to another portion of the paper.
* After a while the paper will become smooth and its polishing properties will decrease. When this occurs start to slowly move to another portion of the paper.
** Note: Maintain at least two (and no more than four) sheets of paper on the table at a time. Too few or too many sheets can result in possible cladding damage.
** Note: Maintain at least two (and no more than four) sheets of paper on the table at a time. Too few or too many sheets can result in possible cladding damage.
* Continue polishing until a mirrored surface is achieved.
* Continue polishing until a mirrored surface is achieved.
* If a fiber slips in the collar and is no longer flush with the other fibers it may need to be polished individually.
* If a fiber slips in the collar and is no longer flush with the other fibers it may need to be polished individually using the [http://zeus.phys.uconn.edu/wiki/index.php?title=Fiber_Polishing_Procedure&action=submit#Individual_polishing_puck Individual Polishing Puck].
** If this is the case, continue polishing until the other fibers in the bundle are polished.
** If this is the case, continue polishing until the other fibers in the bundle are polished.
* After a mirror finish is achieved for an entire bundle, it should be labeled and put in the appropriate area of the intermediate storage box.
* After a mirror finish is achieved for an entire bundle, it should be labeled and put in the appropriate area of the intermediate storage box.
** Polished ends of light guides should all face to the left in the dark box as consistent storing of polished fibers helps to save time during the fusing process.
** Polished ends of light guides should all face to the left in the dark box as consistent storing of polished fibers helps to save time during the fusing process.
|}
|}
===Individual polishing puck===
If, while polishing in the collars, one or more of the fibers does not seem to be making contact with the paper, continue polishing the bundle until the other fibers are polished. The individual polishing puck does not create as good as a polish as is created when polishing a bundle, so only use the individual polishing puck as a last resort.
[[File:JK Individual Polishing Puck.JPG|thumb|left|The individual polishing puck with a fiber protruding about .5 mm.]]
* Remove the fibers you need to polish individually from the bundle.
* Put the side to be polished through the single square hole in the individual polishing puck.
* With the side to be polished protruding the slightest bit (about .5 mm), hand tighten down the screw that holds the fiber in place.
** Adjust the side screws until the fiber is perpendicular to the base of the polishing puck.
** Adjust the side screws until the fiber is perpendicular to the base of the polishing puck.
** A very small protrusion and a perpendicular fiber help endure that rounded edges are kept to a minimum and the fiber has a square polished face.
** A very small protrusion and a perpendicular fiber help endure that rounded edges are kept to a minimum and the fiber has a square polished face.
** While polishing be sure to support the rest of the fiber so that it does not kink.
* Apply less pressure on the individual polishing puck than you used to polish a bundle. Too much pressure can bend or break the fiber.
* Continue to polish using small circles. Check the fiber end frequently as the time required to polish one fibers is much less than the time required to polish an entire bundle.
* While polishing, be sure to support the rest of the fiber so that it does not kink.
* Put the now polished fibers with the rest of the polished bundle, label it, and put it in the intermediate storage box, polished side to the left.