Notes on applying glue to glass pieces
  1. Use small dispenser (3cc barrels) and 22 gauge needle. Break point off needle by bending it back and forth with pliers.
  2. Use slow (blue) Araldite.
  3. Air bottle output pressure should be about 50 psi.
  4. Glue dispenser pressure should be about 15 to 25 psi.
  5. Place mixed epoxy in barrel, add white plastic piston and push down with a stick.
  6. Thoroughly clean the inside of the end of the barrel and put on the air hose.
  7. Glue is dispensed using the foot pedal.
  8. Glue bead should be toward the outer edge of the top and bottom shelves of the glass piece.
  9. Hold needle just above the surface of the glass. The size of the bead should be very close to the size as it comes out of the needle, not stretched or compressed. It may help to hold the needle so it points roughly perpendicularly to the length of the glass piece. A GPL/H bead dispenses in about 1 minute.
  10. Don’t forget to take the barrel off of the glue dispenser when you are done. Check O-ring on dispenser for any epoxy residue.

 

Notes on inspecting and reinforcing glue joints
  1. Place transport box upside down and remove bottom cover.
  2. Check glue line on the sensor and the hybrid edges.
  3. Check that gold pads on bottom of hybrid aren’t blocked by glass piece or glue.
  4. Use fast Araldite (red).
  5. Put 3 to 4 drops (~ 1 mm) of glue into corner where glass meets hybrid and where glass meets sensor. Be careful that glue doesn’t flow too far onto sensor and doesn’t cover gold pads on the hybrid.

 

Notes on changing gluing stating jigs
  1. Remove scope and install feeler gauge in its place
  2. Remove installed hybrid and sensor jigs
  3. Install new sensor jigs first, vacuum hose connections point out
  4. Check height of sensor jigs at several points, especially near the corners. They must be level and the two jigs must be at equal height to better than 10 microns.
  5. Install hybrid jig, adjustment screw that pushes on hybrid goes on front left side.
  6. Check height of jig at several places in the region where the hybrid sits. It should be level to better than 10 microns.
  7. Check height of hybrid jig relative to sensor jigs. The difference should be XXX.