DX Testing of Vignetting on LUCI2

18:50 WUnit powered on
  • LUCI running
  • N3.75 Camera
  • No Mask
  • HKSpec/Clear
  • 2.5 sec Exp time
  • LBC in beam, neither tertiary nor secondary deployed (unlike images from luci2.20171027.0418.fits)

18:56
  • 20171030.0001.fits Not parallel light so see vignetting at blob rather then defined
    • Stages -70, -50, 50
  • 20171031.0001 shade did not move
    • -30, -50, 50
  • 02 lower right half of image shaded
    • -30 -20 50
  • 03 all lower half of image shaded, moved higher
    • -30 0 50
  • 04 lower shading almost gone, only block shading
    • -30 -30 50
  • 05 lower shading gone, only block shading
    • -30 -50 50
  • 06 only block shading Same as Y=-50
    • -30 -60 50
  • 07 only block shading Same as z=50, Rakich laser off (Still ~55000 counts in background? Chamber lights?)
    • -30 -60 30
  • 08 only block shading Same as z=50, Rakich laser off (Still ~55000 counts in background? Chamber lights?)
    • -30 -60 0
  • 09 only block shading Same as x=-30, Rakich laser off (Still ~55000 counts in background? Chamber lights?)
    • 0 -60 0
  • 10 only block shading
    • 0 -30 0
  • 11 only block shading
    • 0 -20 0
  • 12 only block shading
    • 0 -10 0
  • 13 block shading and a bit of shading along the bottom edge
    • 0 0 0
  • 14 block shading and shading along the bottom edge move up
    • 0 0 30
  • 15 block shading and shading along the bottom edge move up more
    • 0 0 50
  • 16 block shading and shading along the bottom edge now moves right
    • -30 0 50
  • 17 block shading and shading along the bottom edge now moves right
    • -50 0 50
  • 18 block shading and shading along the bottom edge now moves right
    • -70 0 50
  • 19 block shading and shading along the bottom edge completely gone
    • -70 0 0
  • 20 block shading and small strip of shading along the bottom edge
    • -70 -20 50
  • 21 block shading and shading along the bottom edge completely gone
    • -70 -40 50

19:35 Power on RetroCube linear and rotation stages
  • 22 cube stage shadow behind block shade, which did not move
    • -65 mm (away), 181 degrees
  • 23 cube stage shadow behind block shade, which did not move
    • -4.4 mm (nominal), 181 degrees
  • 24 cube stage shadow GONE!, block shade still stationary
    • -4.4 mm (nominal), 211 degrees
  • 25 cube stage shadow back but angle the opposite direction of 181, block shade still stationary
    • -4.4 mm (nominal), 241 degrees
  • 26 cube stage shadow back but flat. The worst vignetting yet, block shade still stationary
    • -4.4 mm (nominal), 271 degrees
  • 27 cube stage shadow back. Even worse. Looks like finger screw is adding to the vignetting. block shade still stationary
    • -4.4 mm (nominal), 301 degrees
  • 28 cube stage shadow back. Same as 26 (271). block shade still stationary
    • -4.4 mm (nominal), 331 degrees
  • 29 cube stage shadow back, angled. Same as 23 but a bit higher. block shade still stationary
    • -4.4 mm (nominal), 361 degrees
  • 30 cube stage shadow back, flat. Same as 23, at same level and flat. block shade still stationary
    • -4.4 mm (nominal), 391 degrees
  • 31 cube stage shadow GONE!, block shade still stationary
    • -4.4 mm (nominal), 211 degrees
  • 32 cube stage shadow GONE!, block shade still stationary
    • -65 mm (away), 211 degrees

19:52 Cube stage left at BEST position (rotation), Bayside stages left at nominal, WUnit Powered off
  • LUCI2 blind/blind

-- %USERSIG{DougMiller - 2017-10-30}%
Topic revision: r1 - 30 Oct 2017, DougMiller
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