Structural Alignment Data

Mechanical Metrology

All measurements were taken with a Faro Arm Platinum (S/N: TBD). The values below are the average of the total measurements taken. See excel worksheet for individual measurements.

  • Units = inches, degrees
  • Coordinate System = As defined in MMDN3404 section 2.1.1
  • N = Total number of measurements taken
  • X, Y, Z, Alpha, Beta, Gamma = Nominal coordinates taken from MMDN3404 which are based on the MOSFIRE CAD model
  • Alpha = the angle between the X axis and the surface normal
  • Beta = the angle between the Y axis and the surface normal
  • Gamma = the angle between the Z axis and the surface normal
  • d(coordinate) = (Nominal Value) - (Measured Value)

Surface N X Y Z Alpha Beta Gamma dX dY dZ d(Alpha) d(Beta) d(Gamma)
CSU 2nd Pin 8 19.6850 -15.7480 0.0000 na na na 0.0007 -0.0005 0.0000 na na na
Field Lens Mount 2 9.8425 -7.8740 -16.5933 90.0000 90.0000 180.0000 0.0035 0.0091 -0.0056 0.0029 0.0000 0.0000
FCS Mirror 3 9.8425 -7.8740 -16.5933 90.0000 72.5000 17.5000 -0.0089 0.0069 -0.0019 0.0210 -0.0524 0.0478
Pupil Mount 4 na na na 90.0000 0.0000 90.0000 na na na -0.0186 0.0000 -0.0272
1st Pupil Pin 3 9.8425 8.7093 -5.2624 na na na -0.0023 0.0015 -0.0021 na na na
2nd Pupil Pin 3 9.8425 8.7093 -1.7624 na na na -0.0015 -0.0002 -0.0025 na na na
Grating Mount 4 na na na 90.0000 55.0000 35.0000 na na na 0.0186 0.0454 -0.0451
Grating Pin 3 10.8288 13.7680 5.3136 na na na -0.0048 -0.0008 -0.0016 na na na
Grating Slot 3 10.8288 na na na na na -0.0024 na na na na na
Grating Mirror 3 9.8389 20.4652 2.9501 110.0000 122.6146 140.3315 -0.0018 0.0120 -0.0190 -0.0872 -0.0452 0.0987
Grating Grating 2 9.8394 20.4718 2.9595 132.6142 114.9680 127.0734 -0.0728 0.0115 0.0097 1.0622 -0.4266 -0.7551

Optical Metrology

All measurements were taken with a Brunson 2022 Alignment Scope (S/N: TBD). The values below are the average of the total measurements taken. See excel worksheet for individual measurements.

  • Units = inches, degrees
  • Coordinate System = As defined in MMDN3404 section 2.1.1
  • N = Total number of measurements taken
  • Orientation = The orientation of the optical axis wrt to gravity
  • X = the relative distance between the scopes reticle and the cross-hair target in the X coordinate
  • Y = the relative distance between the scopes reticle and the cross-hair target in the Y coordinate
  • Z = the relative distance between the center of the scopes reticle and the center of the cross-hair target in the Z coordinate
  • Alpha = ARCTAN[X/Z]
  • Beta = ARCTAN[Y/Z]

Target N Orientation X Y Z Alpha Beta
Collimator Entrance 3 parallel -0.0089 0.0064 65 0.0057 -0.0079
Collimator Entrance 3 perpendicular -0.0089 0.0064 65 0.0057 -0.0079
Collimator Exit 3 parallel -0.0139 0.0118 75.25 0.0089 -0.0106
Collimator Exit 3 perpendicular -0.0139 0.0118 75.25 0.0089 -0.0106
Camera Entrance 1 parallel 0.0100 >0.050 110.5 0.0052 >0.0259
Camera Exit 1 parallel >0.050 >0.050 127.25 >0.0225 >0.0225

  • Units = degrees
  • LOS Error = (Angle@Exit) - (Angle@Entrance)
  • 1 Sigma = the standard deviation of the total measurements

Sub-Assy Orientation Alpha LOS Error Alpha 1 Sigma Beta LOS Error Beta 1 Sigma
Collimator parallel 0.0033 +/- 0.0027 -0.0027 +/- 0.0011
Collimator perpendicular 0.0033 +/- 0.0027 -0.0027 +/- 0.0011
Camera parallel >0.0225 na >0.0225 na
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Topic revision: r1 - 2009-08-05 - JasonFucik
 
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