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 |
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 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 |
Pupil Mount |
4 |
na |
na |
na |
90.0000 |
0.0000 |
90.0000 |
na |
na |
na |
-0.0186 |
0.0000 |
-0.0272 |
Grating Mount |
4 |
na |
na |
na |
90.0000 |
55.0000 |
35.0000 |
na |
na |
na |
0.0186 |
0.0454 |
-0.0451 |
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 |
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 |