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. 2018 Nov 7;9(12):6017–6037. doi: 10.1364/BOE.9.006017

Table 7. Fixation target optical and opto-mechanical tolerances.

Element Radius
(%)
Diameter
(um)
Material
(index, Abbe #)
Irreg.
(waves)
Decenter
(µm)
Tilt
(arcmin)
Wedge
TIR (µm)
Thickness
(µm)
Airspace
(µm)
1 0.25/0.0 +0/-10 0.001, 0.8% 1.5/1.5 25 10.3 20 100 70
2 1.5/1.0 +0/-10 0.001, 0.8% 1.0/1.0 25 4.1 10 100 50
3 1.0/0.23 +0/-10 0.001, 0.8% 1.0/1.0 25 6.9 25 100 70
4 3.7/0.0 +0/-10 0.001, 0.8% 1.0/1.0 25 8.6 20 100 N/A