Wedge shaped segments with 45 equal bar and space widths (8 degrees per cycle or 4 degrees per spoke) over a 360 degree circumference circle. Overall image size 50mm diameter. An ideal target for detecting Optical Astigmatism, Focus Errors and other aberrations. Can easily be incorporated into complete target arrays.
|Billable Weight:||2 lbs|
Chrome on OPAL
0.29 to 100 cy/mm
4.0 in. x 4.0 in. – 101.6mm x 101.6mm
45 equal bar and space widths (8° per cycle or 4° per spoke)