Referring to FIG 2, the linear motion of a microscope slide 2 and {HEAD ~ the limited rotary motion} of an oscillating arm 19 carrying {TAIL ~ lens} 18 are depicted 
Referring to FIG 2 , the linear motion of a microscope slide 2 and { HEAD ~ the limited rotary motion } of an oscillating arm 19 carrying { TAIL ~ lens } 18 are depicted
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH