According to the teachings of the present invention, a system is provided which retains the versatility and benefits of reflective optics while eliminating {HEAD ~ the disadvantages} of {TAIL ~ refractive optical systems} 
According to the teachings of the present invention , a system is provided which retains the versatility and benefits of reflective optics while eliminating { HEAD ~ the disadvantages } of { TAIL ~ refractive optical systems }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL