Patent ID: 7099077

Claim:
An all-reflective optical system comprising: an all-reflective afocal module having a first optical end of the afocal module and a second optical end of the afocal module, wherein the afocal module has a non-unity magnification between the first optical end and the second optical end; an all-reflective imaging module having an input optical end and an output optical end; and an all-reflective switching structure operable to direct a light beam through the afocal module and the imaging module, wherein a first position of the switching structure directs the light beam to enter the first optical end of the afocal module and exit the second optical end of the afocal module, and thereafter to enter the input optical end of the imaging module and to exit the output optical end of the imaging module, and a second position of the switching structure directs the light beam to enter the second optical end of the afocal module and to exit the first optical end of the afocal module, and thereafter to enter the input optical end of the imaging module and to exit the output optical end of the imaging module.