Patent ID: 7256933

Claim:
An optical system which is independent of a telescope, for repositioning the focal plane of a focused image produced by the telescope from a point where it would conventionally be viewed by a user of the telescope, to a point where the focused image is to be viewed by a user of a remote viewing device used in combination with the telescope, the remote viewing device being of the type that has an image input portion for receiving the focused image and an image output portion at which the user can view the focused image, and a significant amount of lightpath therebetween, the independent optical system comprising: a first housing having first and second opposed ends, said first housing supporting therein a telenegative-type lens, and a second housing having first and second opposed ends, said second housing supporting therein a positive-type lens, wherein, the first end of the first housing is adapted to be coupled to said telescope in a manner so that the telenegative lens intercepts the image plane provided thereby, the first end of the second housing is adapted to be coupled to the image input portion of said remote viewing device, and the second end of the first housing and the second end of the second housing are adapted to be coupled to each other in a manner so that the distance between the telenegative lens in the first housing and the positive-type lens in the second housing results in the intercepted image plane being repositioned from the viewing position where it would conventionally be viewed by a user of the telescope, to a viewing position substantially increased therefrom and which is at the image output portion of the remote viewing device; and furthermore, wherein said independent optical system does not include the remote viewing device.