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Message: <blockquote data-quote="Omid" data-source="post: 3442764" data-attributes="member: 16724">Ah, now I get it: Since there is no clear one-to-one correspondence between the rays entering the eyepiece and the rays produced by the objective, we can not do some of the things that can be done in conventional binoculars. For example, the spherical aberrations produced by the objective may not be corrected by designing the eyepiece to cancel them. So, yes, there are some restrictions in a "decoupled" system that need to be considered. But, there are also some new degrees of freedom offered. For example, the FOFP can have a curved receiving surface and a curved emitting surface.  These surfaces can match the Petzval curvature of the objective and the eyepiece separately, giving an additional degree of freedom to the designer. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" />The handbook has a section on stereo vision but not on stereoscopes.  Hi Ron, This is not the proper forum to discuss telescopic sights so I won't comment in that direction any further. But, I hope you enjoyed reading my patent. This was my first patent application and I wrote it myself without any help from any lawyer or attorney! My best friend was (and still is) the book by David Pressman called Patent it Yourself. I learned a lot about intellectual property concepts while I was preparing it. I prosecuted the patent (responded to the examiner comments, etc.) also all by myself.  I have come a long way since I submitted this first patent in 2010. I am almost a professional inventor now!  <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" /> My fifth patent on optics was granted by the US Patent and Trademark Office this Tuesday! B <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" /></blockquote>

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