Omid
Well-known member
I know there are some very bright minds here so I thought I would reach out to my Bird Forum friends regarding this problem I am thinking about.
Assume that we use an objective lens to form an image of a distant object. We then add an erector system consisting of two relay lenses to form an up-right image on a screen (see drawing below). The problem is finding an "optical" way to shift this image up and down by a couple millimeters.
A first way I thought was to shift one of the relay lenses up to shift the image by the same amount.
A second way is to add a tilted glass window or a pair of wedge prisms as shown in the figure. The problem with this solution is it is going to add coma and astigmatism to the image.
What are your thoughts? Thank you for your help!
Assume that we use an objective lens to form an image of a distant object. We then add an erector system consisting of two relay lenses to form an up-right image on a screen (see drawing below). The problem is finding an "optical" way to shift this image up and down by a couple millimeters.
A first way I thought was to shift one of the relay lenses up to shift the image by the same amount.
A second way is to add a tilted glass window or a pair of wedge prisms as shown in the figure. The problem with this solution is it is going to add coma and astigmatism to the image.
What are your thoughts? Thank you for your help!
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