Lens-based optical window with intermediate real image

摘要

A selectably transmissive internally focused intermediate image lens and a lens based optical window include a number of such lenses. Each selectably transmissive internally focused intermediate image lens in a lens based optical window includes a first and second lens portion. The first lens portion receives light and focuses it into a focused image at a focal plane that is coplanar with a second side of the first portion. A second lens portion has an image side adjacent to the second side of the first lens portion and an opposite side opposite the image side. The second lens portion refracts the focused image as an image projected through its rear side. Each lens further includes a selectably transmissive shutter that is located at the internal focal plane and that is controllable to block at least a portion of light passing therethrough.

主权项

1. A selectably transmissive internally focused intermediate image lens array, comprising:
a plurality of selectably transmissive internally focused intermediate image lenses, each selectably transmissive internally focused intermediate image lens in the plurality of selectably transmissive internally focused intermediate image lenses comprising:
a respective first lens portion comprising a Gradient Index (GRIN) lens that extends from a respective first side to a respective internal focal plane and receiving incoming light through the respective first side and focusing the incoming light into a respective focused image on the respective internal focal plane, the respective internal focal plane being coplanar with a respective second side of the respective first lens portion, the respective second side being opposite the respective first side;a respective second lens portion comprising a respective image side and a respective rear side,
the respective rear side opposite the respective image side,the respective image side being adjacent to the respective second side of the respective first lens portion,the respective second lens portion refracting a projection of the respective focused image through the respective rear side; anda respective selectably transmissive shutter located adjacent to the respective second side of the respective first lens portion and in the respective internal focal plane, the respective selectably transmissive shutter controllable to block at least a portion of light passing therethrough.