Loading patent…
AssigneeHoneywell Inc.
InventorsGeorge O. Reynolds, Donald A. Servaes
Estimating the term…
A method and apparatus are disclosed for correcting complex phase aberrations in a thick window in an airborne vehicle using the technique of phase conjunction. A conjugate element of the window is fabricated by machining. The conjugate element and an imaging lens are positioned behind the window such that the window is imaged onto the conjugate element. Phase aberrations produced when broadband radiation is passed through the window are removed when the wavefront passes through the imaging lens and conjugate element. In another embodiment, halogram is prepared of the wavefront passing through the window. The spatial phase information encoded in the hologram is read out by a phase measurement system and then fed into a computer where the conjugate wavefront is calculated. The conjugate wavefront is then written into a thin corrector plate of refractive material. The corrector plate with the conjugate wavefront imprinted thereon is then placed at the location where the hologram was initially formed. Phase aberrations produced when broadband radiation is passed through the window are removed when the wavefront passes through the plate. In another embodiment, the hologram is made of the conjugate element and imaging lens as positioned behind the window for phase aberration correction purposes instead of the window itself.
A method of removing complex phase aberrations in a window comprising the steps of:
A method of making a flat plate corrector for correcting complex phase aberrations in a window comprising the steps of:
A corrector for use in correcting phase aberrations in a window comprising a flat body of material having imprinted thereon the conjugate wavefront obtained from a hologram made based on the aberrations of the window, the corrector being mounted on one side of the window to remove the aberrations when a scene is viewed therethrough with incoherent light.
A method of correcting complex phase aberrations in an optical surface comprising:
Apparatus for use in preparing a corrector plate on either refractive or reflective material containing the conjugate wavefront needed to correct complex phase aberrations in a scene being viewed through an optical surface with incoherent light using a hologram prepared based on the wavefront created by said surface comprising:
A system for removing phase aberrations in a scene being viewed with incoherent light through a thick window comprising:
Dependencies are inferred from the claim text.