ROBUST OPTICS FOR A HEAD-WORN DISPLAY
Aspects of the present disclosure relate to solid optical systems and methods for use in head-worn computing systems. An optical assembly may include multiple elements that are aligned relative to one another and then adhesively bonded together to preserve the alignment in an adhesively bonded optic, wherein the adhesively bonded optic includes at least one internal refractive surface and two or more internal reflective surfaces, and wherein the internal partially reflective surfaces comprise partially reflective surfaces that are protected by other elements in the adhesively bonded optic
1 . Robust optics for a head-worn display, comprising
an optical assembly comprised of multiple elements that are aligned relative to one another and then adhesively bonded together to preserve the alignment in an adhesively bonded optic, wherein the adhesively bonded optic includes at least one internal refractive surface and two or more internal reflective surfaces, and wherein the internal partially reflective surfaces comprise partially reflective surfaces that are protected by other elements in the adhesively bonded optic.
2 . The robust optics of claim 1 , wherein the adhesively bonded optic comprises a pre-assembled optic that is installed and affixed into a frame of the head-worn display.
3 . The robust optics of claim 2 , further comprising an image source that is aligned relative to the adhesively bonded optic.
4 . The robust optics of claim 3 , wherein the frame aligns the adhesively bonded optic and the image source relative to a user's eye to display an image to the user's eye.
5 . The robust optics of claim 4 , comprises two adhesively bonded optics and two image sources in a frame to display images to both of the user's eyes.
6 . The robust optics of claim 1 , further comprising a corrective ophthalmic element in a holder that rigidly clips to the edges of the adhesively bonded optic.
7 . The robust optics of claim 1 , further comprising a corrective ophthalmic element that is adhesively bonded to the back surface of the adhesively bonded optic.
8 . The robust optics of claim 1 , wherein the adhesively bonded optic further comprises at least three internal refractive surfaces with an airgap between two of the refractive surfaces.
9 . The robust optics of claim 8 , further comprises a special flange associated with one of the elements that positions the element in relation to one or more adjacent elements and also seals the edges of the airgap thereby preventing dust from entering the airgap.
10 . The robust optics of claim 1 , wherein one of the internal partially reflective surfaces is protected by a glass element.
11 . The robust optics of claim 10 , wherein at least one of the internal partially reflective surfaces is a notch mirror associated with a surface of the glass element.
12 . The robust optics of claim 1 , wherein the multiple elements at least include four elements.
13 . The robust optics of claim 8 , wherein the multiple elements at least include five elements.
14 . The robust optics of claim 1 , wherein the adhesively bonded optic has a uniform thickness
15 . The robust optics of claim 14 , wherein the head-worn display displays an image to a user's eye and the user simultaneously receives a see-through view of a surrounding environment by looking through the adhesively bonded optic.