INCREASED VERTICAL SEE-THROUGH IN A HEAD-WORN DISPLAY
Aspects of the present disclosure relate to solid optical systems and methods for use in head-worn computing systems, and optics for displaying images in head-worn display along with a see-through view of a surrounding environment that has an increased vertical see-through field of view.
1 . Optics for displaying images in head-worn display along with a see-through view of a surrounding environment that has an increased vertical see-through field of view, comprising:
an image source providing image light;
display optics including multiple elements with optical surfaces that are cemented together with one or more transparent adhesives to provide a solid display optic, wherein the solid display optic includes multiple internal optical surfaces comprising at least one refractive surface supplying optical power and at least two reflective surfaces; and
the solid display optic provides a uniform thickness across the multiple elements through which a user is provided a view of the surrounding environment that has a larger vertical see-through field of view than the vertical display field of view that is provided the solid display optic.
2 . The optics of claim 1 , wherein portions of the view of the surrounding environment are provided through all of the multiple elements.
3 . The optics of claim 1 , wherein the multiple elements include multiple elements made of materials with very similar refractive indices and at least one element made of a material with a different refractive index.
4 . The optics of claim 3 , wherein the materials with very similar refractive indices have indices within <0.05 of each other and the materials with a different refractive index is >0.05 of the other materials.
5 . The optics of claim 2 , wherein a first portion of the view of the surrounding environment passes through two or more of the elements and a second portion of the view of the surrounding environment passes through only one element.
6 . The optics of claim 1 , wherein the solid display optic has a uniform thickness through which a user views the see-through view of the surrounding environment.
7 . The optics of claim 6 , wherein the uniform thickness solid display optic provides an undistorted view of the surrounding environment to a user.
8 . The optics of claim 7 , wherein distortion in the view of the surrounding environment is less than 0.5 degree.
9 . The optics of claim 2 , wherein the image light passes through some, but not all of the elements.