Optical device alignment methods

A method for aligning an image sensor with an optical device, the method comprising:

• mechanically coupling at least one component of the optical device to a mechanical assembly at a known orientation, the mechanical assembly having a test pattern at a known orientation;
• moving the image sensor to a first location prior to capturing an image of the test pattern;
• capturing the image of the test pattern when the image sensor is positioned at the first location in which the image sensor is aligned with the test pattern;
• analyzing the captured image to determine an estimated orientation of the test pattern;
• adjusting an orientation parameter of the image sensor based on a comparison between the known orientation of the test pattern and the estimated orientation of the test pattern;
• and
• moving the image sensor to a second location after capturing the image of the test pattern.

A method for aligning an image sensor with an optical device that includes at least a display source, an illumination module, an illumination prism assembly, and a collimating prism assembly, the method comprising:

• mechanically coupling at least one component of the optical device to a mechanical assembly at a known orientation, the mechanical assembly having a test pattern at a known orientation;
• capturing an image of the test pattern when the image sensor is positioned at a first location in which the image sensor is aligned with the test pattern;
• analyzing the captured image to determine an estimated orientation of the test pattern;
• adjusting an orientation parameter of the image sensor based on a comparison between the known orientation of the test pattern and the estimated orientation of the test pattern;
• aligning the illumination module and the display source with the illumination prism assembly such that light waves emitted by the illumination module arrive at the display source via the illumination prism assembly;
• displacing the display source along a displacement axis to adjust a distance between the display source and the collimating prism assembly;
• and
• translationally moving, in unison, the display source, the illumination prism assembly, and the illumination module in a plane normal to the displacement axis.