Non-retro-reflective imaging using tilted image planes

A method of non-retro-reflective imaging in an optical imaging system comprising:

• receiving electromagnetic radiation representing a source image;
• focusing the electromagnetic radiation onto a tilted image plane having a surface normal that is tilted with an angle of rotation relative to an optical axis of the optical imaging system;
• producing a substantially in-focus image at the tilted image plane using an imaging sensor co-aligned with the tilted image plane;
• and
• selectively filtering rays of the electromagnetic radiation that would be normally incident on the tilted image plane to prevent the rays from reaching the tilted image plane.

A non-retro-reflective imaging system comprising:

• at least one optical element configured to receive electromagnetic radiation and to focus the electromagnetic radiation onto a tilted image plane having a surface normal that is tilted with a tilt angle relative to an optical axis of the imaging system;
• an imaging sensor co-aligned with the tilted image plane and configured to produce an in-focus image from the electromagnetic radiation;
• and
• a Fourier filter positioned in a Fourier plane of the at least one optical element and configured to block rays of the electromagnetic radiation that would be normally incident on the imaging sensor from reaching the image sensor, a position of the Fourier filter in the Fourier plane being determined by the tilt angle of the tilted image plane.