Patent ID: 11940244
Assignee: CUBIC CORPORATION
Field: Optics (Instruments)
Classification: CPC F  G | IPC F  G

Claim 0:
1. An automatic zoom-sensing method for a riflescope display adapter (RDA), the method comprising:
illuminating an iris of a user with a beam from a light emitter;
activating a display comprising at least one graphical element visible by the user through an eyepiece;
focusing an image of the iris on a sensor;
determining a diameter of the iris from the image of the iris using an iris analyzer;
developing a calibration table that correlates the diameter of the iris to a zoom level of an optical scope;
estimating the zoom level of the optical scope from the diameter of the iris via the calibration table; and
adjusting, to match the zoom level, a font size of the at least one graphical element on the display.