FIELD-OF-VIEW INDICATOR, AND OPTICAL SYSTEM AND ASSOCIATED METHOD EMPLOYING THE SAME

摘要

A field-of-view indicator (110) for use with a viewing device (106) provides a user (102) of the viewing device with a visible indication of a status or event. The viewing device is used by a user to view an image of a scene (104). An indicator mechanism (110) is operable to display an indication to the user in at least a portion of the image. The indicator mechanism is located in a position such that, while viewing the image of the scene with the viewing device, the user does not view an image of the indicator mechanism. When not activated, the indicator mechanism does not block a portion of the user's view of the image of the scene. The indication may be a change in one of color and brightness of the portion of the image. A plurality of indications may be provided using one or more colors, flash rates, duty cycles, and intensities.