Internal display for an optical device

A system comprising:

• an optical device;
• and
• an accessory device;
• the optical device comprising:
• a housing,
• an objective lens at a first end of the housing and supported by the housing,
• an ocular lens at a second end of the housing and supported by the housing, and
• an optical path defined from the objective lens through the housing to the ocular lens;
• a display device supported by the housing proximate the second end of the housing, the display device comprising:
• a display,
• hardware logic circuitry to process display data and to display the display data on the display,
• an input port, and
• a display holder to position the display in the optical path in the presence of a signal from the accessory device and to position the display out of the optical path in the absence of a signal from the accessory device;
• the accessory device coupled to the display device through the input port by a cable, the accessory device comprising:
• a power source to power the accessory device and the display device;
• and
• hardware circuitry to:
• receive display protocol information from the display device,
• configure display data based on the display protocol of the display device, and
• transmit the configured display data to the display device.

A method comprising:

• receiving, at a display device of an optical device, a first input signal from an accessory device;
• causing a display of the display device to move into an optical path of the optical device based on the first input signal;
• receiving, at the display device, a second input signal, the second input signal comprising information to be displayed;
• and
• displaying the information on the display.