| 摘要 |
A compact podium, of substantially conventional apperance, conceals therein a video camera and optical system. Illustrative materials, inserted into a slot at the speaker's waist, fall within the field of the camera after reflection from two mirrors. A two-way mirror serves as one reflector in the optical system and also as the sloped portion of the podium. The speaker looks through the two-way mirror and sees his illustrative material which is simultaneously displayed as a video picture. There is an unobstructed line of sight between the presenter and his audience.
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