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COORDENATE DETECTING APPARATUS FOR USE WITH OPTICAL PROJECTING APPARATUS BACKGROUND OF THE INVENTION 1. Field of the Invention
| Content Provider | Semantic Scholar |
|---|---|
| Copyright Year | 2017 |
| Abstract | A coordinate detecting apparatus for use with an opti cal projecting apparatus, which includes an illuminat ing light source for projecting an optically recorded medium, an illuminating optical system, a recorded medium support member, a projecting optical system and a screen, the coordinate detecting apparatus com prising light spot generating means including a cath ode-ray tube for generating the light spot to scan the screen on which an optical picture image is projected in a composed manner, a deflecting circuit and a com posite projecting optical system for generating a light spot and for projecting the same on the screen, photo electric detecting means for detecting the light spot on the screen, and coordinate position detecting means responsive both to the photoelectric detected output signal of the photoelectric detecting means and to the deflecting signal of the light spot generating means for detecting the coordinate position of the photoelectric detecting means on the screen. 4 Claims, 5 Drawing Figures |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://patentimages.storage.googleapis.com/36/1d/c0/2002dda511891f/US3917955.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Patent |
