| 摘要 |
PURPOSE:To attain correspondence among a teacher and many students in a classroom, for example, by aiming at the application of such as an overhead projector, and mounting the adaptor on a set. CONSTITUTION:A main body A is provided with a keyboard K, display body D, and a power switch SW or the like. Further, a light emitting section L and a photodetecting section P for optical communication are provided respectively. An optical communication projector X is provided on a set (pocket computer) S0 of a teacher P0. The projector receives an optical data from the S0 at an optical transmission/reception unit LP1, transmits it to an optical transmission/reception unit LP2 through a power amplifier Z, where the signal is changed into a light, which is outputted over a wide range by means of a concaved mirror Y. Then the signal is received by sets S1-S3 of students P1-P3. Further, the optical output of the S1-S3 is received by the concaved mirror Y, collected to the optical transmission/reception unit LP2, amplified by the power amplifier Z and the output of the optical transmission/reception unit LP1 is received by the S0. |
