| 摘要 |
<p>PURPOSE:To make a special light emitting source unnecessary, and to make power consumption low, by collecting peripheral light by a light collecting part, covering it to an infrared ray, leading its converted infrared ray onto a business form on which a character, a symbol, etc. are printed, and converting a reflected ray from the business form to an electric signal. CONSTITUTION:A lens 2 is placed on a housing 1 of a light pen used as an optical reader, and peripheral light from the circumference is collected by the lens 2. A projection 3 for guiding a character, a symbol, etc. and a head part 4 are provided on the tip of this housing 1. A reflecting film 6 which makes visible light transmit and does not make an infrared ray transmit but reflects it, a fluorescent layer 7 for conerting the visible light to an infrared ray, and light leading glass 8 are placed on this head part 4, and a reflecting film 5 for reflecting the visible light and the infrared ray is provided on the projection 3. In this way, peripheral light is collected, is converted to an infrared ray, the converted infrared ray is guided onto a character, a symbol, etc. printed on a business form, and a reflected ray from the business form is converted to an electric signal, by which a special light emitting source is made unnecessary, and low power consumption of the reader is realized.</p> |
