Abstract: A code reader which includes a housing; a reading portion, provided on the housing, for reading a code provided on an object; an illumination device provided in the housing; an image capturing device, provided in the housing, for imaging the code, the illumination device irradiating light to a surface to be read provided with the code reflecting the irradiated light, the image capturing device configured to be entered with the reflected light via an entrance pupil provided in the housing, the image capturing device being configured to read information of the code, a diffusion member for permeating and diffusing the light from the illumination device and for irradiating the diffused light to the surface to be read, the plural illumination device positioned opposite each other relative to the entrance pupil, and the diffusion member positioned between the illumination device and the reading portion.

Abstract: A code reader is configured to reads information unique to an object from a code (e.g., one dimensional code, two dimensional code, three dimensional code, or multi-dimensional code combined with different codes, hereinafter referred to as a code) by providing the code directly or indirectly on the object in order to identify the particular object (e.g., a product) among the plural objects made of metal, rubber, ceramic, and resin, or the like.

Abstract: A high-frequency input impedance matching circuit includes an inductor connected between an input of a transistor and an input terminal of the high-frequency input impedance matching circuit, a first capacitor having one end connected to the input terminal and another end connected to a ground, and a second capacitor connected to the inductor in parallel.

Abstract: An optical scanning apparatus RD scans a laser beam and detects a foregoing vehicle FC present in a forward direction by a reflected beam derived from the laser beam. The apparatus includes a first mode for emitting a narrowed laser beam and a widened laser beam and a second mode for emitting the widened laser beam and the two modes are switched to thereby provide an apparatus for emitting a beam capable of detecting an object in a wide range, causing no detection failure and in compliance with a situation of surrounding objects.