Abstract: While illuminating light is separated into a first wavelength component illuminating light and second and third wavelength component illuminating lights by a dichroic mirror, the first illuminating light is reflected off a first liquid crystal display element to form a first wavelength component image light which is then reflected off or passed through the polarizing surface of a first polarizing beam splitter, whereas one of the second and third wavelength component illuminating lights has its polarizing surface 90°-converted by a ½ phase difference plate, the other one is passed through the plate without having its polarizing surface converted, the second and third wavelength components are separated from each other by a second polarizing beam splitter and respectively reflected off second and third liquid crystal display elements to obtain second.

Abstract: A lens-laminated composite optical element composed of a vitreous optical element having a plane surface to perform inherent optical functions, and a thin and filmy transparent plastic lens portion molded in a curved lens profile and laminated on the plane surface of the vitreous optical element by the use of a mold.

Abstract: An optical data code reader employing a scanner of simplified compact construction, which is constituted by a light projection means including a light source and a converging lens and a reflected light sensor means including a reflected light capture lens and a photosensitive element. A laser diode serving as the light source and a photodiode serving as the photosensitive element are mounted side by side on a common substrate in the form of a single chip module. A converging ball lens of the light projection means and the capture lens of the reflected light sensor means are mounted on a common support member, which is connected to the substrate of the laser diode and photodiode in such a manner as to facilitate assembling of the respective components. The capture lens is arranged as a narrow band pass filter permitting passage of only light rays of wavelengths originating from the light source of the scanner.