| 摘要 |
PURPOSE:To constitute a device into an integral structure and to facilitate handling by making the pitch of materials constituting a wire grating shorter than a half wavelength of the light to be detected and making their width longer than 60% of the pitch. CONSTITUTION:A wire grating 3 consisting of plural light-nontransmissive material stripes parallel with one another is provided on the light receiving face 2 of a semiconductor light receiver 1. The pitch of light-nontransmissive materials constituting the wire grating 3 is made shorter than a half wavelength of the light to be detected and their width is made longer than 60% of the pitch. A polarized light in the direction parallel with the direction of the wire grating 3 is intercepted and only a polarized light in the direction perpendicular to the direction of the wire grating 3 is made incident on the receiver 1. Thus, the device is handled easily with the integral structure. |
