An optical connector includes a housing including a coupling portion for coupling another optical connector and a blocking component for blocking an optical axis arranged in the coupling portion. In one particular embodiment, a position of an on-site front or rear projection surface is determined by a device, and the device maps a position and angle of an on-site camera in relation to the on-site projection surface. A baseband processing unit and the like transmit, as a transmission rate inquiry signal, a packet signal constituted by a plurality of streams where the amounts of timing shift are made to differ, and receive a response signal to which the same identification number is appended for the inquiry signal. Based on the two sets, the apparatus determines whether reactivity is present in the physiological signal data. The method comprising: providing a substrate; forming a masking image having a sidewall on the substrate; forming a blocking layer on the substrate and on the masking image; and performing a retrograde ion implant through the blocking layer into the substrate, wherein the blocking layer substantially blocks ions scattered at the sidewall of the masking layer. A commission is then paid to the photographer for the transaction.