摘要:
An optical signal encoder/decoder includes a grating waveguide having an identical number of uniform pitch gratings to the number of code chips of a binary phase optical code, the uniform pitch gratings being formed in a waveguide direction to reflect light of a predetermined wavelength. Here, adjacent gratings corresponding to a position at which the optical code value changes are disposed a spacing apart from each other to give a phase shift of (2m+1)π/2 to the light, and the remaining adjacent gratings are disposed a spacing apart from each other to give a phase shift of nπ to the light (m, n: integer).
摘要:
A method of fabricating an optical waveguide device has the steps of forming a Bragg grating by applying ultraviolet light to an optical waveguide to generate photoinduced refractive index changes, and adjusting characteristics of the Bragg grating by applying ultraviolet light for trimming to the optical waveguide. The Bragg grating forming step is executed by applying ultraviolet light to the optical waveguide through a phase mask, and the adjusting step is executed by applying ultraviolet light for trimming to the optical waveguide not through the phase mask.
摘要:
An alignment system finds the coordinates of a first point on a photosensitive optical fiber by scanning an ultraviolet beam across the fiber several times at successively decreasing speeds and detecting light returned from the fiber. The coordinates of a second point on the fiber are found similarly. On the basis of the coordinates of the first and second points, the alignment system automatically aligns the fiber in a direction suitable for the formation of an optical filter in the fiber.
摘要:
A photosensitive optical fiber being scanned by an ultraviolet beam to form an optical filter is aligned with the beam by detecting fluorescence produced in the fiber. The relative position of the fiber and beam is made to oscillate in a direction perpendicular to the scanning direction. Misalignment is corrected according to the phase relationship between the fluorescence detection signal and the oscillation, permitting the alignment to be controlled accurately regardless of the beam dimensions, scanning distance, scanning rate, and natural fluorescence variations.
摘要:
A sorter distributes plural sheets to plural sheet holding bins. The sorter includes the plural sheet holding bins for holding the plural sheets, in which inserting portions of the plural sheet holding bins are aligned in a line in a predetermined direction; a conveyance belt for conveying the plural sheets along the line; a distributor, that is reciprocally movable along the line, for distributing the plural sheets to the plural sheet holding bins; motorized pulleys for winding and unwinding a wire member; the wire member being connected between the motorized pulleys and the distributor; nipping apparatus for nipping and for conveying each of the plural sheets, the nipping apparatus being positioned between the conveyance belt and the wire member.
摘要:
A sheet sorting machine for sorting plural sheets to plural groups and stapling the sheets by the group. The sheet sorting machine has a sorting assembly to convey the sheets to the plural bins by the group; a positioning member to true up the sheets to a setting position in each of the bins; a member to fix the sheets in the bins; oscillator to move the bins, holding the sheets at the setting position in the bins, to a stapling position; and stapler to staple the sheets at the stapling position; in which the fixing member fixes the sheets before the oscillator sets the sheets to the stapling position.