Combination of circular/straight line light beam scan transforming apparatus and optical device and method of fabricating circular/straight line transforming device

A combination of a circule-line circular/straight line light beam scan transforming apparatus and optical device, said light apparatus comprising:

• rotary mirror means adapted to reflect light beam;
• circular/straight line transforming optical fiber means which comprises:
• a linear portion adapted to guide light beam to a cylindrical portion, said cylindrical portion having the fore end part thereof bent toward the center thereof so that the extension of the bent part intersects the axis of rotation of said rotary mirror means, the light beam issuing from the fore end part being reflected by said rotary mirror means and directed to said light-receiving means;
• and
• focussing means for focussing the reflected light from said rotary mirror means,
• said optical device comprising:
• light-receiving means incorporating therein a light-receiving element disposed on the axis of rotation of said rotary mirror means;
• and
• guide means adapted to guide image light issuing from an illuminated object to said linear portion, whereby the image light introduced by said guide means to the linear portion is emitted to the position of said cylindrical portion corresponding to the position of said linear portion.

A method for the fabrication of a circular/straight line transforming device comprising the steps of:

• preparing a winding frame having a cylindrical main frame opened at opposite ends and a cylindrical sub-frame temporarily attached to one of the ends of the cylindrical main frame, the cylindrical sub-frame having the inner surface treated so as to repel an adhesive agent, for retaining thereon a linear portion;
• winding an optical fiber round the wall of the winding frame toroidally until the wall is wholly covered with at least a single layer of the optical fiber;
• establishing mutual adhesion between the optical fiber and the cylindrical sub-frame and between the adjacent optical fiber plies at the outer end part of the cylindrical sub-frame;
• cutting the optical fiber along the inner-diametral, outer end corner of the cylindrical sub-frame;
• removing from the cylindrical sub-frame the linear portion to which one cut end part of the optical fiber layer adheres;
• drawing said linear portion out of the other open end of the cylindrical main frame;
• subjecting the linear portion to a treatment for training the linear portion in a straightened state;
• removing from said cylindrical main frame the cylindrical sub-frame to which the other cut end part of the optical fiber layer adheres;
• and
• treating the cut end part bonded to the cylindrical sub-frame and the cut end part at the linear portion thereby providing therefor optically finished surfaces suitable for entrance and departure of light beam.

A method for the fabrication of a circular/straight line transforming device comprising the steps of:

• preparing a winding frame having a cylindrical main frame opened at opposite ends, a cylindrical sub-frame temporarily attached to one of the ends of said main frame and a linear portion support plate temporarily joined to the inner surface of said cylindrical sub-frame;
• winding an optical fiber round the wall of said winding frame toroidally until the wall is wholly covered with at least a single layer of the optical fiber;
• establishing mutual adhesion between said optical fiber and said cylindrical sub-frame at the outer end part of said cylindrical sub-frame;
• cutting said optical fiber along the outer boundary between said cylindrical sub-frame and said linear portion support plate;
• peeling from said cylindrical sub-frame said linear portion support plate to which one cut end part of the optical fiber adheres;
• drawing said linear portion support plate out of the other open end of said main frame;
• subjecting said linear portion support plate to a treatment for training the linear portion support plate in a straightened state;
• separating said cylindrical sub-frame from said main frame;
• and
• treating the other cut end part of said optical fiber adhering to said separated cylindrical sub-frame and said cut end part of the optical fiber adhering to said linear portion support plate, for providing thereto optically finished surfaces suitable for entrance and departure of light beam.

A combination of a circular/straight line light beam scan transforming apparatus and optical device, said optical device comprising:

• means for producing a light beam capable of being varied in intensity by a modulation signal;
• and
• an object exposed to the scanning beam from said light beam scan apparatus,
• said light beam apparatus comprising:
• focussing means for focussing the light beam from said light beam producing means;
• rotary mirror means adapted to reflect the light beam from said focussing means;
• means for rotating said mirror means at a high speed, and
• circular/straight line transforming optical fiber means which includes:
• a cylindrical portion having a plurality of divisional curved portions, each curved portion having a fore end part thereof bent toward the center thereof so that the extension of said bent part intersects the axis of rotation of said rotary mirror means, the reflected light beam being focussed on the fore end part;
• and
• a plurality of linear portions each adapted to receive said light beam from said curved portion and emit said light beam as a linear scanning beam in a sequence in conformity to the sequence of reception of light beam by curved portion.

A method for the fabrication of a circular/straight line transforming device comprising the steps of:

• preparing a winding frame having a cylindrical main frame opened at opposite ends and a cylindrical sub-frame temporarily attached to one of the ends of the cylindrical main frame, the cylindrical sub-frame having the inner surface treated so as to repel an adhesive agent, for retaining thereon a linear portion;
• winding an optical fiber round the wall of the winding frame toroidally until the wall is wholly covered with at least a single layer of the optical fiber;
• establishing mutual adhesion between the optical fiber and the cylindrical sub-frame and between the adjacent optical fiber plies at the outer end part of the cylindrical sub-frame;
• cutting the optical fiber along the inner-diametral, outer end corner of the cylindrical sub-frame;
• removing from the cylindrical sub-frame the linear portion to which one cut end part of the optical fiber layer adheres;
• drawing said linear portion out of the other open end of the cylindrical main frame;
• dividing said linear portion into a plurality of portions;
• overlapping the plurality of divisional portions;
• subjecting the divisional linear portions to a treatment for training them in a straightened state;
• removing from said cylindrical main frame the cylindrical sub-frame to which the other cut end part of the optical fiber layer adheres;
• and
• treating the cut end part bonded to the cylindrical sub-frame and the cut end part at the divisional linear portions thereby providing therefor optically finished surfaces suitable for entrance and departure of light beam.

A method for the fabrication of a circular/straight line transforming device comprising the steps of:

• preparing a winding frame having a cylindrical main frame opened at opposite ends, a cylindrical sub-frame temporarily attached to one of the ends of said main frame and a linear portion support plate temporarily joined to the inner surface of said cylindrical sub-frame;
• winding an optical fiber round the wall of said winding frame from toroidally until the wall is wholly covered with at least a single layer of the optical fiber;
• establishing mutual adhesion between said optical fiber and said cylindrical sub-frame at the outer end part of said cylindrical sub-frame;
• cutting said optical fiber along the outer boundary between said cylindrical sub-frame and said linear portion support plate;
• peeling from said cylindrical sub-frame said linear portion support plate to which one cut end part of the optical fiber adheres;
• drawing said linear portion support plate out of the other open end of said main frame;
• dividing said linear portion support plate into a plurality of portions;
• overlapping the plurality of divisional portions;
• subjecting said divisional portions to a treatment for training them in a straightened state;
• separating said cylindrical sub-frame from said main frame;
• and
• treating the other cut end part of said optical fiber adhering to said separated cylindrical sub-frame and said cut end part of the optical fiber adhering to said divisional portions, for providing thereto optically finished surfaces suitable for entrance and departure of light beam.