Beam scanning apparatus and apparatus for writing image information

Claim 2

A beam scanning apparatus comprising: optical deflecting means for deflecting light beam so as to guide it to a predetermined surface; scanning means for changing at least one of a deflection angle and a deflection position of said optical deflecting means so that the light beam is scanned on said predetermined surface; detecting means for detecting the scanning state of the light beam by said scanning means on said predetermined surface by receiving the light beam from said optical deflecting means; and controlling means for correcting at least one of said deflection angle and said deflection position of said optical deflecting means on the basis of the detection result of said detecting means.

Claim 3

An apparatus according to claim 1, wherein said scanning means changes the deflection angle of said optical deflecting means.

Claim 4

An apparatus according to claim 2, wherein said detecting means includes a beam splitter disposed in the optical path between said optical deflecting means and said predetermined surface, and an optical detector for detecting the beam split by said beam splitter from the beam directed to said predetermined surface.

Claim 5

An apparatus according to claim 3, wherein said optical detector detects an incident position of the beam split by said beam splitter, and said controlling means controls the change in said angle of deflection based on said detected incident position.

Claim 6

An apparatus according to claim 4, wherein said optical detector has a CCD area sensor.

Claim 7

An apparatus according to claim 2, wherein said optical deflecting means has a first and a second mirrors.

Claim 8

An apparatus according to claim 6, wherein said scanning means includes a first driving means for rotating said first mirror, and a second driving means for rotating said second mirror.

Claim 9

An apparatus according to claim 7, wherein the light beam is scanned in a first direction on said predetermined surface by said first mirror being driven by said first driving means and the light beam is scanned in a second direction on said predetermined surface by said second mirror being driven by said second driving means.

Claim 10

An apparatus according to claim 8, wherein said detecting means includes a beam splitter disposed in the optical path between said first and second mirrors and said predetermined surface, and an optical detector for detecting the beam split by said beam splitter from the beam directed to said predetermined surface.

Claim 11

An apparatus according to claim 9, wherein said optical detector includes a sensor for two-­dimensionally detecting the incident position of said split beam.

Claim 12

An image information writing apparatus, comprising: optical deflecting means for deflecting light beam for writing image information so as to guide it to the surface of an object to be written on; scanning means for changing at least one of a deflection angle and a deflection position of said deflecting means so that the light beam is scanned on said object; detecting means for detecting the scanning state of the beam by said scanning means on said object by receiving the light beam from said optical deflecting means; and controlling means for correcting at least one of said deflection angle and said deflection position of said optical deflecting means based on the detection result of said detecting means.

Claim 13

An image information writing apparatus, comprising: optical deflecting means for deflecting light beam for writing image information so as to guide it to the surface of an object to be written on; scanning means for changing at least one of a deflection angle and a deflection position of said deflecting means so that the light beam is scanned on said object; detecting means for detecting the scanning state of the beam by said scanning means on said object by receiving the light beam from said optical deflecting means; and controlling means for correcting at least one of said deflection angle and said deflection position of said optical deflecting means based on the detection result of said detecting means.

Claim 14

An apparatus according to claim 11, wherein said scanning means changes the deflection angle of said optical deflecting means.

Claim 15

An apparatus according to claim 12, wherein said optical deflecting means guides the light beam to a high-polymer liquid crystal as said object.

Claim 16

An apparatus according to claim 12, wherein said scanning means change the angle of deflection of said optical deflecting means so that the light beam is two-dimensionally scanned on said object.

Claim 17

A beam scanning apparatus comprising: a mirror for deflecting light beam so as to guide it to a predetermined surface; an electric motor for changing a reflective angle of the light beam on said mirror so that the light beam is scanned on said predetermined surface; a sensor for detecting the scanning state of the beam by said electric motor on said predetermined surface by receiving the light beam from said mirror; and a controller for correcting said beam reflection angle of said mirror based on the detection result of said sensor.

Claim 18

A beam scanning apparatus comprising: a mirror for deflecting light beam so as to guide it to a predetermined surface; an electric motor for changing a reflective angle of the light beam on said mirror so that the light beam is scanned on said predetermined surface; a sensor for detecting the scanning state of the beam by said electric motor on said predetermined surface by receiving the light beam from said mirror; and a controller for correcting said beam reflection angle of said mirror based on the detection result of said sensor.

Claim 19

A beam scanning apparatus comprising: first and second optical deflecting means for deflecting light beam so as to guide it to a predetermined surface; first scanning means for changing at least one of a deflection angle and a deflection position of said first optical deflecting means so that the light beam is scanned in a first direction on said predetermined surface; second scanning means for changing at least one of a deflection angle and a deflection position of said second deflecting means so that the light beam is scanned on said predetermined surface in a second direction intersecting said first direction; detecting means for detecting the scanning state of the light beam by said first and second scanning means on said predetermined surface by receiving the light beam from said first or second optical deflecting means; and controlling means for correcting both at least one of said deflection angle and said deflection position of said first optical deflecting means and at least one of said deflection angle and said deflection position of said second optical deflecting means, on the basis of the detection result of said optical detecting means.

Claim 20

A beam scanning apparatus comprising: first and second optical deflecting means for deflecting light beam so as to guide it to a predetermined surface; first scanning means for changing at least one of a deflection angle and a deflection position of said first optical deflecting means so that the light beam is scanned in a first direction on said predetermined surface; second scanning means for changing at least one of a deflection angle and a deflection position of said second deflecting means so that the light beam is scanned on said predetermined surface in a second direction intersecting said first direction; detecting means for detecting the scanning state of the light beam by said first and second scanning means on said predetermined surface by receiving the light beam from said first or second optical deflecting means; and controlling means for correcting both at least one of said deflection angle and said deflection position of said first optical deflecting means and at least one of said deflection angle and said deflection position of said second optical deflecting means, on the basis of the detection result of said optical detecting means.

Claim 21

An apparatus according to claim 16, wherein said detecting means includes a beam splitter disposed in the optical path between said first or second optical deflecting means and said predetermined surface, and an optical detector for detecting the light beam split by said beam splitter from the beam directed to said predetermined surface.

Claim 22

An apparatus according to claim 17, wherein said optical detector includes a sensor for two-­dimensionally detecting the incident position of said split beam.

Claim 23

An apparatus according to claim 18, wherein each of said first and second optical deflecting means includes plane mirror.

Claim 24

An image information writing apparatus, comprising: first and second optical deflecting means for deflecting light beam for writing image information so as to guide it to an object on which image information is written; first scanning means for changing at least one of a deflection angle and a deflection position of said first optical deflecting means so that the light beam is scanned in a first direction on said object; second scanning means for changing at least one of a deflection angle and a deflection position of said second optical deflecting means so that the light beam is scanned on said object in a second direction intersecting said first direction; detecting means for detecting the scanning state of the light beam by said first and second scanning means on said object by receiving the light beam from said first or second optical deflecting means; and controlling means for correcting both at least one of said deflection angle and said deflection position of said first optical deflecting means and at least one of said deflection angle and said deflection position of said second optical deflecting means, on the basis of the detection result of said optical detecting means.

Claim 25

An image information writing apparatus, comprising: first and second optical deflecting means for deflecting light beam for writing image information so as to guide it to an object on which image information is written; first scanning means for changing at least one of a deflection angle and a deflection position of said first optical deflecting means so that the light beam is scanned in a first direction on said object; second scanning means for changing at least one of a deflection angle and a deflection position of said second optical deflecting means so that the light beam is scanned on said object in a second direction intersecting said first direction; detecting means for detecting the scanning state of the light beam by said first and second scanning means on said object by receiving the light beam from said first or second optical deflecting means; and controlling means for correcting both at least one of said deflection angle and said deflection position of said first optical deflecting means and at least one of said deflection angle and said deflection position of said second optical deflecting means, on the basis of the detection result of said optical detecting means.