Light deflecting apparatus

Claim 2

A light deflecting apparatus for deflecting a light beam to scan over a predetermined scanned surface, comprising: a mirror for deflecting the light beam; a case enclosing said mirror and being attached to a base plate; a laser oscillator attached to said case in spaced-apart relationship with the base plate for generating the light beam; and a lens for forming an image of the light beam on said scanned surface.

Claim 3

The light deflecting apparatus according to claim 1, further comprising a mechanism for mounting a measuring device for providing a measurement of the intensity of the light beam outside the apparatus.

Claim 4

The light deflecting apparatus according to claim 2, wherein said measuring device is mounted between said light source and said mirror.

Claim 5

The light deflecting apparatus according to claim 1, wherein said mirror is a polygon mirror.

Claim 6

The light deflecting apparatus according to claim 1, wherein said laser oscillator is a semiconductor laser.

Claim 7

The light deflecting apparatus according to claim 5, wherein a collimator optical system for making the output beam of said semiconductor laser into a parallel beam is disposed between said semiconductor laser and said mirror.

Claim 8

The light deflecting apparatus according to claim 6, wherein an optical system for making the cross-sectional shape of said parallel beam into a circular shape is disposed between said collimator optical system and said mirror.

Claim 9

A light deflecting apparatus for deflecting a light beam to scan over a predetermined scanned surface comprising: a mirror for deflecting the light beam; a first case enclosing said mirror; a laser oscillator for generating the beam; a second case to which said laser oscillator is attached; locating means for attaching said second case to said first case; an adjusting means for adjusting the attachment position of said second case to said first case; and a lens for imaging the light beam on said scanned surface.

Claim 10

A light deflecting apparatus for deflecting a light beam to scan over a predetermined scanned surface comprising: a mirror for deflecting the light beam; a first case enclosing said mirror; a laser oscillator for generating the beam; a second case to which said laser oscillator is attached; locating means for attaching said second case to said first case; an adjusting means for adjusting the attachment position of said second case to said first case; and a lens for imaging the light beam on said scanned surface.

Claim 11

The light deflecting apparatus according to claim 8, wherein said locating means is constituted by a cylindrical fitting portion.

Claim 12

The light deflecting apparatus according to claim 9, wherein said cylindrical fitting portion comprises a cylindrical projected portion provided on said first case and a cylindrical inside diameter surface provided in said second case.

Claim 13

The light deflecting apparatus according to claim 8, wherein said adjusting means comprises a locating pin and said first and second cases are provided with holes in which said pin is inserted.

Claim 14

The light deflecting apparatus according to claim 8, wherein said mirror is a polygon mirror.

Claim 15

The light deflecting apparatus according to claim 12, wherein an f·θ lens is provided in the beam emergence port of said first case.

Claim 16

A light deflecting apparatus for deflecting a light beam to scan over a scanned surface, comprising: a laser oscillator for generating a light beam; a mirror for deflecting the light beam; a motor mechanism for rotating said mirror; a housing for enclosing said mirror and said motor mechanism; and manual rotating means provided on said housing for manually rotating said mirror, said manual rotating means being capable of rotating said mirror in said housing by access through said housing from the outside.

Claim 17

A light deflecting apparatus for deflecting a light beam to scan over a scanned surface, comprising: a laser oscillator for generating a light beam; a mirror for deflecting the light beam; a motor mechanism for rotating said mirror; a housing for enclosing said mirror and said motor mechanism; and manual rotating means provided on said housing for manually rotating said mirror, said manual rotating means being capable of rotating said mirror in said housing by access through said housing from the outside.

Claim 18

The light deflecting apparatus according to claim 14, wherein said rotating means has bias means for separating said rotating means from said mirror when said mirror is not manually rotated.

Claim 19

The light deflecting apparatus according to claim 15, wherein a friction member is provided in the portion of contact between said mirror and said rotating means.

Claim 20

The light deflecting apparatus according to claim 14, wherein said mirror is a polygon mirror.