Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
169 words
An optical axis monitoring apparatus for monitoring a variation in optical axis of a light beam in an optical recording system, comprising: a light source for emitting said light beam; a first optical system for projecting and positioning said light beam; first monitoring means for monitoring a first variation in optical axis of the light beam and producing a monitored light beam; an acousto-optical modulator, on which the monitored light beam is incident, for producing a zero-th order beam and a diffracted beam modulated by a recording signal; second monitoring means for receiving the zero-th order beam to monitor a second variation in optical axis, said second monitoring means including reflecting means for reflecting the zero-th order beam, said reflecting means being placed so as not to intercept the diffracted beam, and a first light-receiving element for monitoring said reflected zero-th order beam, said first light-receiving element being a two-dimensional position monitoring sensor; and a second optical system for projecting said diffracted beam on a recording medium for recording.
Claim 2
Dependent Claim
169 words
An optical axis monitoring apparatus for monitoring a variation in optical axis of a light beam in an optical recording system, comprising: a light source for emitting said light beam; a first optical system for projecting and positioning said light beam; first monitoring means for monitoring a first variation in optical axis of the light beam and producing a monitored light beam; an acousto-optical modulator, on which the monitored light beam is incident, for producing a zero-th order beam and a diffracted beam modulated by a recording signal; second monitoring means for receiving the zero-th order beam to monitor a second variation in optical axis, said second monitoring means including reflecting means for reflecting the zero-th order beam, said reflecting means being placed so as not to intercept the diffracted beam, and a first light-receiving element for monitoring said reflected zero-th order beam, said first light-receiving element being a two-dimensional position monitoring sensor; and a second optical system for projecting said diffracted beam on a recording medium for recording.
Claim 3
Dependent Claim
66 words
The optical axis monitoring apparatus according to claim 1, wherein said first monitoring means includes a beam splitter and a second light-receiving element, said beam splitter for splitting said light beam into the monitored beam and a second beam, said second light-receiving element for receiving the second beam to monitor a second variation in optical axis, said second light-receiving element being a two-dimensional position monitoring sensor.
Claim 4
Dependent Claim
29 words
The optical axis monitoring apparatus according to claim 2, wherein said monitoring means includes processing means for processing signals generated by each of said first and second light-receiving means.
Claim 5
Dependent Claim
46 words
The optical axis monitoring apparatus according to claim 1, wherein said first optical system includes a first mirror and a second mirror, said first and second mirror being movable in a plurality of directions, said plurality of directions including an angular component and a parallel component.
Claim 6
Dependent Claim
34 words
The optical axis monitoring apparatus according to claim 1, wherein said second optical system includes a first mirror, a second mirror and a third mirror for projecting said diffracted beam on said recording medium.
Claim 7
Dependent Claim
50 words
The optical axis monitoring apparatus according to claim 1, further comprising a first converging lens and a second converging lens, said first converging lens being positioned between said beam splitter and said acousto-optic modulator, and said second converging lens being positioned between said reflecting means and said second optical means.