US 4,307,408 A · Recording apparatus using coherent light

Abstract

This specification discloses a recording apparatus using coherent light which comprises coherent light generating means for generating coherent light, light modulating means into which the coherent light from the coherent light generating means enters, whereby when in ON state, the light modulating means emits the entering coherent light outwardly as zero-order light having a certain angle of emergence and when in OFF state, the light modulating means derives the entering coherent light as a primary light having another angle of emergence, the primary light being intercepted by an intercepting member so as not to be emitted outwardly, means for applying modulating signal to the light modulating means for controlling ON-OFF of the light modulating means, deflector means for deflecting the zero-order light emitted from the light modulating means, and a recording medium upon which the deflected zero-order light is thrown and which is sensitized by the zero-order light from the light modulating means when in ON state and which is not sensitized by the zero-order light leaking from the light modulating means when in OFF state.

Claims14

Dependent claims

A recording apparatus using coherent light, comprising:

coherent light generating means for generating coherent light;
light modulating means, into which the coherent light from said coherent light generating means enters, for emitting the entered coherent light as zero-order light having a first angle of emergency when said means is in the ON state, and for deriving the coherent light as a primary light having a second angle of emergence when said means is in the OFF state, said modulating means including an intercepting member for intercepting said primary light and preventing its emergency from said modulating means along said second angle of emergence, wherein leak light is produced in said modulating means when it is in the OFF state;
means for applying a modulating signal to said light modulating means for controlling the ON and OFF states of said light modulating means;
a recording medium for recording the coherent light projected thereon;
and
deflector means constructed and arranged to deflect the leak light, derived from said light modulating means when in the OFF state, to scan said recording medium in a single direction along a common scanning line but subsequent to, the zero-order light scanning for treating the recording medium.

3 more elements

Dependencies are inferred from the claim text.

Recording apparatus using coherent light

Life of this patent

Recording apparatus using coherent light

Life of this patent

Abstract

Claims14