Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
214 words
In a method for recording a desired picture by, upon sweeping a light beam obtained from a single modulated light beam source and then scanning, with the thus-swept light beam, a recording surface on which a photosensitive material has been coated, branching out a portion of swept light beam by a half-mirror, feeding the branching-out portion of the swept light beam to optical sweep position detecting means, and then modulating the light beam from the light beam source in accordance with a picture signal obtained in synchronization with a position signal produced by the detecting means on the basis of the thus-detected portion of the swept light beam in such a way that one of the thus-modulated light beams is continuously maintained, at least, at such a low light quantity level that is too small to expose the photosensitive material substantially, and in the case of recording the picture the other modulated light beam having a high light quantity level which is sufficient for substantially exposing the photosensitive material, the improvement which comprises that the level of the position signal obtained by the detecting means is changed to a predetermined level in accordance with the level of the picture signal which controls the intensity of the light beam obtained from the light beam source.
Claim 2
Dependent Claim
214 words
In a method for recording a desired picture by, upon sweeping a light beam obtained from a single modulated light beam source and then scanning, with the thus-swept light beam, a recording surface on which a photosensitive material has been coated, branching out a portion of swept light beam by a half-mirror, feeding the branching-out portion of the swept light beam to optical sweep position detecting means, and then modulating the light beam from the light beam source in accordance with a picture signal obtained in synchronization with a position signal produced by the detecting means on the basis of the thus-detected portion of the swept light beam in such a way that one of the thus-modulated light beams is continuously maintained, at least, at such a low light quantity level that is too small to expose the photosensitive material substantially, and in the case of recording the picture the other modulated light beam having a high light quantity level which is sufficient for substantially exposing the photosensitive material, the improvement which comprises that the level of the position signal obtained by the detecting means is changed to a predetermined level in accordance with the level of the picture signal which controls the intensity of the light beam obtained from the light beam source.
Claim 3
Dependent Claim
46 words
The recording method as claimed in claim 1, wherein the optical sweep position detecting means is provided at the output side thereof with means adapted to change the amplification factor for the position signal depending whether the level of the picture signal is low or high.
Claim 4
Dependent Claim
54 words
The recording method as claimed in claim 1, wherein the optical sweep position detecting means is provided at the output side thereof with means adapted to amplify the position signal when the level of the picture signal is low but to attenuate the position signal when the level of the picture signal is high.