Deflecting a light beam in the same direction and speed of a recording medium by a rotating polygon or a holographic disk

The recording device of claim ! , further comprising:

• means for always maintaining the light spot on one fixed region of the recording medium during a period in which a recording mark is formed in the said fixed region, by moving the light spot so as to follow the movement of the medium.

An optical reproduction device for producing reproduced data by focusing a light beam into a light spot on a projection start position on a moving recording medium having a recording mark formed thereon and generating a readout signal using reflected light from said light spot based on a reproduction clock signal, comprising light-beam deflecting means for repeatedly performing a unidirectional scanning in synchronism with the recording data or a recording clock signal by moving the light spot from the projection start position in a direction equal to a moving direction of said optical recording medium and to follow a moving speed of said optical recording medium.

An optical recording device for forming on a moving recording medium a recording mark corresponding to recording data by focusing a light spot on a projection start position on said optical recording medium and raising a temperature of a portion of said optical recording medium exposed to the light spot, comprising:

• laser source means for generating a laser beam for forming said light spot on said medium;
• and
• causing means for causing said light spot to follow said portion of said medium during a period in which information is recorded in said portion.