JPH0410275B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an optical scanning recording device that records information by scanning a recording medium using a light beam.

2. Description of the Related Art In a conventional optical scanning recording device, as shown in FIG. The light beam is modulated in intensity and enters a beam expander 203, where the diameter of the light beam is expanded, and then guided to a rotating polygon mirror 204 having a plurality of mirror surfaces. The rotating polygon mirror 204 is rotated at a constant speed by a motor 205, the light beam guided to the rotating polygon mirror 204 is scanned in the rotation direction, and the light beam 207 that has passed through the fθ lens 206 is projected onto the recording medium 209. An image is formed as a spot, and recorded information is scanned and recorded as the intensity of the light spot. The photodetector 208 receives a synchronization signal (not shown) indicating the start of scanning of the light beam 207 to be scanned.
Output. This synchronization signal causes the recording medium 20
9 is determined to start inputting the information signal to the optical modulator 202 to reduce synchronization deviation in the optical scanning direction of the recorded image caused by uneven rotation of the motor 205 or mirror division error of the rotating polygon mirror 204. . Since the synchronization signal is output every time the light beam is scanned by the rotating polygon mirror 204, it is proportional to the rotation speed of the motor 205 and the increase in the number of mirror surfaces of the rotating polygon mirror 204.
The number of times the synchronization signal is output per unit time increases.
As the number of output synchronization signals increases, it is also necessary to increase the output speed of the recording information signal output from the recording information providing device (not shown).

Problems to be Solved by the Invention In the conventional technology, it is necessary to set the output speed of the recording information signal sent from the recording information providing device so as to adapt to the output speed of the synchronization signal output from the optical scanning recording device. When connecting an optical scanning recording device and a recorded information providing device, a major problem is the restriction and lack of flexibility due to the information processing speed of both devices.

By controlling the synchronization signal output from the optical scanning recording device, the present invention also enables connection with a recorded information providing device having a slow information processing speed.

Means for Solving the Problems In order to solve the above problems, the present invention provides a gate that controls the output of a synchronization signal indicating the start of optical scanning output from a photodetector that detects a beam to a recording information providing means. a recording control means for receiving a recording information signal sent from the recording information supplying means and outputting a gate signal to the gate circuit; and a recording medium feed for controlling the feeding speed of the recording medium in accordance with the output cycle of the synchronization signal. It is equipped with a speed control circuit.

Effects According to the above configuration, the present invention controls the synchronization signal gate circuit of the optical scanning recording device to stop outputting the synchronization signal until the recording information providing means becomes capable of transmitting the recording information signal. When the signal can be sent, the synchronization signal gate circuit is opened to output the synchronization signal, and the optical scanning recording device receives the recording information signal and scans and records the information on the recording medium. Adapting to the frequency at which the output of the synchronization signal is stopped by the synchronization signal gate circuit, the recording medium feed speed control circuit controls the motor etc. to reduce the feed speed of the recording medium, so that an image without dimensional distortion can be produced on the recording medium. to be able to record on top.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing one embodiment of the present invention. In FIG. 1, reference numeral 101 denotes a recording information providing device, and a synchronizing signal 11 is sent from an optical scanning recording device 120.
0, the recording information signal 102 is sent to the optical scanning recording device 120. Reference numeral 120 denotes an optical scanning recording device, which includes a recording control circuit 103, and although not shown in the figure, a recording light source, a lens, an optical system, a light beam scanning mechanism, a recording medium feeding mechanism, and the like. 10
3 is a recording control circuit, and the recorded information providing device 10
Upon receiving the recording information signal 102 sent from 1,
It performs desired signal processing and outputs an optical modulation signal 104 to an optical modulator 105, a synchronization signal gate signal 109, and a recording medium feed speed control signal 111. Reference numeral 105 denotes an optical modulator that receives the optical modulation signal 104 and modulates the light beam to have a light intensity corresponding to recorded information. A photodetector 106 is arranged to detect the start of scanning of a light beam to be scanned, and outputs a synchronization signal 107 indicating the start of scanning. 108 is a synchronization signal gate circuit which receives the synchronization signal gate signal 109 from the recording control circuit 103 and outputs the synchronization signal 1.
07 to the recorded information providing device 101 or stop outputting it. Reference numeral 112 denotes a recording medium feed speed control circuit, which receives the synchronization signal feed speed control signal 111 from the recording control circuit 103, controls the rotational speed of the recording medium feed motor 114, and variably controls the feed speed of the recording medium.

If the rotational speed of the rotating polygon mirror 204 that performs the light beam scanning shown in FIG. 2 is N (rpm), and the number of mirror surfaces is P (planes), the period T ₀ as shown in FIG. 3 a is T ₀ = A synchronization signal 107 of 60/(N·P) (seconds) is obtained. If the synchronization signal gate signal 109 shown in FIG. 3b is inputted to the synchronization signal gate circuit 108, a synchronization signal 110 having a period T ₁ T2·T ₀ (seconds) as shown in FIG. 3c is output. Ru. Upon receiving this synchronization signal 110, the recorded information providing device 101:
A recording information signal 102 shown in FIG. 3d is sent out.
In this case, the recorded information providing device 101 only needs to perform signal processing of the recorded information within time _T1 . Since the length of T ₁ can be arbitrarily set as an integer multiple of T ₀ , the processing speed of the recording information signal can be made even slower without changing (especially reducing) the rotation speed or the number of mirror surfaces of the rotating polygon mirror 204. Connection with the recorded information providing device 101 is also possible. When the synchronization signal gate signal 109 shown in _FIG . The recording information signal 102 shown in FIG. 3g is sent out, and scanning recording at the highest speed is performed.

As described above, when the period of the synchronization signal 110 is extended to _T1 by the synchronization signal gate circuit 108,
The feed speed V ₁ of the recording medium is determined from the feed speed V ₀ when the period of the synchronization signal 110 is not extended and is set to T ₀ , so that V ₁ = (T ₀ /T ₁ )・V ₀ . Feed rate control circuit 112
A recording medium feed speed control signal 111 is applied to
A good image without dimensional distortion in the feeding direction is recorded on the recording medium.

Effects of the Invention As described above, according to the present invention, by controlling the output of the synchronization signal from the optical scanning recording device to the recorded information providing means, it is possible to connect to the recorded information providing means whose recorded information processing speed is low. This is extremely useful as it greatly increases practical flexibility.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an optical scanning recording device according to an embodiment of the present invention, FIG. 2 is a perspective view showing an example of the configuration of the optical scanning recording device, and FIG. 3 is a waveform diagram of the main part of FIG. 1. It is. 101...Recorded information providing device, 106...Photodetector, 108...Synchronization signal gate circuit, 109
... Recording control circuit, 105 ... Optical modulator, 112
...Recording medium feed speed control circuit.

Claims (1)

[Claims] 1. A scanning recording device that records recorded information sent from a recorded information providing means onto a recording medium by scanning a light beam or the like, which includes a photodetector that detects the beam, and a photodetector that detects the beam, and a photodetector that detects the beam that is output from the photodetector. a gate circuit that controls the output of a synchronization signal to the recording information supply means; a recording control means that receives a recording information signal sent from the recording information supply means and outputs a gate signal to the gate circuit; and the synchronization signal. 1. A scanning recording apparatus comprising a recording medium feed speed control circuit that controls the feed speed of the recording medium in accordance with the output cycle of the recording medium.