JPS63173032A - Information recorder - Google Patents

Abstract

PURPOSE:To more accurately execute image area adjustment and image density adjustment by executing correction scanning for correcting the sensitivity of optical sensors, storing the optical sensor generating an abnormal output in a storage means as the result of the correction scanning and invalidating the use of data in the optical sensor generating the abnormal output. CONSTITUTION:Correction scanning for correcting the sensitivity of the optical sensors S1-Sn, the optical sensor generating an abnormal output is stored in a storage means (RAM 19) and the use of data in the optical sensor generating the abnormal output is invalidated. Even if the sensitivity of the optical sensors S1-Sn is dispersed, the dispersion can be corrected by executing the correction scanning for entering correction data for correcting the sensitivity of the optical sensors S1-Sn. The optical sensor having extremely abnormal data is stored in the storage means 19 and the use of the data is inhibited, so that image area adjustment and image density adjustment can be accurately executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an information recording device such as a microfilm printer, and more particularly to an information recording device in which a plurality of optical sensors are arranged.

(Prior Art) Conventionally, this type of information recording device has a recording area control function that detects an image area of an information recording medium such as a microfilm, and controls an area to be recorded according to the detected image area; The apparatus includes an image density adjustment unit that detects the image density of the microfilm and adjusts the density to be recorded according to the detected image density. Here, the image on the microfilm is detected by a linear array of optical sensors.

(Problem to be Solved by the Invention) However, in such a conventional example, if there are variations in the sensitivity of each optical sensor, the recording area control function and the image density adjustment function will malfunction, causing the image area adjustment to be difficult. There was a problem that image density adjustment was not performed accurately.

Therefore, the present invention was made to solve the above-mentioned problems of the conventional example, and its purpose is to be able to correct the sensitivity of the optical sensor even if the sensitivity of each sensor varies. Moreover, it is an object of the present invention to provide an information recording device that does not use data from an optical sensor that has an abnormal output.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a correction scan for correcting the sensitivity of the optical sensors in an information recording device in which optical sensors are arranged in a linear manner. In this correction scan, the optical sensor whose output is abnormal is stored in the storage means, and the data of the optical sensor whose output is abnormal is not used.

(Function) In the present invention having the above configuration, even if there is variation in the sensitivity of the photosensor, it can be corrected by performing a correction scan to import correction data for correcting the sensitivity of the photosensor. In addition, photosensors with extremely abnormal data are stored in the storage means so that the data will not be used in the future.

(Example) The present invention will be explained below based on illustrated embodiments.

FIG. 1 shows a microfilm printer as an embodiment of the information recording device according to the present invention. In FIG. A scanning mirror arranged to form an @ symbol, 4 a photosensitive drum as an image recording medium,
Reference numeral 5 designates a shutter base disposed above the photosensitive drum 4 and having a slit 6 along its axial direction, 7 a primary charger, 8 a developing device, 9 a transfer charger, and 10 a fixing device.

By moving the scanning mirror 2.3 in the direction of the arrow, the image on the microfilm P can be changed from an image on line segment aa to an image on b-b, as shown in FIG.
The image on C-C is scanned and exposed sequentially onto the photosensitive drum 4,
An image is recorded on the transfer material P by a well-known electrophotographic process.

The shutter base 5 is provided with a slit 6 along the axial direction of the photosensitive drum 4 as shown in FIG. A pair of shutter plates 1 for controlling the exposure area of
1.12 is provided. These shutter plates 11
．． 12 is formed in the form of an opaque film and is rewindably wound around the drive shaft 15.16 of the pulse motor 13.14. The opening width can be changed from both ends. Further, on the bipedal shutter base 5, optical sensors S1 to Sn, which serve as image detection means using amorphous silicon or the like, are fixed at predetermined intervals.

FIG. 4 is a block diagram showing the control system.
Si-Sn is the optical sensor, 17 is an A/D converter, 18 is a microcomputer as a control means, 19
2 is a RAM as a storage means, 20 is a buffer battery for backing up the RAM 19, 21 is a developing device 8, and a secondary charger 7.
22 is an exposure section that controls the opening length of the slit 6, 23 is a regulator that controls lighting of the projection lamp l, and 25 is an optical sensor 51 to
A mode changeover switch for switching Sn to normal mode or correction mode; 1 indicates the projection lamp. That is, in this embodiment, the detection of the image area and the detection of the image density are performed using one image detection means.

In the above configuration, the information recording apparatus according to this embodiment has optical sensors 51 to Sn as shown in FIGS. 5 and 6.
A correction scan is performed. That is, the microfilm F is removed and in steps ① and ② shown in Fig. 6,
With the predetermined amount of light incident on the entire area, set the mode changeover switch 25 shown in FIG. 4 to the correction mode side, and
The data is imported as shown in FIG. 7, and similarly calculate the average data 0 to y for the optical sensors 52 to Sn.Next, in step 2, standard data D stored in advance in the program of the microcomputer 18 is used, Calculate each sensor and store it in the RAM 19 in step (2).If 63m is greater than the constant C in step (2), it is determined that the optical sensor S11 is abnormal, and m'' is stored in the RAM 19 as the abnormal sensor number. Store it.

Here, since the above correction data ΔS1 to ΔSn are backed up in the RAM 19 by the battery 20, they will not be erased even if the power of the device is turned off.After this correction scan is completed, set the mode selector switch 25 to the normal side. put.

In addition, when actually printing, the scanning mirror 2.3 is pre-scanned (pre-scanned) prior to image exposure on the photosensitive drum 4, and after data is loaded onto the RAM 1Q, the data is first scanned in step (3). Row data (data to sensor)
By multiplying all values by ΔSk, variations in sensitivity of the optical sensor-Sk are corrected. Similarly to this, the optical sensor
Perform up to S1"Sn0, then step ■ to adjust image density (AE opening control and image area adjustment (automatic frame erasing control)
etc. At this time, the data of the optical sensor-Sm is
Do not ignore and use it in AE control or automatic frame erasing control.

The microcomputer 18 then adjusts the lighting voltage of the projection lamp 1 via the regulator 23 based on the average image density data so that an image of appropriate density is recorded.

Furthermore, the microcomputer 18 controls the developing bias B to 0N10FF by opening and closing the relay R shown in FIG. It is controlled by whether or not toner development is performed. Further, in the axial direction of the photosensitive drum 4, the opening length of the slit 6 is controlled by driving pulse motors 13 and 14 shown in FIG. 4 to wind or unwind the shutter plates 11 and 12. In this state, scan the scanning mirror 2.3 and set the relay R to 0N10F as appropriate.
FL, an image is recorded on the transfer material P.

In the illustrated embodiment, the image recording area in the circumferential direction of the photosensitive drum 4 is developed using a developing bias of 0N10FF, but the invention is not limited to this. It is also possible to move the developing device toward and away from the photosensitive drum, or to move the image recording area in the axial direction of the photosensitive drum 4 by moving the shutter plate. Of course, it is also possible to use .

Further, in the illustrated embodiment, the case where the microfilm has a negative image has been described, but the present invention is also applicable to the case where the microfilm has a positive image.

(Effects of the Invention) The information recording device according to the present invention has the above-described configuration and operation, and performs a correction scan to take in correction data for correcting the sensitivity of the photosensor, so there is no variation in the sensitivity of the photosensor. Even if there is a problem, the sensitivity of the optical sensor can be corrected, and the data from the optical sensor with abnormal output is not used, so image area adjustment and image density adjustment can be performed more accurately. play.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of an information recording device according to the present invention, FIG. 2 is an explanatory diagram showing a scanning state of an optical sensor, and FIG. 3 is a perspective view showing the main parts of FIG. 1. FIG. 4 is a block diagram showing the control system, FIG. 5 is an explanatory diagram showing image illuminance data, and FIG. 6 is a flow chart showing the operation of the control system. Explanation of symbols 18...Microcomputer 19...=-RAM 20...Battery 25...Mode switching -I, TsuchiF...Microfilm S1-Sn...Optical sensor Patent applicant Canon Corporation・−゛Representative Patent Attorney Quantity Yoshikazu Shin ゛−Representative Patent Attorney Back 1) Regulations,'(・Figure 2Cb a・b Figure 5Figure 6

Claims (1)

[Claims] In an information recording device in which optical sensors are arranged in a straight line, a correction scan is performed to correct the sensitivity of the optical sensor, and in this correction scan, optical sensors whose output is abnormal are stored in a storage means, and optical sensors whose output is abnormal are stored in a storage means. An information recording device characterized in that data of is not used.