JPH0384735A - Optical information recording device - Google Patents

Abstract

PURPOSE:To prevent the adhesion of dirt and dust, etc., on an objective lens and also to prevent the occurrence of problems such as the breakage of a leaf spring and the deterioration of vibration characteristics, etc., caused by disturbance vibration by pressing an objective lens system against the surface part of an optical information recording medium and always keeping them in a contact state. CONSTITUTION:The device is provided with the objective lens systems 17 and 20 for condensing a luminous flux so as to form a light spot on the optical information recording medium 5, and pressing means 12a and 12b for pressing the objective lenses 17 and 20 against the surface part of the optical information recording medium 5. And the objective lens systems 17 and 20 of the optical information recording medium 5 are always pressed against the surface part of the optical information recording medium 5. Thus, it is difficult to be influenced by the disturbance vibration and a gap between the objective lens systems 17, 20 and the optical information recording medium 5 is not formed, so that the adhesion of the dirt and the dust on the objective lens 20 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical information recording device, and particularly to an optical information recording device applicable to still cameras and the like.

[Conventional technology]

In recent years, still cameras that record image information on magnetic disks such as floppy disks have already been commercialized instead of cameras that record image information on photographic film.

However, the storage capacity of a floppy disk is IMb
yte, and the storage capacity is small for recording image information. Therefore, it is desired to commercialize a camera using an optical disk having a storage capacity of about 100 Mbytes.

By the way, optical information recording devices using optical discs are already available in compact discs (CDs), compact disc videos (CDVs), and laser visual discs (LVs).
) etc. have been commercialized.

An example of it being installed in a camera has not yet been announced. this is,
This is because various problems arise when a conventional optical information recording device is mounted on a camera.

[Problem to be solved by the invention]

Hereinafter, a basic configuration example of a conventional optical information recording device and its drawbacks will be explained.

Here, FIG. 14 is a schematic diagram showing an example of a conventional optical information recording device, and the reference numeral 60 in the figure is an optical disk as an optical information recording medium, and this optical disk 60 is inside the optical information recording device. is fixed to the rotating shaft of a spindle motor 61 and rotated by the motor 61.

Further, reference numeral 62 is an optical pickup for recording and reproducing information on an optical disc.
is movable in the radial direction of the optical disc 60 by a seek motor (not shown).

Inside the optical pickup 62, there is a semiconductor laser 63ε as a light source, and a collimator lens 64 for converting the laser beam emitted from the semiconductor laser 63 into parallel light.
and Bee Melon Splitter 65. ; an input optical system ε consisting of an L/4 plate 66, a reflecting mirror 67, and an objective lens 68; an h-roidal lens 69 with astigmatism; A signal detection optical system consisting of a light receiving element 70 is equipped. Here, the objective lens 68 is supported by a spring 71, and is driven by a linear motor (not shown) in the optical axis direction of the objective lens 68 (
Focusing),! : It is movable in the radial direction (tracking) of the optical disc 60, and the optical spot is focused on the optical disc 60 by focusing control, and the optical spot follows the information track of the optical disc 60 by tracking control. It has become.

In the conventional optical information recording apparatus having the configuration shown in FIG. 14, the objective lens 68 is supported by a spring 71 having two vibration systems for focusing and tracking. , L is susceptible to disturbance vibration.

In addition, dirt and dust may be collected from the optical pickup 6 from the gap in the spring 71 or the magnetic gap in the linear motor.
There is also the problem that it can penetrate into the interior of the optical system and adhere to optical components. That is, in the conventional optical information recording device, since the objective lens 68 is driven by an actuator consisting of a linear motor and a support mechanism such as an ε spring, dirt and dust may enter the inside of the optical pickup 62 from spaces such as gaps. Therefore, problems such as the light beam being diffusely reflected by dirt, dust, etc. may occur, which causes deterioration of the detection signal.

Therefore, due to the above-mentioned drawbacks, when the conventional optical information recording device is mounted on a camera and used, the following problems arise.

That is, the optical disc is provided with track guide means (groups, wobble pits, etc.) in advance, and the track guide means performs a tracking operation in which the light spot is followed, and a focusing operation in which the light spot is formed by aligning the focal point with the optical disc. In order to perform the operation, the objective lens is moved in two directions, but because of this, the objective lens is supported by an elastic member such as a leaf spring and is vulnerable to external vibrations. When mounted on a camera, etc., which is subject to high-speed operation, a problem arises in that the disturbance vibration is so large that it cannot withstand use.

In addition, when recording information on an optical disk, information is recorded by condensing a beam of light onto the optical disk to form a light spot, and heating the recording section with this light spot. If it adheres to optical elements such as lenses and prisms, the amount of light decreases, heat generated by the light spot decreases, and good information recording characteristics cannot be obtained. especially,
Since cameras can be used in any environment, it is easy for dirt, dust, etc. to get into the device (which poses a problem).

In addition, the optical disc is provided with track guide means (groups, toothed pull pits, etc.) in advance, but for this reason, a manufacturing process is required to provide the track guide means on the optical disc using a master exposure machine or the like. Therefore, the cost is higher than that of floppy disks, etc. In particular, when used in cameras, optical discs are much more expensive than film L, preventing the market from expanding and hindering commercialization.

The present invention has been made in view of the above circumstances, and it is possible to use an optical information recording medium that is resistant to external vibrations, dirt, dust, etc., and can be manufactured at a relatively low cost, and is suitable for use in cameras, etc. It is an object of the present invention to provide an optical information recording device that can be easily installed.

[Means to solve the problem]

In order to achieve the above object, the present invention provides an optical information recording device that records information by condensing a beam of light on an optical information recording medium, in which a beam of light is condensed to form a light spot on the optical information recording medium. The present invention is characterized in that it comprises an objective lens system, and a pressing means for pressing the objective lens system against the surface portion of the optical information recording medium.

Further, in the present invention, in the optical information recording device, portions with different reflectances are provided at regular intervals on the recording surface of the optical information recording medium, and portions with different reflectances of the optical information recording medium are detected during information recording. , the information recording operation is started after the light spot passes through the portions with different reflectances.

Further, in the present invention, in the optical information recording device, the optical information recording medium that has been inserted into the device once and information has been recorded thereon is recorded to indicate that it is not in an unrecorded state, and the optical information recording medium is retained in the case. This type is characterized in that the case side is also provided with means for indicating whether or not the optical information recording medium is in an unrecorded state.

[For production]

According to the present invention, since the objective lens system of the optical information recording device is always pressed against the surface portion of the optical information recording medium, it is less susceptible to disturbance vibrations, and the relationship between the objective lens system and the optical information recording medium is Since there is no gap between the two, dust, dirt, and other particles are prevented from adhering to the objective lens.

Further, according to the present invention, there is no need to provide conventional track guide means such as groups or wobble pits on the optical information recording medium, and only portions with different reflectances are provided at regular intervals on the recording surface of the optical information recording medium. Therefore, the manufacturing process of the optical information recording medium can be simplified and costs can be reduced.

Further, according to the present invention, since the optical information recording medium once inserted into the device and recorded with information is recorded to indicate that it is not in an unrecorded state, overwriting of information is prevented, and optical If the information recording medium is held in a case, the case is also provided with means for indicating whether or not the optical information recording medium is in an unrecorded state, so it is easy to confirm whether or not the optical information recording medium is in an unrecorded state. Become.

[Example] Hereinafter, the present invention will be explained in detail based on the illustrated example.

FIG. 1 is a schematic configuration diagram of an image photographing device (for example, a still camera) showing an embodiment of the present invention, in which reference numeral 1 indicates a camera lens, and reference numeral 2 indicates a COD image sensor.
An object to be photographed is projected onto a CCD 2 by a camera lens 1. The image read by the CCD 2 is converted into an electrical signal.

It is converted into digital information via the image information processing device 3 and recorded on the optical disk 5 by the optical disk device 4.

This optical disc 5 is a write-once type that allows recording only once, and is excellent in reliability and long-term storage. Second
The figure shows a cross-sectional view of the optical disc 5. In Figure 2, the reference numeral 7 in the figure is a recording layer, and information is recorded by forming a hole by condensing a light beam onto this layer u7 and forming a light spot. . Further, reference numeral 6 is a protective layer for protecting the recording layer 7 from temperature and scratches, and reference numeral 8 is a transparent substrate made of hard glass, hard light-transmitting resin, or the like. During information recording, information is recorded with the optical head pressed against the surface of the transparent substrate 8.

FIG. 3 is a schematic configuration diagram of the optical disk device 4 according to the present invention, in which reference numeral 9 is a turntable for mounting and rotatably holding the optical disk 5, and numeral 10 is a turntable for holding the optical disk 5 via the turntable 9. This is a spindle motor for rotation. Reference numeral 11 is a frame of the optical disk device 4, and this frame 11 includes springs 12a, 12.
A stand 13 is mounted which is elastically supported by b. Here, one unit 13 is a guide ll formed integrally with the frame 11.
a and llb, the portion is movable only in the direction facing the surface of the optical disc 5. Furthermore, an optical head 14 is mounted on the stand 13 and is movable in the radial direction of the optical disc 5.

The optical head 14 is moved in the radial direction of the optical disk 5 by a motor 15 fixed to the stand 13 via a screw L2. This optical head 11 includes an objective lens system in which an objective lens 20 and a slider 17 made of diamond are integrated, and the slider 17 of this objective lens system is supported by a spring 12a.

12b, it is pressed against the transparent substrate of the optical disc 5. Therefore, the light flux forms a light spot on the recording layer 7 via the objective lens 20, the slider 17, and the transparent substrate 8 of the optical disc 5.

Figure 1 is a diagram showing the general configuration of the optical head 14, and the optical path and operation of the optical head 14 will be explained below.

The diverging light emitted from the semiconductor laser 18, which is the light source, is reflected by the parallel plate 23, bends the optical path in the direction of the optical disk (media) 5, and passes through the lens 9, which is movable in the axial direction, to the objective. In-lens objective lens 20.
A light spot 21 is formed on the recording M7 of the medium 5 by a slider 17 made of diamond. The light beam forming the light spot 21 is reflected by the recording layer 7, and is reflected by the slider 17. Transmitted through the parallel plate 23 through the objective lens 20,
The focused light has astigmatism and enters the light receiving element 24. FIG. 5 shows an example of the shape of the light receiving element 24, and the light receiving element 24 in this example has four light detection surfaces 24a, 24b,
When the light spot 21 is formed on the recording layer 7 (in focus), a round spot 25a is incident on the light detection surface of the light blocking element 24. *When the optical spoiler 1-21 is far away from a'i (out of focus), an elliptical spoiler h2 is formed on the light detection surface of the light receiving element 24.
51) or 25c is incident. Therefore, using the output from each photodetection surface 24a, 24b, 24e, 24d, (24a + 24d) - (24b + 24
By the calculation in e), the positional relationship between the light spot 21 and the recording layer 7 becomes clear. This is an optical focus detection method based on the so-called astigmatism method, (24a+24d) −(24
Focusing of the optical spot 21 is performed using the focus error signal obtained from the calculation of b+24e).

Here, the principle of the focusing method will be explained with reference to FIG. In addition, in FIG. 6, in order to simplify the explanation, the slider 17 and the objective lens 20 of the objective lens system will be replaced with a single biconvex lens 26.

In FIG. 6, the light beam emitted from the semiconductor laser 18 is narrowed down by the lens 19, and the objective lens 2
6 and forms a light spot. Here, lens 1
When the lens 9 is moved by X in the optical axis direction, the optical spoiler 1- caused by the objective lens 26 is moved by X'. Therefore, by moving the lens 19 in the optical axis direction 1, the light spot can be focused (focusing operation).

FIG. 7 is a diagram showing an example of a focus actuator 22 that moves the lens 19. In the figure, the lens 19 is housed in a lens barrel 27. A coil 30 is wound around the outer periphery of the lens barrel 27, and the lens barrel 27 is supported by a sliding bearing 3j so as to be movable in the optical axis direction.

A permanent magnet 29 is arranged around the coil portion 30 of the lens barrel 27 with a predetermined gap therebetween and is supported by the yoke 28.
This permanent magnet 29 has a ring shape and is magnetized in the radial direction. Therefore, a magnetic circuit is formed by the permanent magnet 29 and the yoke 28H, and the coil 30 is installed in the magnetic circuit J1 to form a so-called voice coil motor.

Next, referring to FIG. 8, the recording format of the optical disc 5 will be explained in 2.

FIG. 8 is a plan view showing an example of the optical disk 5 according to the present invention. In the figure, the optical disk 5 is formed in a disk shape, and a hole in the center indicated by reference numeral 36 is connected to the axis of the spindle motor 10. This is a hole for mounting. Reference numeral 34 indicates the innermost circumference of the recording area, and reference numeral 32 indicates the outermost circumference.
Also, let LB be the track length required to record the images.

The optical disc 5 is provided with a lens barrel 35 having a high reflectance for each track length L8, and when recording information, the mirror surface 35 is
is detected and one image image is recorded from it. That is, since the amount of reflected light increases at the mirror surface portion 35, the total amount of light received by the light receiving element 24 in FIG. 5 (24a +
24b + 24c + 24d), the position of the mirror surface 35 can be easily detected, and one image is recorded from this position of the mirror surface 35 as a recording start point. Note that reliability can be improved by recording one image on several LBs in consideration of defects, recording errors, etc. of the optical disc 5. That is, L8 corresponds to the conventional I sector.

The mirror surface 35 means a sector mark.

Next, the tracking method will be explained. The optical disc 5 is not provided with conventional tracking guide means such as track guide grooves or wobble pits, and only the mirror surface 35 described above is generally sharpened. In addition, optical head 1
4 in the tracking direction (radial direction of the optical disc 5) is performed by a screw 16 rotated by a motor 15 in FIG. With this optical head feed mechanism of 8%, the optical head 14 moves from the inner circumference to the outer circumference and records sequentially. In other words, unlike conventional write-once optical recording, random access is not performed, and therefore, information tracks are formed by the above-mentioned feeding mechanism.In addition, when not in operation, the optical disc 5 is held between the media presser 37 and the spring 38.
and is pressed by the spring 12a.

Since the slider 17 is pressed against the optical disc 5 by the slider 12b, the optical head 14 does not shift in the radial direction of the optical disc 5.

By the way, since the spindle motor 10 has a simple structure, the optical disk 5 is rotated at a constant speed. Although this is the so-called CAV system, the storage capacity is reduced, so as shown in FIG. 8, the outermost recording area 32. With the boundary 33 at the middle of the innermost periphery 34 as a border, the setting of the mirror surface 35 is changed so that the interval LB and "" of the mirror surface 35 are equal to each other.
In place of the above-mentioned mirror surface 35, a deep groove or a portion with low reflectance may be provided.

Next, the slider 17 of the objective lens system will be explained. As mentioned above, the slider 17 is pressed against the transparent substrate 8 of the optical disc 5. The slider 17 is made of diamond and is therefore hard, and therefore the transparent substrate 8 is made of hard glass to withstand it. FIG. 9 is a diagram showing an example of the shape of the slider 17. As shown in the figure, the peripheral end 39 of the contact surface of the slider 17 with the transparent substrate 8 is rounded (or tapered chamfered). This prevents the transparent substrate 8 from being damaged by the sharp edge of the slider 17.

FIG. 10 shows another embodiment of the slider 17, in which a tapered protrusion 40 is provided on the slider 17 side so that dust 41 attached to the transparent substrate 8 can be removed.

Incidentally, information pits are formed in a spiral shape on the optical disk 5 on which images and the like are recorded by the optical disk device 4 of the present invention described above by the spindle motor 10 and the feeding mechanism of the screw screw 16. - remove the optical disc 5 from the optical disc device 4;
If an attempt is made to continue recording information by inserting the disk into the optical disk device 4 again, a problem arises in that the disk is misaligned when placed on the spindle motor 10, causing the disk to be offset from the already recorded spiral information pits. Additionally, there is a risk that new information will be recorded (overwritten) on top of previously recorded information. Therefore, it is necessary to take the following two measures.

i) An optical disc that has been recorded twice is prevented from entering the optical disc device 4 again, regardless of the amount of recording.

n) By detecting the already recorded part and starting recording after passing through a certain section of unrecorded part, overwriting (cross-tracking) of the already recorded part due to eccentricity can be avoided.

However, in any case, it is necessary to detect whether or not it is in an unrecorded state. Therefore, this detection means will be explained with reference to FIGS. 11 and 12.

In FIG. 11, the optical disc 5 is rotatably held in a case 42, and the case 42 is provided with a hole 44 for pressing the slider 17 against the transparent substrate 8 of the optical disc 5. is closed by a seal 43 when no recording is performed. Therefore, the user must peel off the seal 43 before inserting the case 42 into the optical disk device 4. That is, the peeled off sticker 43 becomes a used limp, and it can be easily confirmed whether or not it is in an unrecorded state.

Further, as a second embodiment, in FIG.
A slidable plate 46 is provided on the side surface of the
A mirror surface is provided on the surface of the plate 46, and the optical sensor 47 detects the
This is an example of detecting the slide position. Here, the arrow direction in FIG. 12 indicates the direction in which the case 45 is taken out (ejection direction), and the reference numeral 48 is a protrusion for sliding the plate 46, which is pressed toward the case 45 by a spring 49. There is. In other words, once it is ejected,
The plate 46 slides along the side surface of the case 45 by the protrusion 48 in conjunction with the ejecting operation. Therefore, when this case 45 is placed into the device next time, the position of the mirror surface has moved with the movement of the plate 46, so the optical sensor 45 has moved.
7, the mirror surface portion of the plate 46 cannot be detected, so it can be seen that the case 45 is used, and it can be easily confirmed whether or not it is in an unrecorded state.

Incidentally, on the optical disk 5 on which information is recorded by the optical disk device 4 according to the present invention, information bits are formed in the above-mentioned spiral shape. Therefore, in order to reproduce information, a separate reproduction device is used. At this time, H-racking can be performed by a three-beam method (for example, the general l-ranking method used in CDs, etc.).

As explained above based on the embodiments, according to the present invention, the objective lens of the optical disk device (including a part of the slider) is always pressed against the surface of the optical disk, so Since there is no gap between the objective lens and the optical disk, it is possible to prevent dirt, dust, etc. from adhering to the objective lens. Therefore, according to the present invention, it becomes possible to easily mount an optical disk device on a camera or the like.

In addition, according to the present invention, there is no need to provide conventional track guide means such as groups or wobble pits on the optical disc (it is only necessary to provide portions with different reflectances at regular intervals on the recording surface of the optical disk, It is possible to simplify the manufacturing process that has been used for optical discs for a long time, and to reduce costs.Therefore, according to the present invention, the price of optical discs can be reduced.
Even when installed in a camera, it can be easily commercialized.

Note that the present invention is not limited to optical disk devices mounted on cameras, but can be similarly applied to optical disk devices used in other ways.

Regarding the focus detection method, in the illustrated embodiment, the astigmatism method using the parallel plate 23 has been explained, but the method is not limited to this method. It is also possible to use other focus detection methods, such as the beam size method.

By the way, in the above-mentioned embodiment, the case where the novel optical disk shown in FIG. It is also possible to implement only claim 1 of the invention. In other words, an optical disc is provided with track guiding means such as a conventional group or wobble pit, and a compact disc (CD
) 3-beam method commonly used in players, etc.

Tracking error detection may also be performed using a push-pull method, a sample servo method, or the like.

Here, an example using the three-beam method is shown in FIG. 13. In FIG. 13, the reference numeral 50 in the figure is a grating plate for dividing the light beam emitted from the semiconductor laser 18 into three light beams. It is well known for. Further, the reference numeral 51 in the figure is a light receiving element, which consists of a detection surface 51a, 5Le, and 51b divided into four. This is a light receiving element for general (3 beam method + astigmatism method),
Based on the tracking error signal obtained from the light receiving element 51, the movement of the optical head 14 is controlled by the motor 15° screw 16.

Note that tracking error detection using the push-pull method or sample servo method can also be applied in the same way as the conventional ε, so by performing tracking control (the light spot follows the information track) in the same way as the conventional method ε, as described above, Not only information recording operation but also information reproducing operation becomes possible.

〔Effect of the invention〕

As explained above, in the optical information recording apparatus according to the present invention as set forth in claim 1, the objective lens system configured to integrate an objective lens for forming a light spot and a slider made of a light transmitting member is used for optical information recording. Because it is pressed against and in constant contact with the surface of the recording medium, dirt and dust do not adhere to the objective lens, and unlike conventional optical heads, the objective lens is not supported by a leaf spring. Therefore, problems such as damage to the leaf spring and deterioration of vibration characteristics due to external vibration do not occur. Therefore, according to the present invention, it becomes possible to easily mount an optical information recording device in a device that is used in a harsh environment, such as a camera.

In the optical information recording medium used in the optical information recording device, the surface member is made of hard glass or hard light-transmitting resin, so even if the light-transmitting member of the objective lens system comes into contact with the surface portion, Due to its high rigidity, it is possible to prevent damage to the optical information recording medium and improve reliability.

Further, by chamfering the light transmitting member, it is possible to prevent damage to the optical information recording medium. Further, when the end portion of the light transmitting member is made to protrude in a tapered shape, it is also possible to remove dust, dust, etc. adhering to the surface of the optical information recording medium.

Furthermore, the surface member of the optical information recording medium can be made of soft glass or soft light-transmitting resin. This prevents damage caused by such things.

Next, in the optical information recording device according to the present invention described in itF claim 2, there is no need to provide the optical information recording medium with conventional track guide means such as groups or wobble bits, and there is no need to provide the optical information recording medium with a constant track guide means such as a group or wobble bit. Since portions with different reflectances are simply provided in different sections, the manufacturing process of the optical information recording medium can be simplified and costs can be reduced. Also,
In an optical information recording device using the above-mentioned optical information recording medium, a mirror surface portion with high reflectance is detected, and the information recording operation is started after the light spot passes through the mirror surface portion with high reflectance. Know. So-called cueing becomes easier.

Next, in the optical information recording device according to the present invention as set forth in claim 3, since the optical information recording medium that has been inserted once and recorded with information is recorded to indicate that it is not in an unrecorded state, the information overwriting is prevented. In addition, if the optical information recording medium is of a type that is used while being held in the case, a means is provided on the case side to indicate whether or not it is in an unrecorded state, so the user can easily check whether or not it is in an unrecorded state. can be confirmed.

As described above, according to the present invention, it is possible to provide an optical information recording device that is excellent in environmental resistance, highly reliable, and inexpensive. Therefore, according to the present invention, it is possible to realize a still camera or the like that is equipped with an optical information recording device and has a large storage capacity.

[Brief explanation of drawings]

Fig. 2 is a sectional view showing an example of an optical information recording medium according to the invention, and Fig. 3 is an optical information recording medium according to the invention. 4 is a schematic configuration diagram showing an example of the optical head of the optical information recording device according to the present invention; FIG. 5 is a light receiving element applied to the optical head shown in FIG. 4. FIG. 6 is a plan view showing an example, FIG. 6 is a diagram for explaining the principle of the focusing method using the optical information recording device according to the present invention, and FIG. 7 is a diagram showing an example of the drive mechanism for driving the focusing lens. , FIG. 8 is a plan view showing an example of the optical information recording medium according to the present invention, FIGS. 9 and 10 are views showing examples of the shape of the light transmitting member of the objective lens system, and FIGS. FIG. 13 is a schematic configuration diagram showing another example of the optical head of the optical information recording device according to the present invention, and FIG. 14 is a conventional one. 1 is a schematic configuration diagram showing an example of an optical information recording device according to the technology. l... Camera lens, 2... COD image sensor, 3... Image information processing device, 4... Optical information recording device, 5... Optical information recording medium, 6... ...Protective layer, 7...Recording layer, 8...Transparent substrate, 9...
・Turntable, lO...Spindle motor, 1
1...Frame, 12a, 12b...Spring,
13... stand, 14... optical head, 15...
Motor, 16...Screw screw, 17...Slider, 18...Semiconductor laser, 19...Lens for focal position adjustment, 20...Objective lens, 21...
... Light spot, 22 ... Hookah actuator, 23 ... Parallel plate, 24.51 ...
Light receiving element, 26...Objective lens system, 35...Mirror surface section, 42.45...Case. Fig. Fig. Fig. Fig. Fig. Fig. Fig. 5 Fig. Fig. 0 Fig. 9 Fig. 1 Fig. 2

Claims (1)

[Claims] 1. In an optical information recording device that records information by condensing a beam of light onto an optical information recording medium, an objective lens for condensing the beam of light and forming a light spot on the optical information recording medium. What is claimed is: 1. An optical information recording device comprising: a lens system; and pressing means for pressing the objective lens system against a surface portion of the optical information recording medium. 2. The optical information recording device according to claim 1, wherein portions with different reflectances are provided at regular intervals on the recording surface of the optical information recording medium, and when recording information, the portions with different reflectances of the optical information recording medium are detected. , an optical information recording device characterized in that an information recording operation is started after a light spot passes through portions having different reflectances. 3. In the optical information recording device according to claims 1 and 2, the optical information recording medium that has been inserted into the device and on which information has been recorded is recorded to indicate that it is not in an unrecorded state; If the optical information recording medium is held in a case, a means for indicating whether or not the optical information recording medium is in an unrecorded state is also provided on the case side.