JPH05107435A - Adjusting device for optical part - Google Patents

Abstract

PURPOSE:To facilitate the control of a movement of the optical part with a high degree of accuracy by causing a contact part formed of a piezoelectric element and supported by a fixing part, to press and move the optical part in accordance with an applied voltage. CONSTITUTION:A frame member is attached to a photo diode support plate 106 by means of contact members 1a through 1d. Further, the movement in a sidewise direction (X-axial direction) is made by supplying a power to the contact members 1a, 1b. That is, when a voltage in the expansion direction is applied to the contact member 1a while a voltage in the contract direction is applied to the contact member 1b, a pressing force is applied to the photo diode support plate 106 which is therefore moved in the rightwise direction. If the inertia mass of the frame member is sufficiently large, the frame member is not substantially moved, and accordingly, the photodiode support plate 106 is alone moved in the rightwise direction. The movement in the vertical direction (Y-axial direction) is made similarly by supplying a power to the contact members 1c, 1d. Thus, a photo diode 109 is moved and the optical output thereof is monitored so as to be set at a predetermined position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical component adjusting device for moving and adjusting various optical components constituting an optical pickup device or the like.

[0002]

2. Description of the Related Art Conventionally, various optical devices such as an optical pickup device have been proposed. This optic is a lens,
It has various optical components such as a prism, a mirror, a light emitting diode, a laser diode, a photodiode, etc., and is configured to exert a desired effect by refracting, reflecting, emitting, and receiving a light beam in each of these optical components.

In order to bring out the desired effects in this optical device, it is necessary that the above-mentioned optical components are arranged at predetermined relative positions. Therefore, in manufacturing this optical device, movement adjustment of each of the optical components is performed.

The movement adjustment of these optical components is performed by using a rod-shaped tool such as a screwdriver to move each optical component with respect to the housing supporting these optical components. For example, a tool engaging hole is provided in the above optical component,
By inserting and engaging the tip end side portion of the tool in the tool engagement hole, the optical component can be moved through the tool.

In Japanese Utility Model Publication No. 63-30801, as an adjusting device for an optical component, a columnar main shaft and a projection provided at the tip of the main shaft at a position eccentric to the main shaft are provided. Those having mating protrusions are described.
In this adjustment device, the engagement protrusion is engaged with the optical component, and the main shaft is rotated about the axis of the main shaft, whereby the optical component can be moved to perform position adjustment.

In the above-mentioned optical equipment, while moving the respective optical parts in this manner, the optical action obtained by these optical parts, that is, the converging state of the luminous flux and the like are detected, so that the respective optical parts are detected. It is possible to perform a position adjustment in which is a predetermined relative position.

[0007]

In the adjusting device for an optical component as described above, the force of the finger of the adjusting operator is used as the driving force for moving the optical component. Therefore, moving the above-mentioned optical components by a desired minute distance is a difficult task, and is not a task that cannot be performed without a high level of skill. Therefore, the movement adjustment of the above-mentioned optical components is a complicated work, which makes it difficult to manufacture the optical device.

Particularly, in an optical device such as an optical pickup device in which a high degree of positional accuracy of optical components is required and the device configuration is downsized, it is extremely difficult to adjust the position of the optical components. This makes the manufacture of this optical device very difficult.

Therefore, the present invention is proposed in view of the above-mentioned circumstances, and provides an adjusting device for an optical component, which is capable of easily adjusting the movement of an optical component with high precision and a small amount of movement. The purpose is to do.

[0010]

In order to solve the above-mentioned problems and achieve the above-mentioned objects, an adjusting device for an optical component according to the present invention is provided with an abutting portion made of a piezoelectric element and a fixing member for supporting the abutting portion. The contact portion is configured to press and move the optical component contacted by the contact portion in accordance with the supplied voltage.

The adjusting device for an optical component according to the present invention includes an abutting member made of a piezoelectric element and an inertia member supported by the abutting member, and the abutting member abuts on the optical component. The optical component and the inertia member are moved in opposite directions depending on the voltage supplied to the optical member and the inertia member supported by the optical component.

[0012]

In the adjusting device for optical components according to the present invention,
The abutting portion made of a piezoelectric element and supported by the fixed portion presses and moves the optical component with which the abutting portion abuts in accordance with the supplied voltage, so that the optical component is adjusted by adjusting the supply voltage value. It is possible to control the movement amount of.

Further, in the optical component adjusting apparatus according to the present invention, the abutting member made of a piezoelectric element is abutted against the optical component and attached to the optical component to support and supply the inertial member. Since the optical component and the inertial member are moved in the directions opposite to each other according to the voltage, the optical component and the inertial member are moved by a distance inversely proportional to the ratio of their inertial mass.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] An adjusting device for an optical component according to the present invention,
As shown in FIG. 1, it has a contact portion 1 made of a piezoelectric element (piezo semiconductor). This abutting portion is attached to the tip end side of the grip portion 2 which is a substantially cylindrical shape and serves as a fixing portion.

Power is supplied to the contact portion 1 via a power supply cord 3 connected to the base end side of the grip portion 2. A connection plug 4 connected to a power supply device (not shown) is provided on the tip side of the power supply cord 3.

The power source supplied through the power supply cord 3 is applied as a voltage to the contact portion 1. This voltage causes the contact portion 1 to expand and contract in an amount corresponding to the voltage value. The direction of expansion and contraction of the contact portion 1 according to the voltage of the power supply is the axial direction of the grip portion 2, that is, the grip portion 2 from the tip of the grip portion 2.
It is made to appear and disappear in the axial direction.

In order to adjust the position of the optical component by this optical component adjusting device, first, as shown in FIG. 2, the grip portion 2 is fixed with fingers or the like, and the tip of the contact portion 1 is fixed. The part is brought into contact with the optical component. The optical component shown in FIG. 2 is a lens barrel 101, which is formed into a cylindrical shape.
The optical block 2 is inserted into and supported by a support hole 103 formed in the optical block 2. An optical element such as a lens is provided inside the lens barrel 101. The lens barrel 101 is movable along the support hole 103 in the optical axis direction of the optical element arranged in the lens barrel. An adjusting protrusion 104 is provided on the side surface of the lens barrel 101. The adjusting protrusion 104 is the optical block 1 described above.
02 is projected to the outer side of the optical block 102 through the adjustment hole 105. The adjusting hole 1
Reference numeral 05 is formed so as to penetrate from the side portion of the support hole 103 to the side portion of the optical block 102. The adjustment hole 105 has a length in the optical axis direction of the optical element so that the adjustment hole 104 does not hinder the movement of the lens barrel 101 in the support hole 103.
Is larger than the thickness of the optical element in the optical axis direction.

When a power source whose voltage fluctuates in a pulsed manner is supplied to the contact portion 1, the contact portion 1
Expands and contracts in the axial direction of the grip portion 2 according to the fluctuation of the voltage. Then, the tip portion of the contact portion 1 intermittently presses the adjustment protrusion 104, and the lens barrel 101 is moved along the optical axis direction of the optical element as indicated by an arrow A in FIG. Then, the contact portion 1 is moved toward the tip side.

In this way, the lens barrel 101 can be accurately moved by a minute distance in the optical axis direction of the optical element. Then, while detecting the state of the light beam passing through the lens barrel 101, the lens barrel 101 is moved so that the light beam is in a predetermined state, whereby the lens barrel 1
01 is adjusted to a predetermined position.

[Second Embodiment] As shown in FIG. 3, the adjusting device for an optical component according to the present invention includes a frame body 5 serving as an inertia member and a plurality of abutments mounted on the frame body 5. You may comprise by having a member.

The frame body 5 is made of a material having a specific gravity and rigidity such as metal, and is formed into a substantially rectangular frame shape. The contact members are each formed of a piezoelectric element.

The first abutting member 1a is attached to and supported by the frame body 5 on the inner side of one side of the frame body 5. The second contact member 1b is arranged on the inner side of the other side of the frame body 5 so as to face the first contact member 1a. The second contact member 1b is attached to one end of a first rod-shaped screw 6 screwed into a screw hole formed on the other side of the frame body 5. The screw hole into which the first rod-shaped screw 6 is screwed is formed so as to penetrate from the outer surface portion of the other side portion of the frame 5 to the inner portion thereof, and the inner surface portion thereof is a female screw. The first rod-shaped screw 6 is arranged by being screwed into the screw hole from the outer side to the inner side of the other side portion of the frame body 5. The frame 5 of the first rod-shaped screw 6
The photographing member 7 is attached to the other end, which is the outer side of the.

The third abutting member 1c is attached to and supported by the inner side portion of the frame body 5 on the lower side thereof. The fourth contact member 1d is arranged inside the upper side of the frame 5 so as to face the third contact member 1c. The fourth contact member 1d is attached to the lower end portion of the second rod-shaped screw 8 screwed into the screw hole formed in the upper portion of the frame body 5. The screw hole into which the second rod-shaped screw 8 is screwed is formed so as to penetrate from the upper outer surface portion to the inner portion of the frame body 5, and the inner surface portion is a female screw. The second rod-shaped screw 8 is arranged by being screwed into the screw hole from the outer side to the inner side of the upper portion of the frame body 5. The frame 5 of the second rod-shaped screw 8
The photographing member 9 is attached to the upper end side which is the outer side of the.

When the photographing member 7 is rotated, the second abutment member 1b changes the screwing amount of the first rod-shaped screw 6 into the screw hole, and is indicated by an arrow X in FIG. As shown, the frame 5 is moved and operated in a direction in which the frame 5 comes in contact with and separates from the other side. Further, in the fourth contact member 1d, when the photographing member 9 is rotationally operated, the screwing amount of the second rod-shaped screw 8 into the screw hole is changed, which is indicated by an arrow Y in FIG. As described above, the frame 5 is moved and operated in a direction in which the frame 5 is moved toward and away from the upper part.

As shown in FIG. 4, the optical component adjusted by the optical component adjusting device is an outer surface portion of the optical block 102 with respect to the optical block 102, as shown by arrows X and Y in FIG. It is supported so as to be movable in a two-dimensional direction within a plane extending along.

The optical component shown in FIG. 4 is a photodiode 109, which is attached to the photodiode support plate 106. The photodiode 109 is configured to have a light receiving surface portion on the front side, and is attached to the photodiode supporting plate 106 with the front side facing the opening provided in the photodiode supporting plate 106. .. The photodiode 109 has a plurality of lead lines 110 on the rear surface side, and outputs a photodetection output according to the intensity of light received at the light receiving surface portion to the outside through the plurality of lead lines 110. Is configured.

The photodiode support plate 106 is attached to the optical block 102 with the front side of the photodiode 109 facing the optical block 102. A light flux passage hole is provided at a position of the optical block 102 where the light receiving surface of the photodiode 109 faces. This light flux transmission hole is provided in the optical block 1 described above.
This is a hole through which a light beam that has passed through various optical components disposed in 02 is emitted to the outside of the optical block 102. That is, the luminous flux is generated by the photodiode 10
Irradiation is performed on the light-receiving surface portion of 9.

The photodiode supporting plate 106 is attached to the optical block 102 by a pair of setscrews 10.
It is attached by 8, 108. That is, the photodiode support plate 106 is provided with a pair of screw insertion holes, and the set screws 10 are provided in the screw insertion holes.
8, 108 are inserted. The set screws 108, 108 inserted into the respective screw insertion holes are screwed into the screw holes provided in the optical block 102. A pair of washers 107, 10 is provided between the screw heads of the set screws 108, 108 and the photodiode support plate 106.
7 are correspondingly interposed.

The screw insertion holes provided in the photodiode support plate 106 are provided in the respective set screws 108, 108.
Is formed to have an inner diameter larger than the outer diameter of the shaft portion. Therefore, the photodiode support plate 106 is
In the state where the set screws 108, 108 are loosened, the optical block 102 has a distance corresponding to the difference between the outer diameter of the shaft portion of the set screws 108, 108 and the inner diameter of the screw insertion holes. It is designed to be movable along the outer surface.

In order to adjust the position of the photodiode 109 using the optical component adjusting apparatus according to the present invention, first, as shown in FIG. 5, the frame 5 is attached to the contact members 1a, It is attached to the photodiode support plate 106 via 1b, 1c and 1d. The attachment of the frame body 5 to the photodiode support plate 106 is performed by rotating the second contact member 1b to the inner side of the frame body 5 by rotating the first rod screw 6. , The second contact member 1b and the first contact member 1a sandwich the photodiode support plate 106 from the side, and the fourth contact member 1d holds the second rod-shaped screw. By rotating 8 to move inward of the frame 5, the photodiode support plate 106 is moved by the fourth contact member 1d and the third contact member 1c.
Is carried out by sandwiching it from above and below.

Then, the photodiode support plate 10
6, the set screws 108, 108 are slightly loosened, have an appropriate load, and are movable with respect to the optical block 102.

Next, the photodiode support plate 106
5 is moved in the lateral direction indicated by arrow X in FIG. 5 by supplying power to the first contact member 1a and the second contact member 1b. That is, as shown in FIG. 6, a voltage in the extension direction in which the absolute voltage value sharply increases as indicated by P ₁ in FIG. 6 is applied to the first contact member 1a, and at the same time, as shown by P ₂ in FIG. When a voltage in the shortening direction in which the absolute voltage value increases is applied to the second contact member 1b, the photodiode support plate 106 moves in the right direction in FIG. 5 with respect to the frame body 5. Receive pressing force.

Here, if the inertial mass of the frame body 5 is sufficiently large, the frame body 5 hardly moves and only the photodiode support plate 106 is moved in the right direction. Then, the absolute value of the voltage applied to each of the contact members 1a and 1b is gradually reduced to zero,
The frame 5 is moved to a position corresponding to the photodiode support plate 106 so as to follow the photodiode support plate 106.

Further, a voltage in the extending direction in which the absolute value of voltage sharply increases as indicated by P ₁ in FIG. 6 is applied to the second contact member 1b, and the absolute value of voltage sharply increases as indicated by P ₂ in FIG. Is applied to the first abutting member 1a, the photodiode supporting plate 106 receives a pressing force that moves to the left side in FIG. .. Then, the photodiode support plate 1
06 is moved to the left side direction. Then, the absolute value of the voltage applied to each of the abutting members 1a and 1b is gradually reduced to zero, so that the frame body 5 follows the photodiode supporting plate 106 and the photodiodes are moved. It is moved to a position corresponding to the support plate 106.

Then, the photodiode supporting plate 10
6 is moved in the vertical direction indicated by the arrow Y in FIG.
This is done by supplying power to the contact member 1c and the fourth contact member 1d. That is, as shown in FIG.
A voltage in the extending direction in which the absolute voltage value sharply increases as indicated by P ₁ in FIG. 6 is applied to the third contact member 1c, and
When a voltage in the shortening direction in which the absolute voltage value sharply increases as indicated by P ₂ in FIG. 6 is applied to the fourth contact member 1 d, the photodiode support plate 106 causes the frame body 5 to move with respect to the frame body 5.
It receives a pressing force that moves upward.

Here, the frame 5 is hardly moved, and only the photodiode support plate 106 is moved upward. Then, the absolute value of the voltage applied to each of the abutting members 1c and 1d is gradually reduced to zero, so that the frame body 5 follows the photodiode supporting plate 106 and the photodiode It is moved to a position corresponding to the support plate 106.

Further, a voltage in the extending direction in which the absolute value of voltage sharply increases indicated by P ₁ in FIG. 6 is applied to the fourth contact member 1d, and the absolute value of voltage sharply increases in P ₂ in FIG. Is applied to the third contact member 1c, the photodiode support plate 106 receives a pressing force that moves downward relative to the frame body 5. Then, the photodiode support plate 106
Are moved downward. And each contact member 1
The absolute value of the voltage applied to c and 1d is gradually reduced to zero, so that the frame body 5 follows the photodiode support plate 106 and is positioned at a position corresponding to the photodiode support plate 106. Is moved up to.

In this way, the photodiode 10 is
The position of the photodiode 109 can be set to a predetermined position by monitoring the light detection output from the photodiode 109 while moving 9 along the outer side surface of the optical block 102. The photodiode 109 has the set screws 108, 108.
The optical block 102 is positioned and fixed to the optical block 102 by tightening.

The adjusting device for an optical component according to the present invention is not limited to the configuration for moving and adjusting the lens barrel 101 and the photodiode 109 as in the above-described embodiments.
It can be configured to be suitable for movement adjustment of various optical components such as various lenses, prisms, mirrors, and laser diodes.

[0040]

As described above, in the adjusting device for an optical component according to the present invention, the abutting portion made of a piezoelectric element and supported by the fixed portion has the abutting portion depending on the supplied voltage. The abutted optical component is pressed and moved.

Therefore, in this optical component adjusting apparatus, the amount of movement of the optical component can be controlled by adjusting the value of the voltage supplied to the abutting portion, regardless of the skill of the adjusting operator. ..

Further, in the optical component adjusting apparatus according to the present invention, the abutting member made of a piezoelectric element is abutted against the optical component and attached to the optical component to support and supply the inertial member. The optical components and the inertial member are moved in opposite directions according to the voltage. The optical component and the inertial member are moved by a distance inversely proportional to the ratio of their inertial mass.

Therefore, if the inertial mass of the inertial member is made sufficiently larger than the inertial mass of the optical component,
The optical component is moved substantially by a distance corresponding to the voltage supplied to the contact member. Then, when the voltage supply to the contact member is cut off after the movement of the optical component, the inertia member is moved so as to follow the optical component.

That is, the present invention can provide an adjusting device for an optical component, which is capable of easily adjusting the movement of an optical component with high precision and a small amount of movement.

[Brief description of drawings]

FIG. 1 is a first configuration of an optical component adjusting apparatus according to the present invention.
It is a side view which shows the example of.

FIG. 2 is a perspective view of essential parts showing a usage state of the adjusting device for an optical component shown in FIG.

FIG. 3 is a second configuration of an optical component adjusting apparatus according to the present invention.
It is a front view showing an example of.

FIG. 4 is a perspective view of a main part showing a configuration of an optical component in which the optical component adjusting device shown in FIG. 3 is used.

5 is a front view showing a usage state of the adjusting device for the optical component shown in FIG.

6 is a waveform diagram showing a voltage supplied to a contact member of the adjusting device for an optical component shown in FIG.

[Explanation of symbols]

 1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Abutting part 2 ・ ・ ・ ・ ・ ・ ・ ・ ・ Grip part 3 ・ ・ ・ ・ ・ ・ ・ ・ ・ Power supply cord 1a ・ ・ ・........ First contact member 1b ........ Second contact member 1c ........ Third contact member 1d ..・ ・ ・ ・ ・ ・ ・ ・ Fourth abutting member 5 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Frame 101 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Lens barrel 106 ・ ・ ・ ・ ・..... Photodiode support plate 109 .....

Claims (2)

[Claims] 1. An abutting portion made of a piezoelectric element, and a fixing portion for supporting the abutting portion, wherein the abutting portion is brought into contact with the abutting portion in accordance with a voltage supplied thereto. An optical component adjustment device that moves an optical component by pressing. 2. An abutting member made of a piezoelectric element, and an inertia member supported by the abutting member, wherein the abutting member is abutted against an optical component and attached to the optical component to provide the inertial force. An adjusting device for an optical component, which supports the member and moves the optical component and the inertia member in directions opposite to each other in accordance with a supplied voltage.