JP3392218B2 - Optical system support device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention
Used for optical information recording and / or reproducing device of information recording medium
Objective lens that projects a light spot on the information recording medium surface
Optical system supporting devices that support optical elements such as
It is. [0002] In optical information recording and / or reproducing apparatus,
Are optical elements that follow the deflection and inclination of the information recording medium surface.
That is, it is necessary to drive the optical system support device up and down. did
Therefore, the conventional optical system supporting device holds the optical element.
The holding member is supported by multiple support members such as wire springs.
Displaceably supported, focus direction using electromagnetic coil
And drive control in the tracking direction. However
In such a drive system, the optical system
Stable because the element is driven to form a secondary vibration system
For efficient drive control effectively suppresses first-order or higher resonance
There is a need to. An optical system for suppressing resonance generated in a support member
Many support devices have been proposed. For example, JP-A-58-1
FIG. 15 shows an optical system supporting device described in No. 82142.
So that the objective lens 1 is supported in the tracking direction.
As members, two metal springs 2a, 2b and 3a, 3b
Silicon resin layers 4a and 4b and viscous rubber layer 5
Want to use leaf springs 6a and 6b with a and 5b interposed
The optics support system is shared by the so-called constrained damping.
The vibration is suppressed. [0004] Further, the light disclosed in JP-A-59-124042 is disclosed.
As shown in FIG. 16, one leaf spring 1
1a is formed to be longer than the other leaf spring 11b,
This reduces the resonance peak amount by shifting the resonance frequency.
Comb. Also, an optical system disclosed in Japanese Patent Application Laid-Open No. 5-46999 is disclosed.
In the system supporting device, as shown in FIG.
The effective length of the upper two lines and the lower two lines of b, c and d are equal
The fixed position of these one ends is made different so that
The objective lens 22 is connected by these wires 21a, b, c and d.
(In the figure, a holding member 23) is held.
Ears 21a and 21b are behind wires 21c and 21d
Side). Also, an optical system disclosed in Japanese Patent Application Laid-Open No.
In the system supporting device, as shown in FIG.
Between the lens holder 31 and the wire 33
Between the base 32 and the wire 33
Filling and holding the gel-like damping material 34 in places
Damping. [0007] However, FIG.
The optical system support device is a so-called restraint type damping,
No further effect can be obtained. In the optical system supporting apparatus shown in FIG.
The mutual relationship between the two leaf springs is not considered.
No. The optical system supporting device shown in FIG.
No consideration has been given to logging. In the optical system supporting device shown in FIG.
Rubber such as silicone rubber and butyl rubber is hardened by vulcanization, etc.
Since the damping material is used in the
The shape can be freely changed by using FIG.
Using a gel-like damping material like the optical system support device
If necessary, a member that fills and holds these damping materials
Is required, and the whole apparatus becomes large and complicated. It is an object of the present invention to make the optical system supporting device large-sized.
By improving the damping effect without complicating
is there. [0012] An optical system supporting apparatus according to the present invention.
Has a holding member for holding the optical element,
At least supported on a fixed member so that it can move in the optical axis direction
Made of elastic members and arranged parallel to each other
The holding member includes a first plate member and a second plate member.
And an optical system supporting device connecting the fixing member,
The first and second plate members have substantially the same length.
Size and shifted from each other by a predetermined distance in the extending direction
The first plate-shaped member and the second plate-shaped member.
Gel-like or
Is characterized in that a liquid damping material is arranged.
You. According to the first optical system of the present invention, the first plate-shaped portion is provided.
The material and the second plate-like member have substantially the same length dimension, and
Are arranged at a predetermined distance from each other in the extending direction.
Between the first plate-shaped member and the second plate-shaped member.
Gel or liquid damping material is arranged to connect the materials.
Is placed. Therefore, the optical element is displaced in the optical axis direction.
Then, between the first plate member and the second plate member in the optical axis direction.
The gap greatly changes, reducing the damping effect of the optical system support device.
improves. In addition, the first plate member and the second plate member
A gel or liquid dam is connected between the two plate-shaped members.
Since the ping material is arranged, the damping material is filled and stored.
No components are required, making the entire device large and complex.
The damping is performed effectively without being performed. An embodiment of the optical system supporting apparatus according to the present invention will be described with reference to the accompanying drawings.
This will be described in detail with reference to FIG. In addition, in the drawing
Direction is the y direction, tangential direction is the x direction,
The focus direction is the z direction. However, in the second embodiment,
Racking direction x direction, tangential direction y direction
The direction and the focus direction are the z direction. FIG. 1 shows the light of the present invention.
FIG. 2 is a perspective view of a first embodiment of a scientific system support device, and FIG.
1 is a cross-sectional view of a first embodiment of the optical system supporting device according to the present invention. this
The optical system support device moves the objective lens 41 only in the focus direction.
And the objective lens 41 is fixed at the center.
One end of the holding member 42 is fixed to the holding member 42.
Holding member 42 so as to be movable in the z direction.
And two leaf springs 43a and 43b for supporting
The other ends of the leaf springs 43a and 43b are fixed respectively.
And a fixing member 44. An air-core-shaped side surface is
The focus coils 45a and 45b are fixed. Objective
A reflection mirror 46 is arranged immediately below the lens 41,
Magnets face the focus coils 45a and 45b.
G 47a and 47b are arranged. This magnet 47a
And 47b are arranged so that the magnetic poles face each other on two sides in the z direction.
It consists of two magnetized surfaces of two magnets. Also,
Focus coils 4 of these magnets 47a and 47b
The yokes 48a and 4a are provided on the side opposite to the sides 5a and 45b.
8b are respectively fixed. The two leaf springs 43a and 43b are the same member.
Use Further, the two leaf springs 43a and 43b
Extends in the racking direction. Leaf springs 43a and 43b
A stainless steel, beryllium copper or other metal rectangular shape
One end to the holding member 42 and the other end to the fixing member 44
Each is insert molded. Leaf springs 43a and 43b
Denotes a recording / reproducing disc having an optical system supporting device (shown in FIG.
(Not shown), and the fixing member 44
It faces the center of the recording / playback disc. Fixing member 44
And the reflection mirror 46 and the yokes 48a and 48b.
Each is fixed to the carriage 49. The leaf spring 43a is moved in the y direction with respect to the leaf spring 43b.
Holding member 42 and fixing member 44
Fixed to. In this example, the deviation δ is about 0.5 mm to 3 mm.
And The fixed end of the leaf spring 43b on the holding member 42 side is
So that it exists at a position where it enters the lower side of the lens 41.
You. The leaf springs 43a and 43b are configured to hold the holding member 42 and the fixing member.
Effective length l existing effectively between _a And l _b Equal
Make In this example, the effective length is l _a And l _b 10m each
m. Between the leaf spring 43a and the leaf spring 43b
The gap d is held by the damping material 50 by surface tension or the like.
Narrow so that the interval is In this example, the interval d is set to 0.
It is about 3 mm to 2 mm. A hole 51 is formed in the leaf spring 43a.
The damping material 50 is dispensed from this hole 51 with a dispenser.
To be injected between the leaf spring 43a and the leaf spring 43b.
You. In this example, the damping material 50 is made of a UV-cured silicon gel.
And a damping pin is provided on the entire surface between the leaf springs 43a and 43b.
The lubricating material 50 is brought into contact. Illuminates UV light from x direction
The injected and injected damping material 50 is cured. UV
Irradiating light from the x direction means that there is no obstruction between them.
This is advantageous. When using the above recording / reproducing disc, the semiconductor
Laser light emitted from a body laser (not shown)
−46, is reflected by the reflecting surface 52 and passes through the objective lens 41.
Irradiated on an optical disc (not shown). This reflected light
The light passes through the reflecting surface 52 via the objective lens 41 and is
(Not shown). The operation of this embodiment will be described. Fig. 3 (a) shows the conventional
It is a diagram for explaining the operation of the optical system support device,
(B) shows the operation of the first embodiment of the optical system supporting apparatus of the present invention.
It is a figure for explanation, (c) is a board of an optical system support device.
FIG. 4 is a diagram illustrating a vibration mode of a primary transverse vibration of a spring;
(D) is the vibration of the secondary transverse vibration of the leaf spring of the optical system supporting device.
It is a figure showing a mode. 3 (a) and 3 (b)
9 shows the primary transverse vibration mode of the leaf spring. As shown in FIG. 3A, in the y direction
A conventional optical system supporting device in which the end positions of the leaf springs are the same.
Then, when the holding member 44 moves in the positive z direction, the leaf spring 4
3a and 43b are also deformed accordingly.
a between the a and the leaf spring 43b, ie, parallel to the z direction.
The spacing between the opposing parts in the direction does not change. Accordingly
Distance between leaf spring 43a and leaf spring 43b at this time
d 'is equal to the distance d of the optical system supporting device at rest. As shown in FIG. 3B, in the y direction
The position of the end of the leaf spring is different from that of the optical system support device of the present invention.
In the first embodiment, the holding member 44 moves in the positive z direction.
And the leaf springs 43a and 43b are also deformed accordingly.
The distance between the spring 43a and the leaf spring 43b changes. did
In this case, the distance between the leaf spring 43a and the leaf spring 43b is set.
The distance d 'is larger than the distance d when the optical system support device is at rest.
(D '> d). The holding member 44 moves in the negative z direction.
When it moves, d '<d. Therefore, dumping
The amount of deformation of the material 50 is larger than that of the conventional optical system supporting device.
And the damping effect is further improved. Next, the objective lens 41 (FIG. 1) is moved in the z direction.
When moved, that is, the leaf springs 43a and 43b (FIG. 1)
The vibration mode of the primary transverse vibration of FIG.
explain. As shown in FIG. 3C, the inside of the leaf spring 43a
At the center, the amplitude differs by Δd in the portion shifted by δ in the y direction.
Since the leaf springs 43a and 43b are shifted by δ in the x direction,
Is parallel to the z direction of the leaf springs 43a and 43b.
It becomes the amplitude difference of the part which opposes in the direction. Therefore,
The damping material 50 (see FIGS. 1 and
The deformation amount in FIG. 2) increases by this amplitude difference Δd,
The pumping effect is further improved. The secondary transverse vibration mode of the leaf springs 43a and 43b
The mode will be described. In this case, as shown in FIG.
In addition, the phase of the vibration is opposite at both ends of the vibration indicated by δ.
That is, the phase of the portion facing in the direction parallel to the z direction is
Some parts are opposite to each other. Therefore, two leaf springs
Parts facing each other in a direction parallel to the z direction of 43a and 43b
Due to the difference in amplitude or phase of vibration at
The amount of deformation of the existing damping material 50 (FIGS. 1 and 2)
Larger than conventional optical system support equipment, damping
The effect is further improved. 3 (c) and 3 (d), the z-axis
Only the primary and secondary vibration modes of transverse vibration are explained
As described above, the third and higher vibration modes of the transverse vibration and the y-direction
In other words, the vibration mode of longitudinal vibration
As the amplitude and / or phase of the vibration is shifted, the damping
The effect is further improved. Also, twist around x-axis and y-axis
The same applies to the vibration of. According to this embodiment, the holding member moves in the z direction.
The amplitude of the vibration of the portion where the two leaf springs
And / or a dampin interposed between them due to phase shift
When the amplitude and / or phase are the same,
The damping effect of the optical system support device
improves. Also, fill the damping material between the two leaf springs.
Is filled, so that the damping material is
No need to hold parts, making the whole device large and complex
Damping can be performed effectively without causing In addition,
When the distance between the springs is small, fill each leaf spring
It is difficult to provide a part, but as in this example,
When filling the damping material, hold the damping material
It is suitable because it is pan. Injection of damping material into leaf spring
Holes are formed so that even when the distance between the leaf springs is narrow,
The damping material can be easily injected between the leaf springs. In this embodiment, damping pins are provided on the entire surface between the leaf springs.
As the lubricating material comes in contact, the damping effect
Better. Also, the same member leaf spring can be used.
To reduce the manufacturing cost, and butyl between metal springs
Two more three-layer springs with rubber etc. interposed in parallel
Compared to a device that supports parallel springs using side by side
The number of springs is small, further reducing manufacturing costs.
Can be Also, place the lower leaf spring below the objective lens.
So that it can be
The leaf spring extends even if the springs are displaced from each other in the extension direction.
The size of the device in the direction is not increased. In this embodiment, two sheets of damping material are used.
That are held between leaf springs and have a damping effect
For example, heat-cured silicone gel, UV-cured
Kuril gel, silicon oil compara with silica powder
Silicone oil such as oil, rubber such as grease and butyl
Use a system adhesive or the like. In addition, vulcanized and cured butyl rubber and
Silicon rubber or the like can also be used. This is
The same applies to the embodiment. Also, the effective length and thickness of the two leaf springs are changed.
Damping by changing the resonance frequency
The effect can be further improved. In this embodiment, the material of the leaf spring is metal.
But plastic films such as polyimide, plastic
It is also possible to use a support spring or the like that is formed by a lock. Also,
Etching the surface of the leaf spring in contact with the damping material
Surface treatment increases the holding force of the damping material
The damping effect is also improved. In this embodiment, the damper is inserted through the hole formed in the leaf spring.
Damping material was injected between the leaf springs.
You may enter. FIG. 4 shows a second embodiment of the optical system supporting apparatus of the present invention.
FIG. 5 is a perspective view of an example, and FIG.
It is a top view of 2 Example. This optical system support device is
Lens 61 in the focus and tracking directions
The objective lens 61 is driven, and the holding portion is fixed at the center.
The material 62 and one end thereof are fixed to the holding member 62, respectively.
Holding member 6 so as to be movable in the x and z directions.
And two leaf springs 63a, 63b, 63c supporting
63d and these four leaf springs 63a, 63b, 63c.
And a fixing member 64 to which the other ends of 63d are fixed.
Equipped. An air-core-shaped flange is provided on the side of the holding member 62 in the x direction.
The focus coils 65a and 65b are empty on the side surface in the y direction.
Core tracking coils 65c and 65d
Stick. In this example, the tracking coils 65c and 6c
One side 66a and 66b parallel to the z-axis of 5d are magnetized
It arrange | positions with respect to the magnetic pole surface edge of 67a and 67b upper side.
The tracking coils 65c and 65d are
The tracking coils 65c and 6
The driving center generated in 5d is the objective lens 61, the holding member
62, focus coils 65a and 65b and track
One with the center of gravity of the movable part including the king coils 65c and 65d.
I'm trying to match. Also, this magnet 67a and
And 67b opposite to the focus coils 65a and 65b side
The yokes 68a and 68b are fixed to the side
You. In this embodiment, the leaf springs 63a and 63c
With respect to the leaf springs 63b and 63d in the y direction.
It is fixed to the holding member 62 and the fixing member 64. Other configurations are
This is almost the same as the first embodiment. The operation of this embodiment will be described. Magnet 67a
Some of the magnetic flux generated from the pole face of the
Of the yoke 68a passing through one side 66a of the
Head portion 69a, and the bent portion of the yoke 68b
A part of the magnetic flux generated from 69b is a tracking coil.
Magnetic pole of magnet 67b passing through one side 66b of 65d
Head to the surface. For this reason, the sides 66a and 66b have y
A magnetic field is generated in the direction. Tracking coil 65c and
When a current is passed through 65d, a force is generated in the x direction,
62 is also driven in the x direction. Other operations are the same as in the first embodiment.
The same is true. According to the present embodiment, the support drive in the tracking direction
The optical system support device of the present invention is also applicable to a moving optical system support device.
Position can be applied. FIG. 6 is a plan view showing a first embodiment of the optical system supporting device.
FIG. 7 is a perspective view showing a first part of the optical system supporting device.
It is sectional drawing of the example. In this example, the leaf springs 71a and 71b
The elliptical openings 72a, 73a and 72b, 73b
Are formed near these fixed ends. Opening 72a
And 73b are compared to the openings 73a and 72b.
a and 71b are located near the center. Leaf spring 71a and
71b has the same shape, and one leaf spring is reversed in the x direction.
From the end of the leaf spring 71a on the holding member 74 side.
The distance to the center of the opening 72a is determined by the fixing member of the leaf spring 71b.
Equal to the distance from the end on the 75 side to the center of the opening 73b
And open from the end of the leaf spring 71a on the fixing member 75 side.
The distance to the center of the opening 73a is determined by the holding member 7 of the leaf spring 71b.
Equal to the distance from the end on the 4th side to the center of the opening 72b
You. Damping material between the leaf spring 71a and the leaf spring 71b
76 from the fixed end on the holding member 74 side
, The distance from the fixed end on the holding member 74 side to the opening 7
2b distance from the center, open from the fixed end on the fixed member 75 side
Distance to the center of the opening 73a, whether it is the fixed end on the fixed member 75 side
Distance from the center of the opening 73b to l ₁ , L _Two ,
l _Two , L ₁ (L ₁ > L _Two ). The operation of this embodiment will be described. FIG.
FIG. 7 is a view for explaining the operation of the third embodiment of the optical system supporting device.
It is. Openings 72a, 73a are formed in leaf springs 71a and 71b.
And 72b, 73b, the rigidity of this portion is low.
When the objective lens 77 is moved in the z direction,
Is easily bent. Therefore, as shown in FIG.
The distance d ″ between the leaf spring 71a and the leaf spring 71b is
When the lens 77 is driven in the positive z direction,
In the vibration mode of the primary transverse vibration of the springs 71a and 71b, static
It is larger than the stop distance d, and is driven in the negative z direction.
When the distance is set to be stationary, the distance d is smaller than the interval d at rest. sand
That is, at the time of driving, between the leaf spring 71a and the leaf spring 71b,
An interval change occurs in the middle part. Thus, the leaf spring 71a
By changing the stiffness of a part of the two plates 71b and 71b
Vibration of the part of the spring 71a and 71b which is close and opposed
Can be shifted in width and / or phase and are present in the middle
The amount of deformation of the damping material 76 is
The damping effect is further improved. other
Is almost the same as in the first embodiment. According to the present embodiment, similarly to the first embodiment, the holding section
When the material moves in the z direction, that is, when the leaf spring vibrates in the z direction,
The amplitude and / or phase of the vibration of the two leaf springs
Therefore, the amount of deformation of the damping material filled during this
And / or larger than when the phases are the same,
Improve the damping effect of the optical system support device. Also this example
However, as in the first embodiment, the entire apparatus is made large and complicated.
Damping can be performed effectively without the need. In this embodiment, the opening is elliptical.
For example, as shown in FIG. 9, rectangular openings 78a and 78b
Can also be used. In this embodiment, two leaf springs having the same shape are used.
And the leaf springs are shifted from each other as in the first embodiment.
It is no longer necessary to perform insert molding.
Since the shape of the fixed member is simplified, manufacturing costs can be reduced.
Can be Also, the leaf springs are connected to each other as in the first embodiment.
Freer design than insert molding with offset
As the degree increases, the amplitude and / or phase of the vibration
Can be larger. In this embodiment, an opening is formed in a part of the leaf spring.
The rigidity of a part of the leaf spring is changed by
May be made thinner to reduce rigidity,
Even if rigidity is increased by providing a partial streak-like plastic deformation part
Good. That is, in the direction parallel to the z-direction of the two leaf springs
So that the rigidity of the opposing part changes in the extension direction of the leaf spring
do it. FIG. 10 shows a plate according to a second embodiment of the optical system supporting apparatus.
FIG. 11 is a perspective view of a spring portion, and FIG.
It is sectional drawing of 2 reference examples. In this example, the leaf spring 81a and
A little toward the end from the center of 81b, leaf spring 81a and
Folded portion bent in the direction perpendicular to the extending direction of 81b
82a and 82b are formed respectively. Also, leaf spring 8
1a and 81b have the same shape. Bends 82a and
Between the leaf spring 81a and the leaf spring 81b.
Opposed at a constant interval, between the leaf spring 81a and the leaf spring 81b.
Is filled with a damping material 83. Another configuration is the first embodiment.
It is almost the same as In this embodiment, y of the bent portions 82a and 82b
Direction, the holding member 84 is moved in the z direction.
Movement, that is, when the leaf spring vibrates in the z direction,
The stiffness changes around 82a and 82b, thus bending
Amplitude and / or position of the vibrations at the barbs 82a and 82b
Out of phase. Therefore, not only the lateral vibration in the z direction but also the y
The amplitude and / or phase of the longitudinal vibrations
Swell. For this purpose, the bent portion 82a and the bent portion
82b is compressed and caught.
Tension deformation, improving the damping effect against longitudinal vibration
You. Therefore, in this example, the damper in the extending direction of the support member is
Suitable for pumping. In this example, two plate bars are used.
Regardless of the gap between the screws, set the gap between the
Can be specified. Other operations and effects are the first
This is almost the same as the third embodiment. FIG. 12 shows a plate according to a third embodiment of the optical system supporting apparatus.
FIG. 13 is a perspective view of a spring portion, and FIG.
It is sectional drawing of 3 reference examples. In this example, the leaf spring 91a and
A little toward the center from the end of 91b, leaf springs 91a and 91
Folded part 9 bent at an angle to the extending direction of 1b
2a, 93a and 92b, 93b are formed respectively.
The leaf springs 91a and 91b have the same shape. Folding
Spacing and bending between bent portion 92a and bent portion 93a
Narrowing the space between the bent portion 92b and the bent portion 93b,
The damping materials 94a and 94b are respectively placed between them.
Fill. Other configurations are similar to those of the first embodiment and the first and second embodiments.
It is almost the same as the reference example. In this example, the bent portions 92a, 93a and 9
2b and 93b have different bending positions in the y direction.
In order to move the holding member 95 in the z direction,
When vibrating in the direction, the bent portions 92a, 93a and 9
The stiffness at 2b, 93b changes and therefore bends
Of the vibration in the portions 92a, 93a and 92b, 93b.
The width and / or phase are shifted. Therefore, the horizontal vibration in the z direction
Amplitude and / or longitudinal vibration in the x direction as well as motion
The phase becomes different, and the bent portion 92a and the bent portion
Between bent portion 92b and between bent portion 93a and bent portion 9
3b, the damping members 94a and 94b are deformed,
Improved damping effect for not only lateral vibration but also longitudinal vibration
I do. In this example, when the distance between the leaf springs is large,
In any case, the interval between the bent parts can be set freely.
And therefore low viscosity silicon as a damping material
The holding member can be held even when oil is used.
Such a small interval can be used. Also reverse bent part
To increase the gap between them and fill with more damping material
Therefore, it is possible to adjust the amount of damping material by using two plates.
This can be done regardless of the spacing between the springs. More books
In the example, the amount of the damping material is smaller than in the above-described embodiment.
Can be done. For other actions and effects,
This is almost the same as the first, third and fourth embodiments. FIG. 14 shows the fourth embodiment of the optical system supporting apparatus according to the present invention.
It is sectional drawing of the example. In this example, the damping material
By using rubber 101, plates are provided at different positions in the extending direction.
The springs 100a and 100b are connected. In this example, a leaf spring
At different positions in the extension direction of the
By connecting at parts where the width and / or phase are shifted
So that the amplitude and / or phase of the vibration of the leaf spring
And the damping effect is improved. Other configurations and operations
Is almost the same as the first embodiment and the first, second and third reference examples.
It is. The present invention is limited to the embodiment described above.
Rather, many modifications and variations are possible. For example,
Instead of an objective lens as an optical element, another laser or hologram
Gram elements, prisms, mirrors, etc. can be used
You. In the optical system supporting device of the present invention, the optical element is
At least one of focus direction, tracking direction, etc.
Light that can be driven by a support member such as a leaf spring
It can be applied to academic support devices. In addition, support
Two or more materials can be used. The optical system of the present invention has a damping effect.
There is an advantage that can be improved. [0063]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a first embodiment of an optical system supporting device according to the present invention. FIG. 2 is a sectional view of a first embodiment of the optical system supporting apparatus of the present invention. FIG. 3A is a diagram for explaining a vibration mode of a primary transverse vibration of a leaf spring of a conventional optical system support device,
(B) is a diagram for explaining a primary transverse vibration mode of the leaf spring of the first embodiment of the optical system supporting device of the present invention, and (c) is a diagram illustrating one of the leaf springs of the optical system supporting device. It is a figure which shows the vibration mode of the next transverse vibration, and (d) is a figure which shows the vibration mode of the secondary transverse vibration of the leaf spring of an optical system support apparatus. FIG. 4 is a perspective view of a second embodiment of the optical system supporting device of the present invention. FIG. 5 is a top view of a second embodiment of the optical system supporting device of the present invention. FIG. 6 is a perspective view of a leaf spring of a first reference example of the optical system supporting device. FIG. 7 is a sectional view of a first reference example of the optical system supporting device. FIG. 8 is a diagram for explaining an operation of the first reference example of the optical system supporting device. FIG. 9 is a perspective view of a leaf spring used in a modification of the first reference example. FIG. 10 is a perspective view of a leaf spring portion of a second reference example of the optical system supporting device. FIG. 11 is a sectional view of a second reference example of the optical system support device. FIG. 12 is a perspective view of a leaf spring portion of a third reference example of the optical system support device. FIG. 13 is a sectional view of a third reference example of the optical system support device. FIG. 14 is a sectional view of a fourth reference example of the optical system support device. FIG. 15 is a sectional view of a first conventional optical system support device. FIG. 16 is a sectional view of a second conventional optical system support device. FIG. 17 is a side view of a third conventional optical system support device. FIG. 18 is a perspective view of a fourth conventional optical system support device.

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Claims (1)

(57) Claims 1. In order to support a holding member for holding an optical element on a fixed member so as to be movable at least in the optical axis direction of the optical element, the holding member is made of an elastic member and mutually In an optical system supporting device in which the holding member and the fixed member are connected by a first plate member and a second plate member arranged in parallel, the first plate member and the second plate member The members have substantially the same length and are arranged in a state of being shifted from each other by a predetermined distance in the extending direction, and both plate-like members are provided between the first plate-like member and the second plate-like member. An optical system supporting device, wherein a gel or liquid damping material is arranged so as to connect members.