JP2022023232A5

JP2022023232A5 -

Info

Publication number: JP2022023232A5
Application number: JP2021186139A
Authority: JP
Filing date: 2021-11-16
Publication date: 2022-10-28
Anticipated expiration: 2039-10-18

Description

本発明の一側面としての光学機器は、光軸方向に移動可能な第１の可動部材と、光学素子を保持し、第１の可動部材に対して光軸方向に移動可能な保持部材と、第１の可動部材により保持され、保持部材を光軸方向にガイドするガイド部材と、第１の可動部材とは独立に光軸方向に移動可能な第２の可動部材と、保持部材を光軸方向に駆動する駆動手段と、保持部材の位置を検出する検出手段を有する。駆動手段は、第２の可動部材に保持され、ズーミングにおいて第２の可動部材が光軸方向に移動することにより、駆動手段の光軸方向での位置が変化することを特徴とする。 An optical instrument as one aspect of the present invention includes a first movable member that is movable in an optical axis direction, a holding member that holds an optical element and is movable in the optical axis direction with respect to the first movable member, a guide member held by a first movable member and guiding the holding member in the optical axis direction; a second movable member capable of moving in the optical axis direction independently of the first movable member; It has driving means for driving in the direction and detection means for detecting the position of the holding member . The drive means is held by the second movable member, and the position of the drive means in the optical axis direction is changed by moving the second movable member in the optical axis direction during zooming.

Claims

a first movable member movable in the optical axis direction;
a holding member that holds an optical element and is movable in the optical axis direction with respect to the first movable member;
a guide member held by the first movable member and guiding the holding member in the optical axis direction;
a second movable member movable in the optical axis direction independently of the first movable member;
driving means for driving the holding member in the optical axis direction ;
Having a detection means for detecting the position of the holding member ,
the driving means is held by the second movable member;
An optical instrument according to claim 1, wherein , during zooming, the second movable member moves in the optical axis direction, thereby changing the position of the driving means in the optical axis direction.

2. An optical apparatus according to claim 1, wherein displacement of said driving means in directions other than said optical axis direction is restricted by said first movable member.

A maximum value A of the movement amount of the holding member relative to the first movable member and a maximum value B of the movement amount of the holding member relative to the second movable member are
A>B
3. The optical instrument according to claim 1, wherein the following condition is satisfied.

The maximum absolute value VC of the driving speed of the holding member driven by the driving means with respect to the first movable member and the maximum absolute value VD of the driving speed with respect to the second movable member are
VC>VD
4. The optical instrument according to any one of claims 1 to 3, wherein the following condition is satisfied.

position detection means for detecting a position of the holding member in the optical axis direction with respect to the first movable member;
5. The optical apparatus according to claim 1 , wherein the position detection means is provided on at least one of the first movable member and the holding member.

When the first movable member and the second movable member move in the optical axis direction during zooming, the driving means drives the holding member in the optical axis direction for focusing. 6. An optical instrument according to any one of claims 1-5 .

The first movable member and the second movable member draw the same trajectory during zooming as the first optical element and the second optical element, which are different from the optical element held by the holding member , respectively. 7. The optical device according to claim 6 , wherein the optical device moves in the direction of the optical axis.

3. The first optical element and the second optical element are arranged adjacent to each other in the optical axis direction or sandwiching the optical element held by the holding member. 8. The optical instrument according to 7 .

A control means for controlling driving of the driving means using data obtained based on a difference between a movement amount of the first movable member and a movement amount of the second movable member during zooming. The optical instrument according to any one of claims 6 to 8 .

a driving transmission member that engages with the output portion of the driving means and transmits the driving force of the driving means to the holding member;
biasing means for biasing the drive transmission member toward the output portion of the driving means;
2. The biasing force of said biasing means biases said driving means and said second movable member against said first movable member in a direction orthogonal to said optical axis direction. 10. The optical instrument according to any one of 9 .

each of the first movable member and the second movable member or the fixed portion of the driving means,
a guide portion that engages with each other to guide the second movable member in the optical axis direction;
anti-floating portions that engage with each other to prevent the second movable member from floating with respect to the first movable member in a direction orthogonal to the optical axis direction;
11. The optical apparatus according to claim 10 , further comprising a contact portion formed as a slope not parallel to the anti-floating portion in a plane orthogonal to the optical axis direction and contacting each other.

The anti-floating portion and the contact portion are provided in at least three places in total,
When a triangle formed by connecting the three points with a straight line is viewed from a direction orthogonal to the optical axis direction, there is a position where the drive transmission member engages with the output portion of the driving means inside the triangle. 12. An optical instrument according to claim 11 .

11. A position where the drive transmission member engages with the output portion of the driving means when viewed from the optical axis direction is between the anti-floating portion and the contact portion. 13. Or the optical instrument according to 12 .

14. The abutting portion according to any one of claims 11 to 13 , wherein the contact portion generates an urging force from the urging force of the urging means in a direction in which the guide portions are engaged with each other. optics.

15. The optical apparatus according to any one of claims 11 to 14 , wherein the guide portion is located between the anti-floating portion and the contact portion when viewed from the optical axis direction.

16. The optical device according to any one of claims 1 to 15 , wherein the optical device is attachable to and detachable from an imaging device.

16. The optical instrument according to any one of claims 1 to 15 , further comprising an imaging element that receives light from the optical element.