JP2020170144A5 - - Google Patents
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- JP2020170144A5 JP2020170144A5 JP2020011203A JP2020011203A JP2020170144A5 JP 2020170144 A5 JP2020170144 A5 JP 2020170144A5 JP 2020011203 A JP2020011203 A JP 2020011203A JP 2020011203 A JP2020011203 A JP 2020011203A JP 2020170144 A5 JP2020170144 A5 JP 2020170144A5
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Description
本発明の一側面としてのレンズ装置は、絞り手段と、前記絞り手段を駆動する駆動手段と、前記絞り手段を駆動するための駆動指示値を記憶する記憶手段と、前記駆動指示値に基づいて前記駆動手段を制御する制御手段とを有し、前記駆動指示値は、前記絞り手段の目標絞り値、および、前記絞り手段の駆動指示量に応じた値である。 A lens device as one aspect of the present invention includes aperture means, drive means for driving the aperture means, storage means for storing a drive instruction value for driving the aperture means, and a driving instruction value based on the drive instruction value. and control means for controlling the drive means, and the drive instruction value is a value corresponding to a target aperture value of the diaphragm means and a drive instruction amount of the diaphragm means .
また、図１（ａ）の横軸は、開放側から小絞り側への第１駆動方向における駆動指示値であり、縦軸のゼロラインは目標絞り値を示す。図１の例では、駆動指示値に対して駆動指示量を１、２、４、８、１２と変更させている。本実施形態の補正値ＱＮ１を適用する前の実絞り値のグラフ（図１（ａ））では、駆動指示量によって目標絞り値に対する実絞り値のばらつきが発生している。そして図１（ｂ）は、本実施形態の補正値ＱＮ１を適用して絞り機構２０４を駆動させた実絞り値のグラフで、目標絞り値に近い高精度な絞り機構を実現することができる。今回の例では、補正値ＱＮ１を適用する前時点で既に絞り精度が高いものを示したが、本実施形態の補正値ＱＮ１を用いれば、さらに絞り精度を改善することが可能である。また本実施形態では、説明を省略したが、この補正値ＱＮ１は駆動方向に応じて求めるため、小絞り側から開放側への第２駆動方向においても同様に適用可能である。 The horizontal axis of FIG. 1(a) is the driving instruction value in the first driving direction from the open side to the small aperture side, and the zero line on the vertical axis indicates the target aperture value. In the example of FIG. 1, the drive instruction amount is changed to 1, 2, 4, 8, and 12 with respect to the drive instruction value. In the graph of the actual aperture value before applying the correction value QN1 of the present embodiment (FIG. 1 (a)), the actual aperture value varies with the target aperture value depending on the drive instruction amount. FIG. 1B is a graph of the actual aperture value when the aperture mechanism 204 is driven by applying the correction value QN1 of this embodiment, and a highly accurate aperture mechanism close to the target aperture value can be realized. . In this example, the aperture accuracy is already high before applying the correction value QN1 , but the aperture accuracy can be further improved by using the correction value QN1 of this embodiment. Although not described in the present embodiment, the correction value QN1 is obtained according to the driving direction, so it is also applicable to the second driving direction from the small aperture side to the open side.
Claims (14)
前記絞り手段を駆動する駆動手段と、
前記絞り手段を駆動するための駆動指示値を記憶する記憶手段と、
前記駆動指示値に基づいて前記駆動手段を制御する制御手段と、を有し、
前記駆動指示値は、前記絞り手段の目標絞り値、および、前記絞り手段の駆動指示量に応じた値であることを特徴とするレンズ装置。 a squeezing means;
driving means for driving the aperture means;
storage means for storing a drive instruction value for driving the aperture means;
a control means for controlling the driving means based on the driving instruction value;
A lens device, wherein the drive instruction value is a value corresponding to a target aperture value of the diaphragm means and a drive instruction amount of the diaphragm means .
前記目標絞り値と実絞り値との差の絶対値が最大となる駆動指示量における複数の駆動指示値のうち、前記目標絞り値と前記実絞り値との差の絶対値が最小となる駆動指示値であることを特徴とする請求項１に記載のレンズ装置。 The driving instruction value is
Driving that minimizes the absolute value of the difference between the target aperture value and the actual aperture value among a plurality of drive instruction values in the drive instruction amount that maximizes the absolute value of the difference between the target aperture value and the actual aperture value. 2. The lens device according to claim 1, wherein the lens device is an indicated value.
前記駆動指示量ごとに、前記複数の駆動指示値に対して前記目標絞り値と前記実絞り値とを比較し、前記複数の駆動指示値のそれぞれに関して、前記目標絞り値と前記実絞り値との差の絶対値が最大となる駆動指示量を抽出することにより設定されていることを特徴とする請求項５または６に記載のレンズ装置。 The driving instruction value is
comparing the target aperture value and the actual aperture value with respect to the plurality of drive command values for each of the drive command amounts, and comparing the target aperture value and the actual aperture value with respect to each of the plurality of drive command values; 7. The lens device according to claim 5 or 6 , wherein the setting is made by extracting the driving instruction amount that maximizes the absolute value of the difference between the .
前記記憶手段は、前記駆動指示値として、前記第１駆動方向に前記絞り手段を駆動する際に用いられる第１駆動指示値、および、前記第２駆動方向に前記絞り手段を駆動する際に用いられる第２駆動指示値を記憶しており、
前記制御手段は、
前記目標絞り値が前記絞り手段の現在絞り値に対して前記第１駆動方向にある場合、前記第１駆動指示値に基づいて前記駆動手段を制御し、
前記目標絞り値が前記現在絞り値に対して前記第２駆動方向にある場合、前記第２駆動指示値に基づいて前記駆動手段を制御することを特徴とする請求項１乃至７のいずれか１項に記載のレンズ装置。 the aperture means is drivable in a first drive direction from the open side to the small aperture side and in a second drive direction from the small aperture side to the open side;
The storage means stores, as the drive instruction values, a first drive instruction value used when driving the diaphragm means in the first driving direction and a drive instruction value used when driving the diaphragm means in the second driving direction. and stores the second drive instruction value to be
The control means is
controlling the drive means based on the first drive instruction value when the target aperture value is in the first drive direction with respect to the current aperture value of the aperture means ;
8. The drive means is controlled based on the second drive instruction value when the target aperture value is in the second drive direction with respect to the current aperture value. A lens device according to the paragraph.
前記レンズ装置を介して形成される光学像を光電変換する撮像素子と、
前記撮像素子を保持するカメラ本体と、を有することを特徴とする撮像装置。 a lens device according to any one of claims 1 to 13 ;
an imaging device that photoelectrically converts an optical image formed through the lens device;
and a camera body that holds the imaging element.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16/823,651 US11513422B2 (en) | 2019-04-04 | 2020-03-19 | Lens apparatus and image pickup apparatus |
| US17/980,598 US11953819B2 (en) | 2019-04-04 | 2022-11-04 | Lens apparatus and image pickup apparatus |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019071998 | 2019-04-04 | ||
| JP2019071998 | 2019-04-04 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2020170144A JP2020170144A (en) | 2020-10-15 |
| JP2020170144A5 true JP2020170144A5 (en) | 2023-01-31 |
| JP7475872B2 JP7475872B2 (en) | 2024-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2020011203A Active JP7475872B2 (en) | 2019-04-04 | 2020-01-27 | Lens device and imaging device having the same |
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| JP (1) | JP7475872B2 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009063702A (en) | 2007-09-05 | 2009-03-26 | Sony Corp | Imaging apparatus, its motor control method and motor control program |
| JP2012013896A (en) | 2010-06-30 | 2012-01-19 | Canon Inc | Optical instrument |
| JP5979884B2 (en) | 2012-01-17 | 2016-08-31 | キヤノン株式会社 | Camera system and lens apparatus |
| JP5984489B2 (en) | 2012-04-27 | 2016-09-06 | キヤノン株式会社 | Lens apparatus and imaging apparatus having the same |
| JP5709806B2 (en) | 2012-07-10 | 2015-04-30 | キヤノン株式会社 | Lens unit and imaging device |
| JP6700756B2 (en) | 2015-12-03 | 2020-05-27 | キヤノン株式会社 | Lens device and imaging device |
| JP6739979B2 (en) | 2016-04-21 | 2020-08-12 | オリンパス株式会社 | Optical device and aperture control method |
| JP2019200325A (en) | 2018-05-17 | 2019-11-21 | キヤノン株式会社 | Lens device and imaging apparatus having the same |
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2020
- 2020-01-27 JP JP2020011203A patent/JP7475872B2/en active Active
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