Lens device, imaging device, and imaging system

Abstract

To provide a lens device capable of properly performing processing when using optical components that modify aberrations. [Solution] The lens device is a lens device that can be attached to an imaging device equipped with an image sensor, and is characterized by comprising an aperture diaphragm, a first optical member for changing aberrations, and control means for performing processing related to the aperture diaphragm according to a first aperture value that defines the movable range of the aperture diaphragm, which is determined based on the effect provided by the first optical member, and a second aperture value of the aperture diaphragm instructed by the imaging device.

Claims

1. A lens device that can be attached to an imaging device equipped with an image sensor, Aperture diaphragm and A first optical element for changing aberrations, A lens device characterized by having a first aperture value that defines the movable range of the aperture diaphragm, determined based on the effect provided by the first optical member, and a control means that performs processing related to the aperture diaphragm according to a second aperture value of the aperture diaphragm instructed by the imaging device.

2. The lens device according to claim 1, characterized in that the control means sets the aperture value of the aperture diaphragm to the second aperture value when the second aperture value is smaller than the first aperture value, and sets the aperture value of the aperture diaphragm to the first aperture value when the second aperture value is larger than the first aperture value.

3. The lens device according to claim 1 or 2, characterized in that the control means transmits information regarding the first aperture value to an external device when the second aperture value is greater than the first aperture value.

4. The lens device according to claim 3, characterized in that the external device is at least one of the imaging device and the lens device, which is an operating device for operating the imaging device and the lens device.

5. The lens device according to claim 1 or 2, characterized in that the control means notifies information regarding exposure adjustment to make the exposure amount of the image sensor at the first timing equal to the exposure amount at the second timing which precedes the first timing, if the second aperture value at the first timing is greater than the first aperture value.

6. The lens device according to claim 5, characterized in that the information relating to exposure adjustment is at least one of the following: information relating to the aperture diaphragm of the imaging device, information relating to the variable ND filter of the imaging device, information relating to the image gain, and information relating to the shutter speed.

7. It further includes a variable ND filter, The lens apparatus according to claim 1 or 2, characterized in that the control means calculates and sets information regarding the variable ND filter to make the exposure amount of the image sensor at the first timing equal to the exposure amount at the second timing which precedes the first timing, if the second aperture value at the first timing is greater than the first aperture value.

8. A driven means comprising a plurality of optical members including the first optical member, The system further includes a driving means for driving the driven means so that each of the plurality of optical members is inserted into and removed from the optical path, The lens device according to claim 1 or 2, characterized in that the control means performs the processing according to the first and second aperture values ​​when the first optical member is inserted into the optical path.

9. The lens device according to claim 8, characterized in that the plurality of optical members include a second optical member for changing the magnification.

10. The lens device according to claim 1 or 2, characterized in that the control means acquires information regarding the effect provided by the first optical element, which is selected by the user, and sets the second aperture value according to the information.

11. The lens apparatus according to claim 1 or 2, characterized in that the aberration includes at least one of spherical aberration and chromatic aberration.

12. An imaging device to which a lens device comprising an aperture diaphragm and a first optical element for changing aberrations can be attached, Image sensor and An acquisition means for acquiring a first aperture value that defines the movable range of the aperture diaphragm, which is determined based on the effect provided by the first optical element, The image sensor has a control means for adjusting the exposure amount, The imaging apparatus is characterized in that, when the acquisition means acquires the first aperture value, the control means sets the aperture value of the aperture diaphragm to the first aperture value and switches the exposure adjustment method from the first method to the second method.

13. The lens device comprises a driven means having a plurality of optical members including the first optical member, and a driving means for driving the driven means so that each of the plurality of optical members is inserted into and removed from the optical path. The imaging apparatus according to claim 12, characterized in that when the first optical member is inserted into the optical path, the acquisition means acquires information indicating that the first optical member has been inserted into the optical path.

14. The first method is a method that uses the aperture diaphragm provided by the imaging device, The imaging apparatus according to claim 12 or 13, characterized in that the second method is a method using at least one of the variable ND filter, image gain, and shutter speed provided in the imaging apparatus.

15. A lens device according to claim 1 or 2, An imaging system characterized by having an imaging device equipped with an image sensor.

16. The imaging device according to claim 12 or 13, An imaging system characterized by having a lens device equipped with an aperture diaphragm and a first optical element for changing aberrations.

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