Imaging apparatus, imaging method, and imaging system
Provided is an imaging technique capable of detecting a focus even in an imaging apparatus of a speckle image. The imaging apparatus includes a coherent light source that irradiates an imaging object with coherent light, an incoherent light source that irradiates the imaging object with incoherent light, a speckle imaging unit that captures a speckle image obtained from scattered light of the imaging object irradiated with the coherent light, a non-speckle imaging unit that captures a non-speckle image obtained from reflected light of the imaging object irradiated with the incoherent light, and a focus detection unit that detects a focus of the speckle imaging unit on the basis of a focal position of the non-speckle imaging unit.
1. An imaging system, comprising:
a speckle imaging unit that captures a speckle image obtained from scattered light of an imaging object irradiated with coherent light;
a non-speckle imaging unit that captures a non-speckle image obtained from reflected light of the imaging object irradiated with incoherent light; and
a focus determination unit that determines a focus of the speckle imaging unit on the basis of a focal position of the non-speckle imaging unit.
2. The imaging system according to claim 1 , further comprising:
a focus adjustment unit that adjusts a focal length of the speckle imaging unit with respect to a focus of the non-speckle imaging unit; and
a display unit that displays the speckle image captured on the basis of the focus adjusted by the focus adjustment unit.
3. The imaging system according to claim 1 , further comprising
an aberration correction unit that corrects aberration occurring between the non-speckle imaging unit and the speckle imaging unit.
4. The imaging system according to claim 3 , wherein
the aberration correction unit corrects chromatic aberration.
5. The imaging system according to claim 1 , further comprising:
a coherent light source that irradiates the imaging object with the coherent light; and
an incoherent light source that irradiates the imaging object with the incoherent light.
6. The imaging system according to claim 5 , further comprising:
a region-of-interest specification unit that specifies an arbitrary region of interest in the non-speckle image captured by the non-speckle imaging unit; and
a light irradiation adjustment unit that adjusts an irradiation position of the coherent light source on the basis of specification information of the region of interest by the region-of-interest specification unit.
7. The imaging system according to claim 5 , wherein the coherent light and the incoherent light are guided through a medical observation apparatus and irradiate the imaging object.
8. The imaging system according to claim 7 , wherein the medical observation apparatus comprises at least one of an endoscope and a microscope.
9. The imaging system according to claim 1 , wherein the imaging object includes a living body or blood vessels.
10. An imaging method, comprising:
a speckle imaging step of capturing a speckle image obtained from scattered light of an imaging object irradiated with coherent light;
a non-speckle imaging step of capturing a non-speckle image obtained from reflected light of the imaging object irradiated with incoherent light; and
a focus determining step of determining a focus for capturing the speckle image on the basis of a focal position in the non-speckle imaging step.
11. The imaging method according to claim 10 , further comprising:
a coherent light irradiating step of irradiating the imaging object with the coherent light; and
an incoherent light irradiating step of irradiating the imaging object with the incoherent light.
12. The imaging method according to claim 11 , further comprising:
guiding the coherent light and the incoherent light through a medical observation apparatus and irradiating the imaging object.
13. The imaging method according to claim 12 , wherein the medical observation apparatus comprises at least one of an endoscope and a microscope.
14. The imaging method according to claim 10 , wherein the imaging object includes a living body or blood vessels.
15. The imaging method according to claim 10 , further comprising:
a focus adjustment step of adjusting a focal length of the speckle imaging step with respect to a focus of the non-speckle imaging step; and
a display step of displaying the speckle image captured on the basis of the focus adjusted in the focus adjustment step.
16. The imaging method according to claim 10 , further comprising:
an aberration correction step of correcting aberration occurring between the non-speckle imaging step and the speckle imaging step.
17. The imaging method according to claim 16 , wherein the aberration correction step corrects chromatic aberration.
18. The imaging method according to claim 10 , further comprising:
a region-of-interest specification step of specifying an arbitrary region of interest in the non- speckle image captured in the non-speckle imaging step; and
a light irradiation adjustment step of adjusting an irradiation position of a coherent light source on the basis of specification information of the region of interest specified by the region-of- interest specification step.