LIGHT SOURCE APPARATUS AND LIGHT-ADJUSTING METHOD FOR LIGHT SOURCE APPARATUS
First Claim
1. A light source apparatus comprising:
- a light source for supplying illumination light to a subject;
an illumination light amount adjusting section capable of adjusting an emission amount of the illumination light;
an illumination light amount control section that causes the illumination light amount adjusting section to execute adjustment of the emission amount of the illumination light on the basis of a light amount control signal generated based on brightness of an image obtained by picking up an image of the subject;
an illumination mode switching control section that switches between a first illumination mode in which first light is emitted as the illumination light and a second illumination mode in which second light is emitted as the illumination light, the second light having a wavelength band, at least a part of the wavelength band being different from a wavelength band of the first light; and
a switching instruction section that gives an instruction for switching between the first illumination mode and the second illumination mode,wherein, during a period after an instruction for switching from one of the first illumination mode and the second illumination mode to the other of the first and second illumination modes is given by the switching instruction section until the switching by the illumination mode switching control section is completed, the illumination light amount control section maintains the light amount control signal at a predetermined value corresponding to the illumination mode after the completion of the mode switching, and causes the illumination light amount adjusting section to execute adjustment of the emission amount of the illumination light on the basis of the maintained value.
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Accused Products
Abstract
A light source apparatus includes: a lamp, a diaphragm device, a CPU that causes the diaphragm device to execute adjustment of an emission amount of illumination light on the basis of a target brightness signal generated based on brightness of an image obtained by picking up an image of a subject; a CPU that switches between illumination modes, and a mode switching switch. During a period after an instruction for switching from one of an illumination mode corresponding to normal light observation mode and an illumination mode corresponding to special light observation mode to the other is given until the switching by the CPU is completed, the CPU causes the diaphragm device to execute adjustment of the emission amount of the illumination light based on a correction value obtained by correcting a current diaphragm value at the time when the instruction for switching is given using a predetermined coefficient.
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Citations
14 Claims
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1. A light source apparatus comprising:
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a light source for supplying illumination light to a subject; an illumination light amount adjusting section capable of adjusting an emission amount of the illumination light; an illumination light amount control section that causes the illumination light amount adjusting section to execute adjustment of the emission amount of the illumination light on the basis of a light amount control signal generated based on brightness of an image obtained by picking up an image of the subject; an illumination mode switching control section that switches between a first illumination mode in which first light is emitted as the illumination light and a second illumination mode in which second light is emitted as the illumination light, the second light having a wavelength band, at least a part of the wavelength band being different from a wavelength band of the first light; and a switching instruction section that gives an instruction for switching between the first illumination mode and the second illumination mode, wherein, during a period after an instruction for switching from one of the first illumination mode and the second illumination mode to the other of the first and second illumination modes is given by the switching instruction section until the switching by the illumination mode switching control section is completed, the illumination light amount control section maintains the light amount control signal at a predetermined value corresponding to the illumination mode after the completion of the mode switching, and causes the illumination light amount adjusting section to execute adjustment of the emission amount of the illumination light on the basis of the maintained value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A light-adjusting method for a light source apparatus, comprising:
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executing adjustment of an emission amount of illumination light of the light source apparatus on the basis of a light amount control signal generated based on brightness of a subject by an illumination light amount adjusting section of the light source apparatus; and during a period after an instruction for switching from one of a first illumination mode in which first light is emitted as the illumination light and a second illumination mode in which second light having a wavelength band, at least a part of which is different from a wavelength band of the first light, is emitted as the illumination light to the other of the first and second illumination modes is given until the switching is completed, maintaining the light amount control signal at a predetermined value corresponding to the illumination mode after the completion of the mode switching, and executing adjustment of the emission amount of the illumination light on the basis of the maintained value by the illumination light amount adjusting section. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification