Patent ID: 9182586
Filing Date: 2015-11-10
Classification: A61B,G01B,G01J,G02B

Abstract:
1. An endoscope comprising: a first objective lens that is disposed in an insertion portion to be inserted into a lumen, and forms an image of an object to be observed that is in a first observation direction; a second objective lens that is disposed in the insertion portion, and forms an image of an object to be observed that is in a second observation direction that is different from the first observation direction; a light guide that guides an illuminating light that is emitted from a light source to the insertion portion; a light distribution member that distributes light from the light guide between the first observation direction and the second observation direction; light amount varying means for changing proportions of light amounts with respect to illuminating light emitted in the first observation direction and illuminating light emitted in the second observation direction that the light distribution member distributes; a distance detection portion that measures a second distance between the second objective lens and an object to be observed that is in the second observation direction; and a control portion that controls the light amount varying means based on a signal relating to the second distance that is outputted from the distance detection portion.