Patent ID: 6052533
Filing Date: 2000-04-18
Classification: G03B

Abstract:
An optical apparatus comprising:an eyepiece;a focusing screen onto which an image is projected;illuminating means for illuminating an eye with infrared light;a reflecting device having a hollow portion and including a roof type mirror and a dichroic mirror that reflects visible light and transmits infrared light therethrough, said reflecting device reflecting light incident thereon from said focusing screen so that the light enters said eyepiece and the image is viewable therethrough, the dichroic mirror of said reflecting device including a flat glass plate having a film vapor deposited thereon and transmitting infrared light reflected from the eye and incident on the dichroic mirror through the eyepiece and the hollow portion of the reflecting device;an imaging optical system that receives infrared light incident thereon from the eye through said eyepiece and the dichroic mirror of said reflecting device, and forms an image of the eye using the infrared light reflected from the eye; andphotoelectric converting means for receiving the image of the eye.