Patent ID: 7164471

Claim:
A microscope apparatus comprising: a microscope; an first optical element having a preset transmittance with respect to light in a pre-set wavelength region, incident from the microscope; and an electronic image sensor receiving the light transmitted through the first optical element, wherein: the first optical element has a transmittance of 50±10% or less, and the first optical element is placed so that a coated surface of the first optical element satisfies the following condition: 2 ×L 1×tan 2 θ+L 1×tan 4 θ≧L 2/2 where LI is a distance extending along an optical axis from the coated surface of the first optical element to a light-receiving surface of the electronic image sensor, L 2 is a length of a minor side of an effective imaging area in a light-receiving section of the electronic image sensor, and θ is an angle made by a reference axis with the coated surface of the first optical element, where a direction perpendicular to the optical axis is assumed as the reference axis.