Olympus Optical Company, Ltd.

Akio Taira

Toshihiro Imai

Shin-ichi Mihara

Masaki Imaizumi

Ken-ichi Nakahashi

Takaharu Koike

Youichi Iba

An endoscope provided with a light receiving device on the eyepiece side in respect of an image guide and with a driving means for moving an objective lens near an eyepiece, to make the whole endoscope slim and to make it simple in formation despite its being provided with an automatic focus detecting mechanism.

Automatic focus detecting mechanism for endoscopes

A microscope optical system wherein a light is made to enter a beam splitter of a Jentzch type prism through another surface than the front surface of the beam splitter in order to form a Jentzch type binocular optical system to be small and simple and to be able to obtain a high quality object image.

Microscope tube system

An image posture converting optical system wherein a reflecting surface of a prism for bending a light path is reoriented by a fixed amount to correct an image posture. This optical system is simple in formation, can retain a favorable optical performance and can be made small.

Image posture converting optical system

A binocular stereo-microscope comprising a Porro prism arranged between each objective and eyepiece in which three prisms constituting the Porro prism are arranged that the second prism is inclined in respect to the first prism and the third prism is inclined in respect to the second prism, the Porro prism being thereby arranged to have the function of an optical axis deflecting prism, the binocular stereo-microscope thereby enabling to observe an image free from rotation.

Binocular stereo-microscope

A focusing device for microscopes provided with a light shielding plate having an aperture extending from the center to the outer edge and rotatable around an optical axis in the position of an exit pupil of an objective lens or its conjugate image in order to be able to make focusing accurately even in the case of using an objective lens of any magnification.

Focusing device for microscopes

An optical system for use with a tiltable lens barrel which houses an eyepiece system. The lens barrel is rotatable around an optical axis of light incident upon a reflecting member. The optical system directs light from an objective to the eyepiece system in cooperation with the reflecting member so as to change an axial tilt angle of the tiltable lens barrel and simultaneously to rotate an image rotator disposed in an optical path of light passing through the objective, thereby permitting a tilt of an observation image caused by the rotation of the tiltable lens barrel to be compensated.

Optical system for tiltable lens barrel of a microscope

An illumination system for microscopes which composes an illumination system for microscopy at high magnification level of a light source, a collector lens, a field stop, an aperture stop, a relay lens system for high magnification level and a condenser lens, and composes an illumination system for microscopy at low magnification level by using a relay lens system for low magnification level in place of said relay lens system for high magnification level and said condenser lens employed for composing the illumination system for microscopy at the high magnification level. Said illumination system is so adapted as to provide favorable illumination within a wide magnification range from 1.times. to 100.times..

Illumination system for microscopes

An apparatus for changing illumination optics is provided for use in a microscope including a plurality of illumination optics having different values of magnification. A photometric, light receiving element is disposed in a marginal area of an imaging surface of an objective lens, and an output from the photometric element is determined as the illumination optics are sequentially changed. A matching condition between the objective lens and the illumination optics is detected in accordance with the value determined, and that one of illumination optics is selected which represents the best match.

Apparatus for changing illumination optics of a microscope

A transmission type illumination equipment for microscopes comprising a condenser lens for high magnification level and an aperture stop arranged in the vicinity of the front focal point of said condenser lens for high magnification level which are so arranged as to be replaceable with a condenser lens for low magnification level and an aperture stop arranged in the vicinity of said condenser lens for low magnification level respectively. Said illumination equipment for microscopes is so adapted as to form an image of the light source at the position of a corresponding aperture stop when it is switched for illumination between high and low magnification levels, thereby assuring illumination in favorable conditions from ultra-low to high magnification levels.

Transmission type illumination equipment for microscopes

A transmitted illumination device for microscopes which can furnish brilliance for viewing, illuminate objects with uniform light and is compact in construction and easy in handling. The device consists of a collector lens, a detachably mounted additional lens system, a field stop, a rear lens system and a condenser lens, arranged in succession from a light source toward a test piece and optically aligned with each other. The additional lens system consists of front and rear components. The front component is composed of a convex lens and the rear component is composed of a convex lens followed by another convex lens. The rear lens system consists of front and rear components each composed of a convex lens.

Growing community of inventors

Hachiouji, Japan

Akio Taira