Olympus Optical Company, Ltd.

Kikusui Electronics Corporation

Masaaki Yamagishi

Kimihiko Nishioka

Toyoharu Hanzawa

Yoshihiro Kawano

Shinichi Nakamura

Takashi Fukaya

Hiroshi Fujiwara

Tomonori Ishikawa

Yasuo Inoue

Masahiko Kinukawa

Ken Yonekubo

Itaru Endo

Shigeo Tokunaga

Masami Hamada

Masahiko Shimizu

Fukuo Komaba

A stereomicroscope is equipped with an objective lens, a variable magnification optical system having an optical axis common with that of the objective lens, a splitting optical system splitting emergent light from the variable magnification optical system into a plurality of optical paths, and an eyepiece disposed in at least one of the optical paths, having a diameter larger than the interpupil distance of an observer. Thus, the stereomicroscope has advantages that, with a simple structure and easy adjustment, many people can make observations, the mountings of photographic and TV devices are possible, the directions in which plural observers see through the microscope can be changed, and eyestrain is difficult to occur which may be caused by the difference in magnification between the images of a bilateral observation optical system.

Stereomicroscope wherein the distance between a pair of beams remains

Stereomicroscope including a single variable magnification optical system

A stereomicroscope includes an objective lens used in common and a pair of observing optical systems on the left and right sides, arranged behind the objective lens so that optical axes of the observing optical systems are symmetrically arranged at a predetermined angle with respect to an optical axis of the objective lens. In the stereomicroscope, the objective lens may be arranged so that a focal length of the objective lens has a positive value and an object is located closer to the objective lens than an object focal point of the object lens, and thereby an image which is high in resolution and favorable in flatness is brought about.

Stereomicroscope including an objective with positive and negative

In a switching power supply circuit, a forward converter includes first to third switching transistors and a switching transformer having first and second primary windings. The first to third switching transistors are connected via series-connected first and second primary windings to a high voltage DC source. While the first to third transistors are simultaneously turned off, magnetic fluxes induced in the switching transformer are completely reset.

Switching power supply circuit including forward converter

An inverted-design optical microscope wherein, in order to lower the level of stage and the total height of a microscope body and to simplify the switching operation between an observing light path and photographing light paths, a second optical means for leading a light from an object to be inspected to the observing light path is arranged below a first optical means for leading said light alternatively to a plurality of phtographing light paths, the second optical means and first optical means are arranged respectively as fixed and movably, and a plurality of optical elements forming the first optical means and so many focusing mirrors are moved integrally by a single operating handle.

Inverted-design optical microscope

A microscope objective comprising a first lens component arranged as a positive meniscus lens, a second lens component arranged as a positive lens, a third lens component having positive refractive power, a fourth lens component having positive refractive power, a fifth lens component having negative refractive power, and a sixth lens component arranged as a cemented positive meniscus lens, the microscope objective being arranged that the working distance is extremely long, aberrations are corrected extremely favorably up to the marginal portion of field, and magnification is 40.times..

Microscope objective

A microscope objective comprising a first, second, third, fourth, fifth and sixth lens components wherein the first lens component is a positive meniscus lens concave toward the object side, the second lens component comprises a positive lens and has positive refractive power as a whole, the third lens component comprises a positive lens and has positive refractive power as a whole, the fourth lens component is a cemented negative meniscus lens convex toward the object side, the fifth lens component is a cemented negative meniscus lens convex toward the image side, and the sixth lens component is a cemented positive meniscus lens, the microscope objective being arranged that the working distance is very long, the image surface is flat, and aberrations are favorably corrected up to the marginal portion of field.

Growing community of inventors

Hachiouji, Japan

Masaaki Yamagishi