Olympus Medical Systems Corporation

Olympus Corporation

Mitsubishi Electric Corporation

Daisuke Akiyama

Takeshi Suga

Masato Toda

Tomoya Takahashi

Yusuke Yabe

Koji Omori

Takahiro Masaki

Yutaka Shirota

Hironori Yabuuchi

Akira Yatsuyanagi

Mitsuhiro Ikeda

Yuki Nakao

Yu Tamaki

Tatsuya Ishimori

Takayuki Tarui

Yasushige Ishihara

Tsutomu Uzawa

Kazuhiro Gono

Katsuichi Imaizumi

Hiroaki Kinoshita

Satoshi Takekoshi

Hiroshi Tsuyuki

Atsushi Goto

Atsushi Okawa

Toshihiro Hamada

Yoshiharu Takasugi

Akihito Miyata

Makoto Tanabe

Takuya Takechi

Keiji Murata

Shinji Egami

Masao Akai

Shirota Yutaka

Takahashi Tomoya

Outdoor unit for air conditioner

An endoscope system including a control section that controls an LED driving section to supply driving currents to LEDs of a plurality of colors to cause the LEDs to emit lights in a frame-sequential manner and a processor that divides a total exposure period in one frame period of the frame-sequential light emission into ratios of light emission periods for each of the respective colors obtained by dividing light amount ratios of the lights of the plurality of colors, which should be received in a CCD, respectively by respective maximum light emission intensities of the LEDs of the plurality of colors and sets respective maximum light emission periods of the LEDs of the plurality of colors.

Endoscope system with frame-sequential light emission

An endoscope observation system includes a light source section generating different types of light in at least partly different wavelength bands for observation of a polarized light-based observation image and for observation of a non polarized light-based observation image, respectively; an irradiation side polarization separation element subjecting the illumination light from the light source section to polarization separation; a light reception side polarization separation element performing polarization separation, in a particular wavelength band of the light from the observation target, by transmitting polarized light with a predetermined polarization component while reflecting polarized light with a polarization component other than the predetermined polarization component, and in a wavelength bend other than the particular wavelength band, exhibiting same transmission and reflection characteristics for both polarized light and non polarized light; and an image pickup element receiving the transmitted or reflected light.

Endoscope observation system

Provided is an endoscope system including: a light source apparatus detecting which color LED fails by a color sensor; a scope that irradiates a subject with illuminating light and takes in an optical image of the subject; a CCD that picks up an image of the optical image of the subject; a video processor that processes the picked up image; and a monitor that displays a processed image, wherein if a failure of any of the LEDs is detected by the color sensor, the light source apparatus generates illuminating light using LEDs of colors other than a color of the light-emitting device for which the failure is detected, and wherein the video processor switches image processing to image processing according to a color of the LED for which the failure is detected.

Endoscope system

Provided is an endoscope apparatus including a light-guiding part that guides illumination light emitted from a light source to the distal end of an inserted portion; a scanning part that makes the light-guiding part vibrate with a predetermined period, thus two-dimensionally scanning the illumination light emitted from the inserted portion on an observation subject; an image-acquisition part that receives return light of the illumination light coming from the observation subject and that generates an image signal based on a position scanned by the scanning part and an intensity of the return light; and a light-source control part that controls the light source so as to change the intensity of the illumination light emitted from the inserted portion in accordance with an angle formed between the longitudinal direction of the inserted portion and a direction in which the illumination light is emitted toward the observation subject.

Endoscope apparatus

A light source apparatus that generates a light to be supplied to an endoscope, which includes: LEDs of respective colors that emit lights; collimator lenses that receive emitted lights and emit the received lights; and illuminance sensors arranged at positions where the illuminance sensors can receive both of leak lights of the lights emitted from the LEDs of respective colors, which are not used as illumination lights, and lights emitted from the LEDs of respective colors and reflected by the collimator lenses.

Light source apparatus having a light emission intensity detection section receives both of a leak light and a light emitted from the light source and reflected by an optical element

The invention provides lenses at low cost, which form an illumination optical system for endoscopes that has high efficiency and achieves improved light distribution. The illumination optical system for endoscopes is used in opposition to a light beam exit endof a transmission means F for light emitted from a light source, and comprises, as viewed from the light beam exit end, a lens grouphaving positive power and an optical membersubsequent thereto which has a spherical surfacethat functions as a lens, has a radius of curvature R, and satisfies the following condition:1.48&#x2266;&#x2266;4&#x2003;&#x2003;(1)where

Illumination optical system for endoscopes

An endoscope includes an insertion portion including an image pickup section, an illumination section, and a light guide inserted inside the insertion portion, the light guide including a plurality of fibers made of a glass not containing lead, the plurality of fibers guiding illuminating light from a light source apparatus to the illumination section, the light guide having a numerical aperture of 0.46 to 0.90. A core glass of a fiber have a refractive index nd of 1.56 to 1.74, and a composition of (A) 20 to 55 wt % SiO, (B1) 0 to 4.0 wt % BO, (B2) neither POnor GeOcontained, (C) 25 to 72 wt % (BaO+SrO+LaO+LuO+TaO+GdO+WO), (D) 0 to 30 wt % ZnO, (E) no AlOcontained, (F) no ZrOcontained, (G) neither PbO nor AsOcontained, (H) 0 to 15 wt % (NaO+KO), (I) 0 to 0.050 wt % SbOand (J) 0.26 to 1.63 wt % (NaSO+KSO).

Endoscope

An endoscope for oblique viewing including an image pickup device, a front lens group having a positive refractive power, a prism disposed on the CCD side of the front lens group, and a rear lens group disposed on the CCD side of the prism and having a positive refractive power.

Endoscope for oblique viewing

In an endoscope apparatus, inside an endoscope, color correction processing is performed that performs multiplication between a color correction coefficient that is set based on a plurality of numerical apertures with respect to a plurality of different wavelengths included in a wavelength band of illuminating light of a light guide that is mounted in the endoscope and that transmits light-source light from a light source apparatus, and at least one of B, G and R signals generated by the signal processing apparatus.

An endoscope includes: a first illumination optical system which emits illuminating light in a first linear polarization direction to an object from a distal end face of an insertion portion; and a first objective optical system which allows return light from the object to enter through an objective window provided in the distal end face; wherein the first illumination optical system and the first objective optical system are placed in a positional relationship such that on the distal end face, a line segment connecting an optical axis of the first illumination optical system and an optical axis of the first objective optical system is parallel or perpendicular to a polarization direction which results when the illuminating light emitted from the first illumination optical system is projected to the distal end face, and no polarizing element is provided between the object and the objective window.

Endoscope and endoscope apparatus

An optical imaging device of the present invention comprises: a light source device; a light guide and illumination lens, provided in an insertion section that can be inserted into a body cavity, for constituting an illumination light path for guiding an illumination light from the light source device to a subject; an objective lens for receiving return lights from the subject; an image capturing section for acquiring a visible light band image from the return light; an excitation light cut filter and image capturing section for acquiring a fluorescent image from the return lights; and an illumination light filter, provided on the illumination light path, for decreasing light in a band overlapping with the band of light of which image is captured by the image capturing section from the illumination light incident on.

Optical imaging device having illumination light filter section

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Fuchu, Japan

Daisuke Akiyama