Nikon Corporation

Sumitomo Electric Industries, Limited

Nec Corporation

Fuji Xerox Co., Ltd.

Nippon Telegraph and Telephone Corporation

Victor Company of Japan, Limited

Matsushita Communication Industrial Co., Ltd.

Fumio Suzuki

Kotaro Yamaguchi

Shigemasa Sato

Nobuhiro Akasaka

Makoto Honjo

Naoshi Aikawa

Hiroshi Shimba

Masao Yuto

Yosuke Kusaka

Hiroyuki Iwasaki

Yuki Yoshida

Toshimi Watanabe

Yoshinari Hamanishi

Mitsuo Sato

Masao Owashi

Tsutomu Narisawa

Masahiro Mizuta

Hiroaki Nakayama

Yoshitoshi Murata

Tadao Hashimoto

Satoru Moriya

Norio Miyake

Kenji Tazaki

Masahiko Hirono

Toshihiko Shibata

Isao Kishikawa

A scanning optical system (SL) comprises a first lens group (G) having a negative refractive power, a second lens group (G) having a positive refractive power, and a third lens group (G) having a negative refractive power. At least one lens included in any of the first to the third lens groups has a positive refractive power, and satisfies the conditional expression 'νd1>80'. At least one lens included in any of the first to the third lens group has a negative refractive power, and satisfies the conditional expression “νd2<50”. The scanning optical system satisfies the conditional expression “h max≥18.0 [mm]”.

Scanning optical system and scanning-type confocal microscope

A microscope including an illumination optical system having an objective lens and a fly-eye lens, where: the fly-eye lens having a plurality of lens elements; in the illumination optical system, images of the plurality of lens elements are projected on a pupil of the objective lens; and the number (n) of the images of the lens elements projected inside the pupil of the objective lens is more than the number (n) of the images of the lens elements projected on an outer perimeter of the pupil of the objective lens. In the above observation optical system, a first objective lens having a first pupil diameter and a second objective lens having a pupil diameter larger than the first pupil diameter are switchable, and a number nmay be greater than a number nwith respect to the first objective lens.

Microscope including an illumination optical system having a plurality of lens elements

A confocal scanning microscope including: an objective system (second objective lensand objective lens) illuminating a sample SA with illumination light; a scanning mechanismscanning the sample SA to obtain an intensity signal; and a scanning optical systemprovided between the scanning mechanism and the objective system. The scanning optical system composed of, in order from the scanning mechanism side, a first positive lens group G1, a second negative lens group G2, and a third positive lens group G3. The third lens group has two chromatic aberration correction portions each formed by a positive lens and a negative lens or negative lens and positive lens. Glass materials are selected such that one performs chromatization and the other performs achromatization, thereby providing a confocal scanning microscope capable of correcting lateral chromatic aberration generated in the objective system in the specific wavelength region by the scanning optical system.

Confocal scanning microscope

A billing management system includes an image forming device that forms an image, a reading device that reads identification information from an information recording medium that stores the identification information identifying a user of the image forming device, a billing condition management device that manages, in an associated state, the identification information and a billing condition, and a billing information transmitting unit that references the identification information and the billing condition, managed by the billing condition management device, and transmits billing information in accordance with the billing condition corresponding to the identification information read by the reading device.

Billing management system and billing management method

An optical system including, in order from an object: a first lens group having positive refractive power; a second lens group having negative refractive power; a third lens group having positive refractive power; and a fourth lens group having negative refractive power. The second lens group has, in order from the object, a front group having negative refractive power and a rear group. In various embodiments, the following conditional expressions are satisfied, 0.4&#x3c;f2F/f2&#x3c;1.6 and &#x2212;3.0&#x3c;q2&#x3c;&#x2212;0.3 where f2 denotes a focal length of the second lens group, f2F denotes a focal length of the front group, and q2 denotes a form factor of a negative lens disposed closest to the object of the front group.

Variable power optical system for stereomicroscope

A confocal scanning microscope including: an objective system (second objective lensand objective lens) illuminating a sample SA with illumination light; a scanning mechanismscanning the sample SA to obtain an intensity signal; and a scanning optical systemprovided between the scanning mechanism and the objective system. The scanning optical system composed of, in order from the scanning mechanism side, a first positive lens group G, a second negative lens group G, and a third positive lens group G. The third lens group has two chromatic aberration correction portions each formed by a positive lens and a negative lens or negative lens and positive lens. Glass materials are selected such that one performs chromatization and the other performs achromatization, thereby providing a confocal scanning microscope capable of correcting lateral chromatic aberration generated in the objective system in the specific wavelength region by the scanning optical system.

It is an object to provide a zoom microscope of a simple structure which can expand a variable-power range. In order to achieve the object thereof, the zoom microscope includes a replaceable infinity correction objective lens, an aperture stop, an afocal zoom system, and an imaging optical system which are arranged in this order from a specimen side. Further, the aperture stop is disposed on or near a rear focal plane of the objective lens.

Zoom microscope

A zoom lens system for a microscope includes, in the following order from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, and a fourth lens group having a positive refractive power. Magnification of the zoom lens system is varied by moving the second lens group and the third lens group. The zoom lens system has an entrance pupil on the object side of the first lens group, and the following conditions are satisfied:&#x2212;1.3&#x3c;&#x3b2;2&#x3c;&#x2212;0.7&#x2212;0.1&#x3c;1/&#x3b2;3&#x3c;0where &#x3b2;2H is the magnification of the second lens group in the highest magnification state, and &#x3b2;3L is the magnification of the third lens group in the lowest magnification state.

Zoom lens system for microscope and microscope using the same

A relay optical system is disclosed that comprises, in axial order from the object side, first, second, third, and fourth lens groups having a negative, a positive, a positive, and a negative refractive power, respectively. An aperture stop is between the second and third lens groups. Relative to the aperture stop, the first lens group is symmetrical with the fourth lens group and the second lens group is substantially symmetrical with the third lens group. The relay optical system fulfills at least the conditions:

Relay optical system

A camera having a line of sight detecting device, includes a line of sight detection portion for detecting the line of sight position of a photographer, a portion of selection of a line of sight mode for selecting one of a single mode for locking a line of sight position obtained when a plurality of previous detection results of the line of sight detection portion satisfy a predetermined eye-gazing condition and a continuous mode for renewing the line of sight position on the basis of the latest line of sight position from the line of sight detection portion, a control mode setting portion for selecting a control mode for setting a camera phototaking condition, and a phototaking control for setting the camera phototaking condition in accordance with the line of sight position of the photographer when the control mode is selected, wherein when the control mode is selected by the control mode setting portion, the continuous mode is selected by the portion of selection of a line of sight mode, and the camera phototaking condition is set by the phototaking control in accordance with the line of sight position in the continuous mode.

Camera having line of sight detecting device

A taking lens for an underwater camera is constituted in the order from the side of a subject of a first lens group having no or slight refracting power, a second lens group having a positive refracting power, a third lens group having positive refracting power and a fourth lens group having negative refracting power. When focusing from the infinity to a closer distance, the first lens group is fixed to the image surface and the second and third lens groups are moved forward along the optical axis such that the distance between the second and third lens groups is changed.

Taking lens for underwater camera

A camera with a device for detecting the line of sight is provided with a first light source for detecting the corneal reflected image of the eye and a second light source for detecting the boundary between the pupil and the iris or between the iris and the white of the eye, thereby effecting illuminations for these purposes with optimum illumination intensities. Thus the position of the Purkinje's first image and the central position of the pupil can be detected efficiently, and the direction of the line of sight can be accurately calculated.

Camera with device for detecting line of sight

A high-aperture-ratio inner-focus telephoto lens comprises a first lens group of positive refracting power, a second lens group of negative refracting power and a third lens group of positive refracting power arranged in the named order from the object side, in which the first lens group and the second lens group form a substantially afocal system, focusing is effected by moving the second lens group along the optical axis, and the first lens group has a front group of positive refracting power and a rear group of weak positive refracting power arranged in the named order from the object side.

High-aperture-ratio inner-focus telephoto lens

In a camera with a line of sight detecting device, the optical axes of an observation optical system, illuminating means and photoelectric converting means are disposed so as to differ from one another, whereby it never happens-that in the observation optical system, illuminating light creates ghost, and the calculation of the direction of line of sight can be accomplished effectively.

Camera with a line of sight detecting device

A lens for an underwater camera is comprised of a first lens unit having no refractive power or having weak refractive power, a second lens unit comprising a forward unit having negative refractive power and a rearward unit having positive refractive power, and having weak refractive power, a third lens unit having positive refractive power, and a fourth lens unit having negative refractive power, the first lens unit being fixed relative to the image plane, the second lens unit and the third lens unit being axially moved together on the optical axis toward the object side relative to the fourth lens unit.

Growing community of inventors

Yokohama, Japan

Fumio Suzuki