Olympus Corporation

Olympus Imaging Corporation

Takahiro Amanai

Masahito Watanabe

Kyoko Iijima

Hisashi Goto

Masahiro Imamura

Takayuki Mimura

Akio Michinaka

Shinichi Mihara

Kazuya Nishimura

Tetsuhide Takeyama

Masachika Watanabe

Kenichiro Abe

Masashi Hankawa

Toru Miyajima

Ayami Imamura

Kouki Hozumi

Takayoshi Togino

Shinya Takahashi

Tsutomu Uzawa

Keisuke Takada

Takashi Fujikura

Takuya Otsu

Ryosuke Uemura

A relay optical system includes a cemented lens in which a first lens, a second lens, and a third lens having are cemented. The first lens is a meniscus lens which is adjacent to the third lens, and a dispersion and a partial dispersion ratio differ for the first lens and the third lens. In a rectangular coordinate system in which a horizontal axis is set to be &#x3bd;dLA and a vertical axis is set to be &#x3b8;gFLA, when a straight line expressed by &#x3b8;gFLA=&#x3b1;&#xd7;&#x3bd;dLA+&#x3b2;LA (where, &#x3b1;=&#x2212;0.00163) is set, &#x3b8;gFLA and &#x3bd;dLA of medium of the first lens are included in an area determined by the following conditional expression (1) and conditional expression (2), and the following conditional expression (3) is satisfied:0.67&#x2264;&#x3b2;&#x2003;&#x2003;(1)&#x3bd;&#x3c;50&#x2003;&#x2003;(2)&#x2212;1.4&#x3c;&#x3c;&#x2212;0.6&#x2003;&#x2003;(3).

Relay optical system, and optical system for rigid endoscope and rigid endoscope using the same

A relay optical system includes an object-side lens which is disposed nearest to an object, an image-side lens which is disposed nearest to an image, and a cemented lens having a positive refractive power. The object-side lens has a positive refractive power and is disposed such that a convex surface is directed toward an object side. The image-side lens has a positive refractive power and is disposed such that a convex surface is directed toward an image side. A plurality of the cemented lenses is disposed between the object-side lens and the image side lens and the following conditional expression (1) is satisfied:0.04&#x3c;&#x3c;0.4&#x2003;&#x2003;(1)

Bright relay optical system, and optical system for rigid endoscope and rigid endoscope using the same

An image pickup apparatus includes an image forming optical system which includes an aperture stop that determines an axial light beam, and one cemented lens, and an image pickup section which is disposed on an image side of the image forming optical system, and which has a surface which is not flat and is curved to be concave toward the image forming optical system, wherein the cemented lens includes in order from an object side, a first lens having a negative refractive power, a second lens, and a third lens having a positive refractive power.

Image pickup apparatus

An image pickup apparatus includes an image forming optical system which includes an aperture stop that sets an axial light beam, and a diffracting optical surface disposed at a position different from a position where the aperture stop is disposed, and an imager which is disposed on an image side of the image forming optical system, and has a light-receiving surface which is not flat and is curved to be concave toward the image forming optical system, wherein the diffracting optical surface satisfies the following conditional expression (1).0.1&#x3c;||&#x2264;1.0&#x2003;&#x2003;(1)

Image pickup apparatus and capsule endoscope

An image pickup apparatus includes an image forming optical system having lens components and an image pickup unit, and the lens component is a lens having an object-side surface and an image-side surface that are in contact with air in an effective optical path, and the image forming optical system includes in order from an object side to an image side, an object-side lens component and an image-side lens component, and the image pickup unit has an image pickup surface curved to be concave toward the object side, and a surface nearest to the object of the object-side lens component has a concave shape portion which is concave shape toward the object side in a meridional direction, in at least an off-axis effective surface, and a surface nearest to the image of the image-side lens component is a curved surface.

Image forming optical system, image pickup apparatus, optical apparatus, and capsule endoscope

An image pickup apparatus includes an image forming optical system having an aperture stop, a first lens, and a second lens, and an imager having a light-receiving surface that is curved to be concave toward the image forming optical system, and a relative partial dispersion for a medium of the first lens differs from a relative partial dispersion for a medium of the second lens, and when a straight line indicated by &#x3b8;gF=&#x3b1;&#xd7;&#x3c5;d+&#x3b2;(where &#x3b1;=&#x2212;0.00163) has been set, &#x3b8;gFand &#x3c5;dfor the medium of the first lens are included in both of an area determined by the following conditional expression (1) and an area determined by the following conditional expression (2), and the following conditional expression (3) is satisfied:0.68&#x3c;&#x3b2;&#x2003;&#x2003;(1),&#x3c5;&#x3c;50&#x2003;&#x2003;(2), and0&#x3c;||&#x2264;1.5&#x2003;&#x2003;(3).

Image pickup apparatus which corrects chromatic aberration in a wide wavelength range, and capsule endoscope

An image pickup apparatus includes an image forming optical system which includes an aperture stop and a plurality of lens components, and an image pickup section which is disposed on an image side of the image forming optical system, and has a light-receiving surface which is not flat and is curved to be concave toward the image forming optical system. The image forming optical system includes a first lens component having a negative refractive power, a second lens component having a positive refractive power, and a third lens component having a positive refractive power. A shape of the first lens component is a meniscus shape, and a shape of the third lens component is a biconvex shape, and the following conditional expressions (1) and (2) are satisfied:0.7&#x3c;|PS&#xd7;img|&#x3c;1.5&#x2003;&#x2003;(1), and0.7&#x3c;|&#x3b8;out 90/&#x3b8;img 90|&#x3c;1.5&#x2003;&#x2003;(2).

An image pickup apparatus includes an image forming optical system which includes an aperture stop and a plurality of lens components, and an image pickup section which has a light-receiving surface which is not flat but is curved to be concave toward the image forming optical system. The image forming optical system includes a first lens component having a negative refractive power, a second lens component having a positive refractive power, and a third lens component having a positive refractive power. In the first lens component, a lens surface on the object side is convex toward the object side, and in a lens surface on the object side of the second lens component, a part of an area is concave toward the object side. Moreover, the following conditional expression (1) is satisfied:0.5&#x3c;(1+1)/(1&#x2212;1)&#x3c;2.5&#x2003;&#x2003;(1).

A variable magnification optical system is an optical system in which, a magnification ratio varies from a lower magnification end to a high magnification end, and includes at least a first lens unit having a positive refractive power, which is disposed nearest to an object, and a second lens unit having a positive refractive power, which is disposed on an image side of the first lens unit. At the time of varying magnification, a distance between the first lens unit and the second lens unit changes, and the following conditional expression (1) is satisfied:0&#x3c;1/&#x3b2;&#x3c;1&#x2003;&#x2003;(1),

Variable magnification optical system, and image pickup apparatus and image pickup optical system using the same

A wide-angle optical system includes in order from an object side to an image side, a first lens having a negative refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, an aperture stop, a fourth lens having a positive refractive power, and a fifth lens. An object-side surface of the first lens is convex toward the object side, and the following conditional expression (1) is satisfied.1.0&#x3c;(11)/(11)&#x2264;2.0&#x2003;&#x2003;(1)

Wide-angle optical system and image pickup apparatus using the same

A zoom lens includes in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a fourth lens unit having a negative refractive power, and includes an aperture stop which is disposed between the second lens unit and the fourth lens unit, and the first lens unit includes a negative lens and a plurality of positive lenses, and at the time of zooming from a wide angle end to a telephoto end, a distance between the first lens unit and the second lens unit widens, a distance between the second lens unit and the third lens unit narrows, and a distance between the third lens unit and the fourth lens unit changes, and the zoom lens satisfies predetermined conditional expressions.

Zoom lens and image pickup apparatus using the same

A zoom lens includes in order from an object side, a first lens group having a negative refractive power, a second lens group having a positive refractive power, a third lens group having a negative refractive power, and a fourth lens group having a positive refractive power, and at the time of zooming, the first lens group is fixed, the second lens group moves, the third lens group moves, and the fourth lens group is fixed. The first lens group includes in order from the object side, a negative lens, a reflecting optical element, and a positive lens. The second lens group includes in order from the object side, an aperture stop, a positive lens, a cemented lens having a negative refractive power, and a positive lens. The cemented lens includes a positive lens and a negative lens.

Zoom lens, image pickup apparatus using the same, and information processing apparatus

During zooming from the wide angle end to the telephoto end, the distance between the first lens unit having a positive refractive power and the second lens unit having a negative refractive power, the distance between the second lens unit and the third lens unit having a positive refractive power, and the distance between the third lens unit and the fourth lens unit having a negative refractive power vary. In zooming from the wide angle end to the telephoto end, the first lens unit is located closer to the object side at the telephoto end than at the wide angle end. The first lens unit consists of two lenses including a negative lens and a positive lens. The first lens unit has at least one aspheric surface in the optical path. The zoom lens satisfies the following conditional expression (1):0.5&#x3c;(/&#x3b2;)/&#x3c;1.0&#x2003;&#x2003;(1).

An optical system comprises, in order from the object side, an aperture stop, a first lens with positive refracting power, a second lens with negative refracting power, and a third lens, both surfaces of the third lens are an aspherical surface in which refracting power varies in accordance with distance from the optical axis in such a way that the both surfaces have a convex shape facing toward the object side in the vicinity of the optical axis and have a concave shape facing toward the object side in the vicinity of the outer circumference, and the following conditions (1) and (2) are satisfied:2.2&#x3c;&#x3c;7&#x2003;&#x2003;(1)&#x2212;0.04&#x3c;&#x3c;0.04&#x2003;&#x2003;(2)where dis the thickness of the first lens on the optical axis, dis a space distance between the first and second lenses on the optical axis, f is a focal length of the whole of the wide angle optical system, and fis a focal length of the third lens.

Growing community of inventors

Hachioji, Japan

Takahiro Amanai