Class 359/747 - With four components

Subclass of Class 359 - Optical: systems and elements
Definition: Subject matter wherein the lens comprises four sections
No. of patents: 33
Last issue date: 09/08/2009

Number	Title	Issue Date
7586693	Telephoto lens To provide a lens system advantageous for downsizing a moving group and suitable for large aperture ratio formation and ultra telescopic formation while maintaining an excellent optical function from a long distance to a close range. A first lens group having...	09/08/2009
7253972	Telephoto lens system A telephoto lens system of a four-lens-group arrangement includes a negative first lens group, a positive or negative second lens group, a negative third lens group and a positive fourth lens group. The telephoto lens system of the four-lens-group arrangement is con...	08/07/2007
6927926	Telephoto lens and telephoto lens apparatus having the same A telephoto lens includes, in order from the object side, a first lens unit having a positive refracting power, a second lens unit having a negative refracting power, a third lens unit having a positive refracting power, and a fourth lens unit having a negative refr...	08/09/2005
6775074	Image pickup lens, and image pickup system using the same A compact optical system includes a reduced number of lens elements with a bendable optical path and so is compatible with miniature image pickup devices. The image pickup lens includes, in order from its object side, a first lens element having a negative refractin...	08/10/2004
6762889	Compact telephoto lens for grating scale position measuring system A telephoto lens for a grating scale measurement system includes a pair of aspheric lenses that together operate at finite conjugates with minimal spherical aberrations. Identical aspheric lenses provide a subsystem with a magnification of 1×, and a magnifying syst...	07/13/2004
6671106	Telescopic lens system A telescopic lens system includes a positive first lens group, and a positive second lens group. The first lens group includes cemented lens elements having a positive lens element and a negative lens element. The second lens group includes a positive len...	12/30/2003
6639721	Zoom lens system and optical apparatus using the same There are provided A zoom lens system comprising, in order from an object side, a first lens unit of negative refractive power, a second lens unit of positive refractive power, a third lens unit of negative refractive power, and a fourth lens unit of posi...	10/28/2003
6441968	Zoom lens and video camera and electronic still camera using this A zoom lens comprising, in the order of an increasing distance from an object; a fixed first lens group (1) having a positive refractive power; a second lens group (2) containing an aspherical surface, having a negative refractive power and being in charg...	08/27/2002
6414800	Variable magnification optical system and camera having the same A variable magnification optical system includes, in order from an object side to an image side, a first lens unit of positive refractive power, a second lens unit of negative refractive power arranged to move along an optical axis during variation of mag...	07/02/2002
6392817	Rear focus type zoom lens and optical apparatus using the same A rear focus type zoom lens has, in succession from the object side, a first lens unit L1 of positive refractive power, a second lens unit L2 of negative refractive power, a third lens unit L3 of positive refractive power and a fourth lens unit L4 of posi...	05/21/2002
6122111	High performance zoom lens system A high performance zoom lens system formed by multiple focus lens groups, multiple zoom lens groups and single auxiliary lens group aligned in that order on a common optical axis and arranged to collect radiation emanating from an object space and deliver...	09/19/2000
5909307	Optical system for infrared camera An optical system for use in an infrared camera which includes, in order from an object side: a first lens group having a negative refractive power and a second lens group having a positive refractive power arranged a distance from the first lens group. T...	06/01/1999
5805359	Wide-angle lens system The invention provides a solution to a problem of allowing a symmetrical wide-angle lens system to have a large aperture ratio, and achieves an optical system which is well improved in terms of sagittal coma and curvature of field, and has a satisfactory ...	09/08/1998
5627685	Telephoto lens system The invention provides a telephoto lens system that enables the camera operator to shoot an infinite to nearby object with stably maintained optical quality. This lens system comprises a first positive lens unit G1, a second positive lens unit ...	05/06/1997
5402268	Telephoto lens system allowing short-distance photographing operation A micro lens allowing a short-distance photographing operation from infinity to an equal magnification consists of, in order from the object side, a first lens group including a negative lens and having a positive refracting power, a second lens group hav...	03/28/1995
5323270	Internal focusing telephoto lens An internal focusing telephoto lens includes, in succession from the object side, a first lens unit of positive refractive power having at least a positive first lens component, a second lens unit having negative refractive power and movable along the opt...	06/21/1994
5274504	Zoom lens A simple zoom lens is disclosed having lens units of negative, positive and negative powers in this order from the object side, zooming from the wide-angle end to the telephoto end being performed by moving each lens unit toward the object side, and at le...	12/28/1993
5243468	Wide angle objective lens A wide angle objective lens has, in succession from the object side, a first lens component which is a positive meniscus lens having its convex surface facing the object side, a second lens component which is a cemented meniscus lens comprising a negative...	09/07/1993
5208702	Objective lens system for endoscopes An objective lens system for endoscopes comprising, in the order from the object side, a first lens component having a negative refractive power, a second lens component having a positive refractive power, an aperture stop arranged right after the second ...	05/04/1993
4904070	Telephoto lens system A compact high-performance telephoto lens system that has an aperture ratio of approximately 1:4 to 1:4.5, a half viewing angle of approximately 2° to 3° and a telephoto ratio of approximately 0.8. The lens system satisfies the following conditions: 0.4...	02/27/1990
4854686	Apochromat type objective lenses An apochromat type objective lenses, which is applied to an astronomical telescope; a telephoto lens for cameras or the like, comprising a semiapochromatic first lens system synthesized lens composed of two lenses in one group consisting of a convex lens ...	08/08/1989
4844601	Three-dimensional reflex lens systems Optical systems for use with attachments for a conventional reflex motion picture camera to permit stereographic cinematography are disclosed. The optical systems include lens systems having four powered elements having negative, positive, negative, and p...	07/04/1989
4596447	Conversion type varifocal lens system A conversion type varifocal lens system comprising a master lens which has a front assembly of positive power and a rear assembly of negative power, and a supplementary lens upon insertion into, or removal from, the space between the front and rear assemb...	06/24/1986
4303314	Compact telephoto lens A compact telephoto lens comprises, in succession from the object side, a first lens which is a single positive lens having its surface of sharper curvature facing the object side, a second lens which is a positive meniscus lens having its convex surface ...	12/01/1981
4303313	Photographic lens system A photographic lens system is constituted of four lens components and four lens elements, comprising a first lens component of a meniscus positive lens with its convex surface on the object side, a second lens component of a biconcave lens, a third lens c...	12/01/1981
4240703	Telephoto lens A telephoto lens having a relatively short focal length compared to what is generally accepted as the focal length of a telephoto lens and corrected for aberrational deviations throughout the focusing range. The lens comprises a positive first (counting f...	12/23/1980
4206971	Rear conversion lens A rear conversion lens comprises a divergent forward lens group comprising three components and a divergent rearward lens group comprising two components. The three components forming the forward lens group are, in order from the object side, a biconvex p...	06/10/1980
4198129	Varifocal lens system with three moving components An optical objective of variable focal length comprises a varifocal front lens group consisting of at least four components of alternating refractivity, namely a stationary negative first component, a movable positive second component, a movable negative ...	04/15/1980
4161350	Telescopic photographing lens system A telephoto lens system comprises four lenses which are, in order from the object, a positive lens, a negative lens, a positive lens each having a stronger curvature surface directed to the object, and the final lens is a negative meniscus lens concave to...	07/17/1979
4063802	Telephotographic lens system having short total length A telephotographic lens system short in its total length comprising a first positive meniscus lens component, a second positive meniscus lens component, a third negative meniscus lens component and a fourth positive cemented lens component which are so ad...	12/20/1977
4062630	Telephoto lens system A telephoto lens system having a relatively large aperture is composed of six lenses collected into four lens members, successively arranged, from the object side of the system to the image side, as follows: a first lens member including a positive lens w...	12/13/1977
4057330	Lens system having large relative aperture and long focus A lens system comprising, as viewed from the object side, a first positive lens member having its convex surface facing the object side, a second positive lens member having its convex surface facing the object side, a third lens member, and a fourth posi...	11/08/1977
4037935	High-speed adjustable focus telephoto objective lens A telephoto objective lens comprising a normally stationary front lens group having a positive power and a rear lens group having a negative power axially movable for focusing, the front lens group including at least two positive members and at least one ...	07/26/1977

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Class 359/747 - With four components