Abstract: A zoom lens includes a first lens group, a second lens group, a third lens group, a fourth lens group, a fifth lens group and a sixth lens group, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens group is with positive refractive power. The second lens group is with negative refractive power. The third lens group is with positive refractive power. The fourth lens group is with negative refractive power. The fifth lens group is with positive refractive power. The zoom lens satisfies the following condition: |fw/f6<0.15, wherein fw is an effective focal length of the zoom lens at a wide-angle end and f6 is an effective focal length of the sixth lens group.

Abstract: A zoom lens includes a first lens group, a second lens group, a third lens group, a fourth lens group, a fifth lens group and a sixth lens group, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens group is with positive refractive power. The second lens group is with negative refractive power. The third lens group is with positive refractive power. The fourth lens group is with negative refractive power. The fifth lens group is with positive refractive power. The zoom lens satisfies the following condition: |fw/f6<0.15, wherein fw is an effective focal length of the zoom lens at a wide-angle end and f6 is an effective focal length of the sixth lens group.

Abstract: In an image-capturing device having multiple optical systems, power consumption is reduced and operativity by the user is improved. The image-capturing device has an optical system having a relatively wide angle of view, and an optical system having a relatively narrow angle of view. An image processing system displays an image obtained by the optical system on a display device, crops, from the image of the optical system, an image corresponding to an image-capturing area according to an amount of operation of a zoom operation lever by the user, and displays the cropped image on the display device. When the user operates a release button, the image processing system and a lens control system drive the optical system to an angle of view corresponding to the image-capturing area and stores an image obtained by the optical system in a storage device.

Abstract: A compact or thin lighting system is provided. Light fluxes emitted from an arc tube 22 are made to enter from a light reception face c1 of an optical member 24 from a reflector 24 and to emit from a light emission face c3 orthogonal to the light reception face c1. Light fluxes entering the light emission face c3 at a small angle are reflected and turned to a main reflection face c2, and then emitted from the light emission face c3. By using total internal reflection of the light emission face, the size and thickness can be decreased.

Abstract: A sufficiently compact zoom lens equipped with a vibration-control function is provided. The zoom lens includes, in sequence 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 positive refractive power. The first lens group includes, in sequence from the object, a lens group having positive refractive power and a bending optical system for bending an optical axis to essentially an angle of 90°. Moreover, the third lens group has a stationary lens group having positive refractive power and a movable lens group having positive refractive power. During zooming operation, the second lens group and the fourth lens group are moved along the optical axis. During vibration-control operation, the movable lens group of the third lens group is moved in a direction orthogonal to the optical axis.

Abstract: To provide a zoom lens which attains high zoom ratio and high optical performance over the entire zoom range, enables vibration control and miniaturization, and is compatible with a solid-state imaging device with a large size and a large number of pixels, the zoom lens 10 includes a first lens group G1 having a positive refractive power, a second lens group G2 having a negative refractive power, a third lens group G3 having a positive refractive power, a fourth lens group G4 having a positive refractive power, and a fifth lens group G5 having a positive refractive power, which are sequentially arranged in that order from the object side. Zooming is performed by the independent movement of the first lens group G1, the second lens group G2, the third lens group G3, and the fourth lens group G4 along an optical axis. Image stabilization for mitigating camera shake is performed by the movement of the fourth lens group G4 along the direction perpendicular to the optical axis.

Abstract: A sufficiently compact zoom lens equipped with a vibration-control function is provided. The zoom lens includes, in sequence 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 positive refractive power. The first lens group includes, in sequence from the object, a lens group having positive refractive power and a bending optical system for bending an optical axis to essentially an angle of 90°. Moreover, the third lens group has a stationary lens group having positive refractive power and a movable lens group having positive refractive power. During zooming operation, the second lens group and the fourth lens group are moved along the optical axis. During vibration-control operation, the movable lens group of the third lens group is moved in a direction orthogonal to the optical axis.

Abstract: To provide a zoom lens which attains high zoom ratio and high optical performance over the entire zoom range, enables vibration control and miniaturization, and is compatible with a solid-state imaging device with a large size and a large number of pixels, the zoom lens 10 includes a first lens group G1 having a positive refractive power, a second lens group G2 having a negative refractive power, a third lens group G3 having a positive refractive power, a fourth lens group G4 having a positive refractive power, and a fifth lens group G5 having a positive refractive power, which are sequentially arranged in that order from the object side. Zooming is performed by the independent movement of the first lens group G1, the second lens group G2, the third lens group G3, and the fourth lens group G4 along an optical axis. Image stabilization for mitigating camera shake is performed by the movement of the fourth lens group G4 along the direction perpendicular to the optical axis.

Abstract: To obtain a high imaging performance even for a relatively long focal length in a zoom lens provided with an optical-path bending member for bending an optical path. The following are included: a first group of lenses G1 having a positive refracting power, a second group of lenses G2 having a negative refracting power, a third group of lenses G3 having a positive refracting power, and a fourth group of lenses G4 having a positive refracting power arranged in that order from the object side to the image surface side. Zooming is performed by moving the second group of lenses G2 and fourth group of lenses G4 along an optical axis. The first group of lenses G1 is constituted of a group of positive lenses L1 having a positive refracting power and an optical-path bending member L2 for bending an optical path arranged in that order from the object side to the image face side.

Abstract: A compact or thin lighting system is provided. Light fluxes emitted from an arc tube 22 are made to enter from a light reception face c1 of an optical member 24 from a reflector 24 and to emit from a light emission face c3 orthogonal to the light reception face c1. Light fluxes entering the light emission face c3 at a small angle are reflected and turned to a main reflection face c2, and then emitted from the light emission face c3. By using total internal reflection of the light emission face, the size and thickness can be decreased.

Abstract: There is provided a wide angle lens system configured to obtain excellent image forming performance even in a half field angle region of 40 degrees to 50 degrees. A wide angle lens system is constituted of a first lens having a negative refractive power, a light path bending member having no refractive power, a second lens having a positive refractive power, an aperture which adjusts a light amount, a first cemented lens formed by cementing a third lens having a positive refractive power and a fourth lens having a negative refractive power, a fifth lens having a positive refractive power, and an optically equivalent member which functions as a faceplate of an optical low-pass filter and a solid state imaging element.

Abstract: To obtain a high imaging performance even for a relatively long focal length in a zoom lens provided with an optical-path bending member for bending an optical path. The following are included: a first group of lenses G1 having a positive refracting power, a second group of lenses G2 having a negative refracting power, a third group of lenses G3 having a positive refracting power, and a fourth group of lenses G4 having a positive refracting power arranged in that order from the object side to the image surface side. Zooming is performed by moving the second group of lenses G2 and fourth group of lenses G4 along an optical axis. The first group of lenses G1 is constituted of a group of positive lenses L1 having a positive refracting power and an optical-path bending member L2 for bending an optical path arranged in that order from the object side to the image face side.

Abstract: In an image-capturing device having multiple optical systems, power consumption is reduced and operativity by the user is improved. The image-capturing device has an optical system having a relatively wide angle of view, and an optical system having a relatively narrow angle of view. An image processing system displays an image obtained by the optical system on a display device, crops, from the image of the optical system, an image corresponding to an image-capturing area according to an amount of operation of a zoom operation lever by the user, and displays the cropped image on the display device. When the user operates a release button, the image processing system and a lens control system drive the optical system to an angle of view corresponding to the image-capturing area and stores an image obtained by the optical system in a storage device. Information obtained by means of the optical system is used for focus adjustment, etc. of the optical system.

Abstract: A zoom lens has first to fifth lens groups G1 to G5 having positive, negative, positive, positive, and negative refractive power, in order from an object side. The first lens groups G1 includes a prism L2 for bending a light path. Zooming is performed by adjusting a focal length by linear movement of the second lens group G2 and fourth lens group G4 and compensating an image surface position by nonlinear movement of the fifth lens group G5. Focusing is performed by moving the fifth lens group G5.

Abstract: There is provided a wide angle lens system configured to obtain excellent image forming performance even in a half field angle region of 40 degrees to 50 degrees. A wide angle lens system is constituted of a first lens having a negative refractive power, a light path bending member having no refractive power, a second lens having a positive refractive power, an aperture which adjusts a light amount, a first cemented lens formed by cementing a third lens having a positive refractive power and a fourth lens having a negative refractive power, a fifth lens having a positive refractive power, and an optically equivalent member which functions as a faceplate of an optical low-pass filter and a solid state imaging element.

Abstract: A zoom lens has first to fifth lens groups G1 to G5 having positive, negative, positive, positive, and negative refractive power, in order from an object side. The first lens groups G1 includes a prism L2 for bending a light path. Zooming is performed by adjusting a focal length by linear movement of the second lens group G2 and fourth lens group G4 and compensating an image surface position by nonlinear movement of the fifth lens group G5. Focusing is performed by moving the fifth lens group G5.