Abstract:
Provided are: a zoom lens which exhibits a large variable-power ratio, an increased degree of freedom with respect to aberration correction, and which has been achieved having a sufficient reduction in size in the optical axis direction; and an imaging device equipped therewith. The zoom lens includes at least, from the object side, a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, a fourth lens group, and a fifth lens group, in that order. In the zoom lens, prescribed conditions are satisfied.
Abstract:
A zoom lens includes a first lens group having positive refracting power, a second lens group having negative refracting power, a third lens group having positive refracting power, a fourth lens group having negative refracting power and a fifth lens group having negative refracting power in order from an object side, in which the lens groups move in magnification change from a wide angle end to a telephoto end such that a gap between the first lens group and the second lens group increases and a gap between the second lens group and the third lens group decreases, a negative lens group disposed closer to an image focusing side than a diaphragm among all lens groups is set as a focusing lens group, and the focusing lens group moves toward the image focusing side at focusing from infinity to a close object, and the fifth lens group includes at least a single lens block of a meniscus shape provided with a concave surface at an object side, the single lens block of the meniscus shape has a negative focal distance. The zoom lens and the fifth lens group each satisfies a respective conditional expression.
Abstract:
An image data transmitting device inputs and outputs to an external device, fisheye image data that includes a fisheye image captured by a lens that causes distortion to occur in an image at a wide angle view. The image data transmitting device includes a distortion correction processing unit that corrects the distortion of the fisheye image and forms a distortion corrected image; and a transmission image data generating unit divides along a scanning line, the distortion corrected image into a plurality of lines, re-arranges the lines based on a given criterion, forms a converted image, inserts the converted imaged into an area in which no effective video signal of the fisheye image data is present, and generates transmission image data.
Abstract:
A zoom lens includes sequentially from an 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, a fourth lens group having a positive refractive power, and a fifth lens group having a negative refractive power. The zoom lens satisfies given conditions to implement a compact, large aperture ratio zoom lens having excellent optical performance and compatible with solid state image sensors capable of recording full high vision images.
Abstract:
An object of the present invention is to provide an infrared camera capable of shading correction with ease and an improved degree of accuracy and has good maintenance ability. To achieve the object, an infrared camera provided with an infrared lens group and an infrared image sensor located at an image focusing surface of the infrared lens group in a housing in which a window is formed at a portion facing the object side of the infrared lens group comprising: a controller correcting a captured image according to an output from the infrared image sensor and outputting the corrected image; a shutter arranged on an infrared light path in the housing from the window to the infrared lens group; and a temperature sensor detecting the temperature of the shutter is adopted.
Abstract:
This invention is directed to provide an infrared camera lens that is simple in lens configuration and has lens pieces including only spherical surfaces but no aspheric surfaces. The invention is also directed to provide an infrared camera lens of a design that facilitates and implements an airtight environment within the lens barrel because the foremost or first lens closest to the object stays still during focusing, and the entire length of the lens system is unchanged for focusing. The infrared camera lens comprises the foremost or first single spherical lens piece of positive refractivity, the succeeding or second single spherical lens piece of negative refractivity, and the third single spherical lens piece of positive refractivity. At least the second single spherical lens piece of negative refractivity or the third single spherical lens piece of positive refractivity is to be moved for focusing.
Abstract:
A laser beam measurement device includes a plate-type first beam splitter, an observation device that reads an image of a spot formed by transmitted light or reflected light of a laser beam incident on the first beam splitter, and a calculation device that performs a numerical calculation on output data of the observation device to perform a correction, in which when certain coordinate axes orthogonal to each other on a plane perpendicular to an optical axis of a laser beam irradiation optical unit with origins of the orthogonal coordinate axes being located on the optical axis are defined as X and Y axes, the first beam splitter is disposed to be inclined at an angle α in a range of 30 degrees or more and 60 degrees or less with respect to the plane perpendicular to the optical axis with the X axis as a rotation axis.
Abstract:
Provided are: a zoom lens including, in order from an object side, a positive first lens group, a negative second lens group, an intermediate group as a whole, a negative lens group, and a rear group, wherein the intermediate group includes, in order from an object side, a first positive lens subgroup including one or two positive lenses, a first negative lens subgroup including only one cemented lens, a second negative lens subgroup including a negative lens with a concave surface facing an object, and a second positive lens subgroup including one or two positive lenses, the cemented lens constituting the first negative lens subgroup has at least one cemented surface with a convex surface facing an object, and a lens, closest to an image, of the second positive lens subgroup is a positive lens; and an imaging apparatus including the zoom lens.
Abstract:
A zoom lens includes, in order from an object side, a positive first lens group, a negative second lens group, a positive third lens group, a negative fourth lens group, and a negative fifth lens group, and magnifies by changing an interval on an optical axis between adjacent lens groups. The third lens group includes an object side portion group arranged on an object side with a widest air interval in the third lens group and an image side portion group arranged on an image side of the object side portion group, and the second lens group moves along the optical axis at a time of magnification change. The object side portion group and the image side portion group each include a positive lens, a positive lens, and a negative lens arranged in order from the object side. Further, an imaging device including the zoom lens is provided.
Abstract:
A zoom lens has a plurality of lens groups and is a zoom lens that zooms from the wide-angle end to the telephoto end by changing the distance between adjacent lens groups, and has an aperture stop and at least one focus group each on the object side and the image side with the aperture stop therebetween, and when focused from infinity to a close object, the focus groups move along the optical axis, and the focus group arranged on the object side closer than the aperture stop includes at least one lens, and the lens satisfies the predetermined conditional expression. In addition, an imaging apparatus includes the zoom lens.