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CN102549472A - 变焦透镜及摄影装置 - Google Paten

CN102549472A - 变焦透镜及摄影装置 - Google Patents 变焦透镜及摄影装置 Download PDF Info Publication number ... Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

US7190529B2 - Zoom lens - Google Paten

The invention is concerned with a high-zoom-ratio, high-performance zoom lens that is much more improved in compactness. The zoom lens comprises a first lens group G 1 of positive refracting power, a second lens group G 2 of negative refracting power, a third lens group G 3 of positive refracting power and a fourth lens group G 4 of positive refracting power, with a varying space between ...

JP2006133632A - Zoom lens - Google Paten

PROBLEM TO BE SOLVED: To provide a high zoom ratio/high performance zoom lens whose zoom ratio is about 8 to 10, whose half viewing angle at a wide angle end is ≥about 35°, and which has high performance and is excellent in compactness. SOLUTION: The zoom lens has a 1st lens group G1 having positive refractive power, a 2nd lens group G2 having negative refractive power, a 3rd lens group G3 ...

US7190529B2 - Zoom lens - Google Paten

The invention is concerned with a high-zoom-ratio, high-performance zoom lens that is much more improved in compactness. The zoom lens comprises a first lens group G 1 of positive refracting power, a second lens group G 2 of negative refracting power, a third lens group G 3 of positive refracting power and a fourth lens group G 4 of positive refracting power, with a varying space between ...

CN102549472B - 变焦透镜及摄影装置 - Google Paten

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) 2010-05-19 Filing date 2011-05-10 Publication date 2014-07-30 2010-05-19 Priority to JP2010114966 priority Critical 2010-05-19 Priority to JP2010-114966 ...

CN102549472A - Zoom lens and imaging device - Google Paten

Disclosed is a zoom lens that enables lower costs, suppression of temperature fluctuation effects, and satisfactory correction of aberrations. The zoom lens has a first lens group to a fourth lens group, in order from the object side to the image side, and changes magnitude by changing the spacing between same. The first and third lens groups have a negative refractive power and the second and ...

US20060291070A1 - Google Paten

A variable magnification optical system for forming an optical image of an object on a light-receiving surface of an image sensor with variable magnification includes: from the object side, at least a first lens unit having a positive optical power, a second lens unit having a negative optical power, a third lens unit having a positive optical power, and a fourth lens unit having a positive ...

US7190529B2 - Zoom lens - Google Paten

The invention is concerned with a high-zoom-ratio, high-performance zoom lens that is much more improved in compactness. The zoom lens comprises a first lens group G 1 of positive refracting power, a second lens group G 2 of negative refracting power, a third lens group G 3 of positive refracting power and a fourth lens group G 4 of positive refracting power, with a varying space between ...