Optical element, imaging lens unit, image pickup apparatus

A technology of optical components and lenses, applied in the field of image pickup devices, can solve problems such as difficult to remove

Inactive Publication Date: 2013-04-03
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with recent reductions in size and thickness, ghosting or flare has become more likely to occur and difficult to remove

Method used

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  • Optical element, imaging lens unit, image pickup apparatus
  • Optical element, imaging lens unit, image pickup apparatus
  • Optical element, imaging lens unit, image pickup apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0036] Configuration of Optical System in Image Pickup Device

[0037] figure 1 is an exemplary cross-sectional view showing the relationship between the optical system and incident light in the image pickup device according to the first embodiment of the present technology. The optical system of the first embodiment includes a first lens 110 having positive refractive power, a second lens 120 having negative refractive power, a third lens 130 having positive refractive power, and a fourth lens 140 having negative refractive power. Hereinafter, each of the first lens 110 to the fourth lens 140 is sometimes simply referred to as a 'lens'. Each lens has an effective diameter area corresponding to the effective diameter 70 which is centered on the optical axis 90 and which transmits the effective light beam. The part of the lens surrounding the effective diameter area is called the flange part. The side surface of the flange portion facing the object side is called an object s...

no. 3 example

[0061] Configuration of Optical System in Image Pickup Device

[0062] Figure 8 is an exemplary cross-sectional view showing a relationship between an optical system and incident light in an image pickup device according to a third embodiment of the present technology. Similar to the first embodiment, the optical system of the third embodiment includes a first lens 110 with positive refractive power, a second lens 120 with negative refractive power, a third lens 130 with positive refractive power, and a fourth lens 140 with negative refractive power . Similar to the first embodiment, the optical system further includes light shielding members 151 to 153 , a lens holder 160 , a filter 180 and an image pickup device 190 .

[0063] As described above, the concave portion 121 is provided in the outer edge portion of the image-side flange surface 129 of the second lens 120 in the first embodiment, while the concave portion 122 is provided in the inside of the image-side flange s...

no. 4 example

[0071] Configuration of Optical System in Image Pickup Device

[0072] Figure 10 is an exemplary cross-sectional view showing a relationship between an optical system and incident light in an image pickup device according to a fourth embodiment of the present technology. Similar to the first embodiment, the optical system of the fourth embodiment includes a first lens 110 with positive refractive power, a second lens 120 with negative refractive power, a third lens 130 with positive refractive power, and a fourth lens 140 with negative refractive power . Similar to the first embodiment, the optical system further includes light shielding members 151 to 153 , a lens holder 160 , a filter 180 and an image pickup device 190 .

[0073] Similar to the third embodiment described above, in the fourth embodiment, the recess 121 is provided in the outer edge portion of the image-side flange surface 129 of the second lens 120 , and the recess 122 is provided in the inner edge portion o...

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PUM

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Abstract

An optical element includes an effective diameter area that is centered on an optical axis and transmits an effective light beam, and a flange portion having, on a side surface around the effective diameter area, a slope that is not perpendicular to a direction of the optical axis.

Description

technical field [0001] This technology relates to optical components. Specifically, the present technology relates to the shape of a lens in an imaging lens unit, and to an image pickup device employing such a lens. Background technique [0002] An image pickup apparatus employing a solid-state image pickup device such as a CCD or a CMOS sensor, for example, a camera-equipped mobile phone or a digital still camera has been used. There is a need to reduce the size and thickness of such an image pickup device, as well as the size and length of an imaging lens included in the image pickup device. [0003] In recent years, compact image pickup devices, such as camera-equipped mobile phones, have been reduced in size and increased in the number of pixels of the image pickup device. Types including high-pixel-count image pickup devices having a large number of pixels equivalent to digital still cameras have begun to spread. Therefore, the image pickup device includes an imaging...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B7/02H04N5/225
CPCG02B13/004G02B7/02G02B3/00G02B7/021H04N23/55
Inventor 西本雅志冈野英晓都丸高宽
Owner SONY CORP
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