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Phase correction plate, imaging system and apparatus, mobile phone, in-vehicle device, monitor camera, endoscopic apparatus, digital camera, digital video camera, and lens unit

A phase correction and imaging lens technology, which is applied in the field of imaging systems, can solve the problems of difficult performance inspection of lens units, increased cost of lens units, and difficulty in excluding optical performance of lens units.

Inactive Publication Date: 2010-10-27
FUJI PHOTO OPTICAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to exclude the wavefront modulating surface (phase modulating surface) from measuring the optical performance of the lens unit
In the manufacture of the lens unit, the inspection for testing the performance of the lens unit becomes difficult and increases the cost for manufacturing the lens unit

Method used

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  • Phase correction plate, imaging system and apparatus, mobile phone, in-vehicle device, monitor camera, endoscopic apparatus, digital camera, digital video camera, and lens unit
  • Phase correction plate, imaging system and apparatus, mobile phone, in-vehicle device, monitor camera, endoscopic apparatus, digital camera, digital video camera, and lens unit
  • Phase correction plate, imaging system and apparatus, mobile phone, in-vehicle device, monitor camera, endoscopic apparatus, digital camera, digital video camera, and lens unit

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Embodiment Construction

[0173] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. figure 1 is a sectional view showing a state where a phase correction plate according to an embodiment of the present invention is mounted on an imaging lens. Figure 2A is a diagram showing a phase correction plate viewed from the optical axis direction. Figure 2B is a cross-sectional view showing the phase correction plate viewed from a direction perpendicular to the optical axis. image 3 is a diagram showing deformation of the wavefront form of light that has passed through the phase correction plate.

[0174] Figure 4A is a graph showing a change in diameter of each spot formed at a corresponding position on an imaging plane by light passing through an imaging lens on which a phase correction plate is mounted, during defocusing. exist Figure 4A In the coordinates of , the horizontal axis Z1 represents the optical axis, and the vertical axis H rep...

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Abstract

A phase correction plate is mounted on an imaging lens. The phase correction plate is structured in such a manner that the phase difference of light that has passed a middle region of the phase correction plate is lower than the phase difference of light that has passed a peripheral region of the phase correction plate, and that in the peripheral region, the phase difference of light that has passed through the phase correction plate increases from the middle-region side of the peripheral region toward the periphery side of the peripheral region.

Description

technical field [0001] The present invention relates to a phase correction plate to be mounted on an imaging lens, an imaging system for restoring image data representative of a subject obtained through the imaging lens on which the phase correction plate is mounted, and imaging systems including the imaging system equipment. Furthermore, the present invention relates to a mobile phone, a vehicle-mounted device, a surveillance camera, an endoscope device, a digital camera, and a digital video camera including the imaging system, and a lens unit including the phase correction plate. Background technique [0002] Conventionally, mobile terminal devices such as mobile phones with built-in cameras are known. As an imaging lens for a small camera mounted on a mobile terminal device, an imaging lens having a focus adjustment mechanism using a focusing method, and an imaging lens having no focus adjustment mechanism but using a fixed focus method are known (please refer to Japanes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B3/00G02B15/00G02B13/24H04N5/225
CPCG02B13/0045G02B27/0025G02B13/001G02B9/34
Inventor 佐藤贤一西畑纯弘岸根庆延
Owner FUJI PHOTO OPTICAL CO LTD