Automatic focusing imaging module

An automatic and modular technology, applied in focusing devices, image communications, televisions, etc., can solve problems such as large similarity, unsatisfactory focusing effect of digital autofocus technology, and insufficient imaging capabilities

Active Publication Date: 2013-09-11
深圳小象光显有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the defect of digital focusing is that for close distances, the imaging capability is insufficient due to the large similarity of the MTF curves. Generally speaking, if the o

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  • Automatic focusing imaging module

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Embodiment Construction

[0011] see figure 1 and figure 2 , is an autofocus imaging module 1 according to an embodiment of the present invention, including an imaging lens 100, a circuit board 200, an image sensor 300, a color separation processor 400, a shape memory alloy (shapememoryalloy, SMA) driver 500 and A controller 600.

[0012] The imaging lens 100 has an optical axis OO and includes a lens barrel 10 , a lens base 12 and at least one aspherical lens 14 with positive refractive power. The light is projected to the sensing area of ​​the image sensor 300 through the imaging lens 100 and forms an image in the image sensing area.

[0013] The lens barrel 10 is roughly hollow cylindrical, which includes a cylindrical main body 101, a front cover 102 extending from one end of the main body 101 to the central axis of the main body 101, and a front cover 102 surrounding the front cover 102 and facing The flange portion 103 extends away from the front cover portion 102, and the central axis of the...

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Abstract

An automatic focusing imaging module comprises an imaging lens, an image sensor aligned to the optical axis of the imaging lens, a color separating processor, a controller and a shape memory alloy driver. Light passes through the imaging lens to be imaged on the image sensor. The color separating processor expresses an image sensed by the image sensor through three-primary colors respectively. The controller carries out MTF calculation on the image sensed by the image sensor, and current shooting object distance is determined according to a calculating result. When the current shooting object distance is larger than a preset standard value, the controller conducts defocusing fuzzy modification on the image sensed by the image sensor. When the shooting object distance is smaller than the preset standard value, the controller controls the shape memory alloy driver to drive the imaging lens to focus. The automatic focusing imaging module can obtain an image which is clearly focused no matter whether the object distance is larger than the preset standard value or not.

Description

technical field [0001] The invention relates to an imaging module, in particular to an autofocus imaging module. Background technique [0002] Digital auto-focus technology uses software simulation and calculation to process the image sensed by the image sensor, making the image blurred due to out-of-focus pixels on the image sensor become clear. Extended depth of field (ExtendedDepthofField: EDoF) technology is a common digital autofocus technology, which uses the three primary colors of light (red, green, blue) to have the best modulus transfer function (modulation transfer function, MTF) curve at different distances , so the best primary color at the current distance of the object can be used to digitally simulate the other two primary colors using an algorithm to achieve a full-frame, full-color, clear image. However, the defect of digital focusing is that for close distances, the imaging capability is insufficient due to the large similarity of the MTF curves. Generall...

Claims

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Application Information

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IPC IPC(8): G03B13/36G02B7/36H04N5/232
Inventor 陈昱翰姚友琛
Owner 深圳小象光显有限公司
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