Method for designing photographing device

A design method and camera lens technology, applied in image communication, television, optics, etc., can solve problems such as short working life, high cost, and complex design

Active Publication Date: 2013-01-09
云南大景光电科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So as to solve the technical problems existing in the prior art, such as the need to insert additional components, complex design, short working life, high cost and bulky equipment

Method used

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  • Method for designing photographing device
  • Method for designing photographing device
  • Method for designing photographing device

Examples

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no. 1 example

[0047] Figure 5 An imaging device according to a first embodiment of the present invention is shown. The large depth of field imaging device is composed of a large depth of field imaging lens 1 and a CCD camera 2 (without lens) with a horizontal resolution of 480 lines. The lens 1 includes seven lenses, of which the third and fourth The lens is a cemented lens, the focal length of lens 1 is f'=5mm, the field of view 2ω=100° (horizontal 80°, vertical 57°), and other parameters of lens 1 are shown in Table 1

[0048] Shown:

[0049] The distance L from the focusing point to the spherical apex of the lens is 250mm. According to the size and resolution of the CCD, the allowable diameter of the circle of confusion δ on the CCD can be calculated as 0.02mm, the aperture value is F=5.9, and the position of the entrance pupil is l Z =16.0mm. It is necessary to convert L into the focusing object distance from the focusing point to the entrance pupil of the lens:

[0050] P=L+l Z =...

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Abstract

The invention discloses a method for designing a photographing device with high depth of field. A lens with a constant focal length is adopted by the photographing device. When the lens is initially designed, the parameter design for a lens optical system is performed by taking an object plane at a focusing object distance required by the subsequent practical working environment as a standard object plane. The method comprises the following steps: confirming the focal length of the lens according to an image plane size of an imaging device arranged on the lens and a to-be-observed field range; confirming the focusing object distance according to a to-be-observed depth range; selecting the standard object plane according to a selected focusing object distance value; and performing parameter optimizing design for the optical system on the lens according to the standard object plane. The photographing device designed by utilizing the method has the advantages that the depth of field is increased without inserting an extra element, the focusing is unnecessary and the cost is low.

Description

[0001] This application is a divisional application of the application number 201010117209.8, the filing date is February 20, 2010, the earliest priority date is February 12, 2010, and the title of the invention is "camera device and its design method". technical field [0002] The invention relates to an imaging device, in particular to an imaging device with a large depth of field that does not need to be adjusted. The invention also relates to a design method of such a camera device with a large depth of field. Background technique [0003] In today's society, various camera devices have been widely used in every corner of human life, such as surveillance cameras in banks, hotels and buildings, cameras for monitoring road safety, cameras used in movie shooting, and hand-held cameras. These camera setups have long suffered from insufficient depth of field. Depth of field refers to the object distance range measured along the axis of the imager in front of the camera lens ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/00G02B13/00H04N5/225
Inventor 郭京刘云峰何江
Owner 云南大景光电科技有限公司
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