Imaging apparatus

An imaging device and imaging technology, applied in installation, optics, instruments, etc., can solve problems such as unfavorable miniaturization and increase in length, and achieve the effects of being conducive to miniaturization, easy assembly, and high yield rate

Active Publication Date: 2016-11-30
JIAXING ZHONGRUN OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, the length on the X-axis or Y-axis will increase, that is, the length in a certain direc

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0064] Example one:

[0065] Optical characteristic parameters of this example: focal length F=1.33, relative aperture Fno=2.0, and field angle FOV=190 degrees.

[0066] Table 1 provides a set of lens parameters:

[0067]

[0068]

[0069] The aspheric coefficients for this example are listed in the table below:

[0070] surface number

[0071] figure 2 is the MTF diagram of the wide-angle lens in this example. The horizontal axis in the figure represents the spatial frequency, unit: line pair per millimeter (lp / mm); the vertical axis represents the value of the modulation transfer function (MTF), which is used to evaluate the imaging quality of the lens, and the value range is 0 ‐1, the higher and straighter the MTF curve, the better the imaging quality of the lens, and the stronger the ability to restore the real image. figure 2 Including diffraction limit 21, axis 22, R line 23 and T line 24 at 0.3Field (26.00°), T line 25 and R line 26 at 0.7Field (63...

Example Embodiment

[0077] Embodiment 2:

[0078] Optical characteristic parameters of this example: focal length F=1.28, relative aperture Fno=2.03, and field angle FOV=190 degrees.

[0079] Table 2 provides a set of lens parameters:

[0080]

[0081]

[0082] The aspheric coefficients for this example are listed in the table below:

[0083] surface number

[0084] Image 6 and Figure 7 They are the schematic diagram of the structure and the schematic diagram of the field curvature and axial chromatic aberration of Example 2, respectively.

Example Embodiment

[0085] Embodiment three:

[0086] The optical characteristic parameters of this example: focal length F=1.35, relative aperture Fno=2.01, field of view FOV=190 degrees.

[0087] Table 3 provides a set of lens parameters:

[0088]

[0089]

[0090] The aspheric coefficients for this example are listed in the table below:

[0091]

[0092]

[0093] Figure 8 and Figure 9 They are the schematic diagram of the structure and the schematic diagram of field curvature and axial chromatic aberration of Example 3, respectively.

[0094] Figure 10 It is shown as a half-section schematic diagram of the use state of the wide-angle lens described in the embodiment. The first wide-angle lens of the first imaging system and the second wide-angle lens of the second imaging system have their own independent holders 1 and reflective elements 12. The holders are connected by The device is combined so that the optical axes of the front lens group part 2 of the first wide-angle l...

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Abstract

The invention discloses an imaging apparatus. The imaging apparatus comprises two same structured imaging systems, each imaging system is provided with a wide-angle lens and an image sensor, each wide-angle lens has a field angle greater than 180 degrees and comprises a front lens group part, a reflection element and a rear lens group part which are successively arranged from an object side, the optical axes of the front lens group parts are successively bent towards the rear lens group parts through the reflection elements, an image with a solid angle of a 4 pi radian is obtained by combining images shot by the two wide-angle lenses. According to the invention, each wide-angle lens comprises one front lens group part, one independent reflection element and one rear lens group part. Such a separate structure can reduce the interval of the two lenses between first lenses of a light incident direction and also facilitates assembling protection.

Description

Technical field: [0001] The invention relates to an optical imaging device. Background technique: [0002] Existing image capture systems capable of ingesting a 4π solid angle are achieved using two wide-angle lenses. The more common solutions on the market are realized by using two independent back-to-back wide-angle lenses. The characteristic of this type of solution is that after the two lenses are respectively combined with the sensor to form a module, the optical axes coincide to form an optical system in opposite directions. Due to the imaging system composed of two wide-angle lenses, the length in the direction of the optical axis is superimposed on the total length of each lens. When the resolution of the lens increases or the size of the sensor becomes larger, the lens needs to be longer. [0003] When two wide-angle lenses with an angle of more than 180° are combined, there is a non-overlapping portion between the light rays at the maximum incident angles of the...

Claims

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Application Information

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IPC IPC(8): G02B13/06G02B13/00G02B7/02
CPCG02B7/021G02B13/002G02B13/0065G02B13/06G03B17/17
Inventor 盛亚茗李斌镏张云涛陈三忠
Owner JIAXING ZHONGRUN OPTICAL TECH
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