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Wide-angle optical system for solid photographic component

A wide-angle optical system, solid-state imaging element technology, applied in optics, optical elements, lenses, etc., to suppress image surface curvature, maintain size and telecentricity, and correct distortion aberrations

Inactive Publication Date: 2003-12-17
ENPLAS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these are not used as optical systems for imaging but as optical systems for various sensors or photometry, which are very different from the purposes of the present invention.
In addition, the actual situation is that the angle of view of the screen is also narrow (for example, the maximum angle of view of the screen is about 35°), and there is no suggestion for solving the above-mentioned problems of the wide-angle optical system for imaging

Method used

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  • Wide-angle optical system for solid photographic component
  • Wide-angle optical system for solid photographic component
  • Wide-angle optical system for solid photographic component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] image 3 Shown is the first embodiment of the present invention, in this embodiment, with figure 1 The illustrated wide-angle optical system for solid-state imaging devices is similarly provided with an aperture 3 on the object side of the imaging lens 2 and a cover glass 5 on the imaging side.

[0087] In addition, the imaging lens 2 of the first embodiment sets the following conditions.

[0088] f1=1.50mm, FNo=2.4, 2ω=70°

[0089] i r1 d1 nd vd

[0090] 1(aperture) 0.000 0.00

[0091] 2 (first side of camera lens) 1.200 1.30 1.513 58.0

[0092] 3 (the second side of the camera lens) -1.370 0.30

[0093] 4 (1st side of cover glass) 0.000 0.70 1.518 64.0

[0094] 5 (the second side of the cover glass) 0.000 0.19

[0095] 6 (camera surface) 0.000 0.00

[0096] Aspheric coefficient

[0097] i k a b c d

[0098] 2 -2.00e-001 1.75e-001 -5.82e+000 3.59e+001 -1.00e+001

[0099] 3 -9.30e-001 2.67e-001 2.33e-003 2.76e-001 3.00e-001

[0100] Under such conditions, |r1 / ...

Embodiment 2

[0103] Figure 5 Shown is the second embodiment of the present invention, in this embodiment, with figure 1 The illustrated wide-angle optical system for solid-state imaging devices is similarly provided with an aperture 3 on the object side of the imaging lens 2 and a cover glass 5 on the imaging side.

[0104] In addition, the imaging lens 2 of the second embodiment sets the following conditions.

[0105] f1=1.60mm, FNo=2.8, 2ω=67°

[0106] i r1 d1 nd vd

[0107] 1(aperture) 0.000 0.00

[0108] 2 (first side of camera lens) 1.450 1.45 1.525 56.0

[0109] 3 (the second side of the camera lens) -1.325 0.30

[0110] 4 (1st side of cover glass) 0.000 0.70 1.518 64.0

[0111] 5 (the second side of the cover glass) 0.000 0.29

[0112] 6 (camera surface) 0.000 0.0000

[0113] Aspheric coefficient

[0114] i k a b c d

[0115] 2 -2.44e-000 9.00e-002 -1.80e+000 7.05e+000 -5.00e+000

[0116] 3 -2.33e+000 1.27e-001 -2.43e-001 6.51e-001 0.00e+000

[0117] Under such conditio...

Embodiment 3

[0119] Figure 7 Shown is the 3rd embodiment of the present invention, in this embodiment, with figure 1 The illustrated wide-angle optical system 1 for a solid-state imaging device is similarly provided with a diaphragm 3 on the object side of the imaging lens 2 and a cover glass 5 on the imaging side.

[0120] In addition, the following conditions are set for the imaging lens 2 in the third embodiment.

[0121] f1=2.00mm, FNo=2.8, 2ω=67°

[0122] i r1 d1 nd vd

[0123] 1(aperture) 0.000 0.00

[0124] 2 (first side of camera lens) 1.650 1.41 1.525 56.0

[0125] 3 (the second side of the camera lens) -2.060 0.30

[0126] 4 (1st side of cover glass) 0.000 0.70 1.518 64.0

[0127] 5 (the second side of the cover glass) 0.000 0.65

[0128] 6 (camera surface) 0.000 0.00

[0129] Aspheric coefficient

[0130] i k a b c d

[0131] 2 6.51e+000 2.34e-001 -8.51e+000 3.49e+001 1.00e+000

[0132] 3 -1.32e+000 1.96e-001 -2.30e-001 4.13e-001 3.88e-002

[0133] Under such condit...

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Abstract

Thw present invention relates to a wide-angle optical system for a solid-state image pickup element capable of excellently correcting distortion aberration. In a wide-angle optical system for a solid image pickup element, an image pickup lens 2 is a biconvex lens, and its surface closer to an image surface is being formed into such an aspherical shape that the positive refractive power is weaker at a location more spaced in a diametrical direction apart from an optical axis. Further, the image pickup lens 2 satisfies the following condition expression (1): 1.3>=|r1 / r2|>=0.8 wherein r1 is a radius of curvature of a surface of the image pickup lens closer to an object, and r2 is a radius of curvature of the surface of the image pickup lens closer to the image surface. Thus, the distortion can be corrected appropriately.

Description

technical field [0001] The present invention relates to a wide-angle optical system for a solid-state imaging device, and more particularly, to a wide-angle optical system for a solid-state imaging device suitable for use in imaging devices using the imaging device mounted on mobile phones, PC cameras, and the like. Background technique [0002] In recent years, with the development of multimedia, there is an increasing demand for cameras using solid-state imaging elements such as CCDs and CMOSs ​​that are mounted on laptop computers, videophones, and mobile phones. [0003] Since such a camera must be installed in a limited space, it is desired to be small and lightweight. [0004] For this reason, it is also desired that the optical system used in such a camera be compact and lightweight. [0005] Also, as solid-state imaging devices mounted in mobile phones and the like at present, there are known devices with a high resolution of about 300,000 pixels called VGA and a re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B9/02G02B13/00G02B13/18
CPCG02B13/006G02B9/02G02B13/0025G02B3/04
Inventor 齊藤共啓
Owner ENPLAS CORP
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